1). 0 / V3. 99. 050 on 114LSA cam sequential fuel and sequential spark LS3/LSA card MAF sensor 97 Mazda MX5 MS3 2002 vvt motor. I am now trying to wire together an ignition system, but I'm essentially starting from scratch. ModMotorMayhem. That’s it! Using the MS-I PCBv3 or V3. Over Boost Switch - Left of center on front of IC – (930-606-101-00-M100) Pin 4 – Green / Red. The MS3X has a copy of this circuit that is used for cam or second trigger input. 0 MicroSquirt with 30″ Harness is an entry-level, fully assembled ECU and universal 30″ pigtail with varied applications targeting power sports, single cylinder all the way up to 8 cylinders. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. This terminal is also grounded to the engine block. Colors shown are for factory wiring harnesses. MS3X setup and comm issues. Note that the DIY Autotune wiring harness has a shielded wire – connect only the inner wire to this pin! Connect the E pin to MS3X pin 14 to send the timing signal to the HEI module. 57: Install a 1K resistor in the R57 slot. Reviews . ( 4 customer reviews) $ 114. g. Both composite and tooth loggers completely lack input from the crank sensor. 8′ of TXL High temp automotive grade wire. #32. 49 $ 6. MegaSquirt 3 Engine Management System w/PCB3. I've read the MS3 manual wrt grounding and understand importance of running grounds back to MS. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. Note that the DIY Autotune wiring harness has a shielded wire – connect only the inner wire to this pin! Connect the E pin to pin 27. Memories: '68 912, '72 911T, '80 911SC, '84 911,. It's a bitch reading the spark wires. 4 Crank / Cam Inputs The Crank and Cam sensors provide the. Help with traction control wiring and needs. To start viewing messages, select the forum that you want to visit from the. 5 out of 5 $ 114. Powers all the injectors. External pull up: Connect a 1K resistor between the wire on pins 24 and 26 on the main board harness. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 57, put main board JP1 in the 1-2 position and J1 in the 5-6 position. Ibrahim Nzioki On Twitter 2 Engine Harness Layout Since The Donor Was From An E36. On to all the injectors. (Speed Density only. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Use with MS3X Expansion board or other sequential device. MegaSquirt MS3X Wiring Bundle – Length = 8′. 0 – Unassembled Kit Part # MS330-K. 0 0 Hardware Guide General layout for 4-cyl coil-on-plug using LS coils. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. Learn how to set up and tune your MS3X/V3. This is for 1. The R pin is the HEI module’s tach output. Megasquirt Ls Wiring Harness megasquirt wiring harness diagram,megasquirt 3 wiring diagram,megasquirt 2 wiring instructions,megasquirt 2 wiring diagram,maxxecu ls wiring harness,megasquirt ms3x wiring diagram,ls plug and play wiring harness,ls motor wiring harness, You can also use it to hold it on the barbs on. 5 out of 5 $ 114. Would 18 gauge be alright to run from the MS. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. I have some questions as I am hooking up the wiring. The crank sensor shield is also listed as Pin #2, but that just seems to be another ground wire on my harness that was routed out towards the sensors. ms3x box w/harness. Wiring Harness, MegaSquirt, 8 ft. 3. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 1 ecu that is the vanos motor. B1 (Relay Ground for Fan) 12v Switch 5vRef Grounds Dedicated Ground MS3X Board: Inj. To make sure you can't accidentally switch the upper and lower harnesses, the MS3X harness uses a male DB37 connector instead of a female one. The versatile MicroSquirt with 8′ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. The MS3Pro measures approximately 8. You don't need that ignition module, you ve COP on your car and you need to find a way to ignite your coils with MS3X spark outputs. 57 with MS1/Extra firmware. I pulled the wire harness out and check all my wiring. 57 with MS3X $99. Serving my area. 3. 99. 6. Which outputs (A,B,C and D) go to. the US Shift Pick-4 trans contoller is kinda expensive at $750 for harness and controller. And the newest version of tuner studio. 00 MSHarness: 10' main board wiring harness $79. I have the MS3X harness wired up to the Quadspark but can't find any info on how to wire the Quadspark to the Ford factory coils. MS3x Wiring Questions. 0 Hardware Manual - Megasquirt UK Official SiteThis manual provides detailed instructions and diagrams for installing and configuring the MS3X/V3. Powered up my MS3x 3. megasquirt ms3x v3. Wire the distributor’s VR sensor to the HEI module VR inputs. 3) MS3 Cam Input (Dual VR v2. 99 Quantity Add to cart MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. Step 1) Decide which manual is correct for your engine (24x reluctor engine or 58x reluctor engine). Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here!. Customer reviews. 00 MS3X-Hrn: 10' MS3X wiring harness $22. MS3 w/code 1. External Ignition Wiring. 8. It will start with it un plugged and even cut the MS3x wire going into the harness for cam in and it still shows a tooth logger pattern when it starts up. 4? Well it's a test motor for learning megasquirt before the engine swap to a 1UZ. Buy their pre assembled wiring harness to make it crazy simple. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Search; Contact; Facebook; Instagram; Join our mailing list. 6 flywheel (60-2 teeth). This terminal is also grounded to the engine block. 57 – The MegaSquirt 3 is a drop in daughter card that greatly expands the MegaSquirt’s functionality. 3 Re-pinning the DB37; 3. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Would 18 gauge be alright to run from the MS. 9 Magnum. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. 1 ecu from bosch (Code 402) and have only been able to find wiring diagrams for the similar 3. harness side) when showing db37 pinout at all times. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. 12v fused feed- from fuse box powered by the fuel pump relay. External pull up: Connect a 1K resistor between the wire on pins 24 and 26 on the main board harness. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’One 12V, one ground, one crank sensor and one cam sensor. Wiring ultimate ms3 pro ms3pro pinout diagram evo harness standalone megasquirt ecu engine manual downloads center ls diyautotune gen management Wiring diagram miata control ms3 swap vvt tracking issues down help using circuit alt megasquirt connector ms3x build flipped stolen 3. by Dennis930 » Fri Jul 30, 2010 1:56 am. ( 7 questions) 5 out of 5 based on 6 customer ratings. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. MS3X Cam VR wiring. So i need to add in a few sensors for Oil Pressure, Fuel Pressure, 0-5v Dashpot, and wire to some specific ports for the trans brake staging and 3 step switches. I've had a build thread for the car going for quite sometime now which can be found here: Basically, at this point I've begun to build the wiring harness and wanted to not only ask a couple of questions, but confirm a few things I believe to be correct. It sounds like your saying I cant do that but just move the GREEN and RED wiring from my LED's to the ms3x expansion board itself. We’ve got your MS3Pro ECU with drop-on/PNP LS Wiring Harness, ready to make the job EASY! News & Updates Read More. I spent a lot of time determining wire gauge and connector type needed to safely carry the loads. If I am using an MS3 with MS3X, do I use this harness or the MS3X harness? The MS3 with MS3X has two DB37 connectors, each of which use a harness. billr wrote: If it will fire while cranking, then die as soon as the key is released back to the "run" position, it seems like your primary problem is how the ignition switch is wired to provide power; probably has nothing to do with the tune. MegaSquirt MS3X Wiring Harness for full sequential fuel injection and ignition, as well as tons of other I/O (Dual Stage Nitrous, 2nd O2 Sensor, Boost/Launch Control, etc) This is the harness build guide for the Megasquirt MS3X. MS3Pro ULTIMATE Pinout Glossy Card. 2. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. 99. . . Would 18 gauge be alright to run from the MS. 6 wires off main harness terminate on engine sensors and switches. I am opting to run sequential injection rather than bank-fire and will use an MSD box to fire the coil. I have pictured what i think is the main starting circuit relays or the main relays off of the zxt. Notably, the car features a BMW E46 M3 6-speed transmission, a Thayer Motorsport upgraded Limited Slip differential, and a meticulously assembled engine. This version of the documentation applies to: • MS3 on a V3. See the MS3 manual wiring diagram for how to wire it up. 1 ecu that is the vanos motor. I am in the final stages of drawing up my wiring diagram for Megasquirt MS3X on a 3. 0pcb. Would 18 gauge be alright to run from the MS. (no paper tags). ,230/232 @. HOWEVER when using the test page it seems that I am STILL not getting any spark signal from the. View Profile View Forum Posts. Made of the same TXL rated automotive grade. Wiring Harness Adapter Guide For E30 M60 And Obd 1 M62 Swap Pinout A Cheap Way Of Getting X20 C101 Connectors Rts Your Total Bmw Enthusiast. Run this resistor-on-a-wire from the 5 volt terminal in the proto area to the same input pin (SPR1 or PAD7) used in the previous step. The line does not need to be huge. SAYS IF HALL SENSOR. In step 22, install the stepper IAC jumpers (all of our assembled MS3 units are by default configured this way). GeorgePatches wrote: I actually found the answer on the megamanual website for the MS2. 00 StimPower: JimStim power supply $83. MegaSquirt Wiring Harness - 24 inches long Completely redesigned version adds more features to help make your installation as easy and reliable as possible. Distance. Naturally, I have raised these on the MS forum, but there is next. . With initial cranking, the LEDs flash in the correct firing order sequence, then they just seem to lose the plot and go random when sync loss kicks in. MegaSquirt-I Relay Cable (if you’re using the relay board and cable, you don’t need the standard MSHarness12, see note in product description) 8′ MegaSquirt Wiring Harness for MS3X. MS3X wiring and settings. I've already searched the archives and was unable to located anything beyond 1982. Matt Cramer -1966 Dodge Dart slant six running on MS3X. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. Add. This uses the PWM idle driver on the MS3X board. It is capable of controlling sequential injection on engines up to 8 cylinders, or semi-sequential up to 16 cylinders, combined with direct fire ignition for. 3) MS3 Cam Input (Dual VR v2. 8′ MegaSquirt Wiring Harness for MS3X. This wire will provide 12V power for the e-fan. Older sensors used a specific keying you had to match with the connector you’re using. MegaSquirt Relay Cable. 18aw for the single wire supply is plenty big enough. Megasquirt 3 with 3X Expander and V3 CPU. Am I missing it or is there a color code key for the ms3x harness. MegaSquirt MS3X Wiring Pigtail – Length = 24" 24″ of TXL High temp. This harness connects to the lower (main board) connector, while the upper (MS3X) connector uses the MS3X harness. The MS3Pro Module is approximately 5. 60. I beleive it is 10G wiring to the controller (18g pwm wire) and 12-14G out to each fan. ( 14 questions) 5 out of 5 based on 8 customer ratings. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Use with MS3X Expansion. I have just recevied a MS3 card and in anticipation of obtaining a MS3x, after reviewing the latest MS3x wiring schematic, pin 2 is now shown. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. 5 out of 5 $ 114. 500 Hwy 133. 57 board, the ms3x wiring harness, 7mgte CPS and am getting decent cam/crank signal(not full sync yet, however I have full sync at crank and up to around 1000rpm, but that's another topic). Wiring harnesses at carid. MegaSquirt Relay Cable. ( 8 customer reviews) $ 1,749. 1. i will update this as frequent as i have questions which im sure will be alot due to this being my first car ill be wiring up myself. For a V3. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. ( 8 customer reviews) $ 1,749. I am using a preassembled ms3x system with a 3. 3) MS3 Cam Input (Dual VR v2. We offer most of our MegaSquirt systems as kits or assembled units to give you plenty of tuning options for your budget and needs. . MS3X Quadspark wiring. Uploaded by Ojeda Orlando. Connect your Megasquirt to a 12V fused supply either in the vehicle or on the bench. 0 mainboard. 24″ of TXL High temp automotive grade wire. 00. 24″ of TXL High temp automotive grade wire. 2 general purpose on/off outputs – can be repurposed as spark outputs with switchable pull ups. If you're out of MS3X outputs, you'll have to add mods to the main board. - Full custom harness builds - DIY wiring solutions - Circle track harnesses - Standalone installs. 180-0715 Wiring Harness - Direct Fit, Sold individually. braineackMegaSquirt MS3X Wiring Harness – 8 feet. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . ‘Optional’ MegaSquirt Relay Board – Assembled Unit. You may have to register before you can post: click the register link above to proceed. 1 uF capacitor from JS10 to SG or the proto area ground. So the valve should be open 1/2 way; however, it seems that the. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. Otherwise when current flows through the grounds, there is a potential developed and the "ground" on the cam sensor will be below the ground on the Megasquirt. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Use with MS3X Expansion board or other sequential device. I am able to read a signal on the wire to the harness. 0 MicroSquirt with 8′ Harness is an entry-level, fully assembled ECU and universal 30″ pigtail with varied applications targeting power sports, single cylinder all the way up to 8 cylinders with up. Color coded wiring with. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Remove the entirety of the engine wiring harness. We've got a pre-assembled MS3 with the MS3X extra board, and I believe it is a V3. MegaSquirt 3 ECU with MS3X Expansion. 5bar map built into the MS unit. Connect a 0. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. At that time pin 2 on the MS3x connector was assigned as 12 VDC. Add to cart. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. The crank position input, is has the red wire from point 25 meeting the black from point 8 and then connecting to a blue and yellow wire at the pigtail. pin 21 CLT signal. Pull Spare Wires from Megasquirt Harnesses overall cost is a big factor to me. . the universal Terminator X 550-937 kit is like $1070. MS3 3. overall cost is a big factor to me. SAYS IF HALL SENSOR. 18" pigtail harness for VVTuner variable valve timing controller. Hardware manual covering specific wiring and configuration of your Megaquirt MS2/V357 ECU. 4g63 with stock 1990 sensor. MegaSquirt MS3X Wiring Pigtail – Length = 24″. 2 high impedance injector outputs – max peak current increased to 19 amps. 1 Best Practices. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. I think I already know the answer to my question, but I want to ask first before I re-do my wiring. External Ignition Wiring. Why bother with a 2. 0 mainboard. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. 1 Best Practices. VVTuner 18″ Pigtail Wiring Harness $ 34. Obd1 and OBD2 cam sensors are 3 wire but the plugs are inverted male and female from obd1 to obd2. All distances <. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Would 18 gauge be alright to run from the MS. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Showing: 4 results for Wiring Harness near Victoria, BC. The heart of the beast! A turbocharged 2JZ dancing to the tune of an MS3X ECU. Hardware. I need some advice from the group. MS3 Pro Plug and Play for 04-05 Mazda Miata Mazdaspeed Miata. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. On to all the injectors. On a V3. Add to cart. Then I checked from the bulkhead to the Ms, that was good. This Excel file details the required connections for Megasquirt 3 (MS3) and the Megasquirt 3 Extender (MS3x), using an 88 pin connector and wiring harness from either the 1992 325i (E36, Motronic 3. SAYS IF HALL SENSOR. by jsmcortina » Thu Aug 14, 2014 5:02 pm. 20 pages. 1 ecu from bosch (Code 402) and have only been able to find wiring diagrams for the similar 3. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. I use a 2 wire PWM Ford style idle valve. 3. 1. 411 subscribers. there are some other controllers that. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Worked all good in the Output test mode. I've read the MS3 manual wrt grounding and understand importance of running grounds back to MS. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags. Internal pull up: For a V3. I've tried each wire from the sensor. Find DIYAutoTune MegaSquirt MS3X Wiring Harnesses and get Free Shipping on Orders Over $109 at Summit Racing! DIYAutoTune MegaSquirt MS3X wiring harnesses are 8 feet of TXL high-temp automotive grade wire. If that's the case how can I change the inputs; From what I understood I would just unhook the 2 ignition wires from the db37 harness and run it into my ms3x expansion harness under SPARK A and SPARK B. MegaSquirt MS3X Wiring Bundle – 23″ 5 out of 5 $ 29. MegaSquirt MS3X Wiring Harness for full sequential fuel injection and ignition, as well as tons of other I/O (Dual Stage Nitrous, 2nd O2 Sensor, Boost/Launch Control, etc)MegaSquirt MS3X Wiring Harness – 8 feet. Both on the. ) Does not apply to other Megasquirt products or other firmware versions. Megasquirt will support 2 separate injector channels, meaning I need to It seems like you could more accurately emulate. 57 Hardware Guide 1: Introduction The MS3X/V3. MegaSquirt MS3X Wiring Pigtail – Length = 24″. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. This MS330-K kit includes everything you will need to build your MegaSquirt-3. Post by Bahooki » Thu Feb 01, 2018 5:39 pm. 99. 2a. 5 digital input/ output. MegaSquirt MS3X Wiring Bundle - Length = 23" ~23" of TXL High temp automotive grade wire. Anyone onto the questions. Share. one sensor wire is adequate. On the MS3X expansion board, R11 adjusts the threshold voltage, and R32 adjusts the hysteresis level. To pin 30, connect the 12 gauge red wire you ran all the way to the fuel pump. 2. Use the MS3X pull up jumper for the. SAYS IF HALL SENSOR. MS power; I have kept an old 82zxt harness that was in amazing condition and I have been canning parts from it. The harnesses worked out great but what I noticed was that I started soldering and heat shrinking before I had all of the wires ran so I ended up having to unsolder and resolder a couple connections (Especially the Sensor_GND) a couple times and pull loom apart to add another. Re: car wont start with new ms3x. See t. Would 18 gauge be alright to run from the MS. Look foir Pt. 8′ MegaSquirt Wiring Harness for MS3X. SAYS IF HALL SENSOR. It ought to work with a modded V3. 0 is an ECU based on Megasquirt-3 technology, consisting internally of an MS3 card and an MS3X expansion card installed on a through-hole DIY V3. 99. The harnesses worked out great but what I noticed was that I started soldering and heat shrinking before I had all of the wires ran so I. Add to cart. I am now running wasted spark ignition on 6 cylinder BMW M30 engine. 3. Also i a using the newest firmware on the ms3x, I believe it is 1. 6 > 88 Carrera wiring queries. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. 57 board with MS3X board. 8′ of TXL High temp automotive grade wire. 3. This version of the documentation applies to: •. Check Details Part 24: megasquirt ms3-pro. You don't need that ignition module, you ve COP on your car and you need to find a way to ignite your coils with MS3X spark outputs. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. The stock wires might work by just looping the extra length of wire-if you can picture that. 8′ of TXL High temp automotive grade wire. 1 uF capacitor from JS10 to SG or the proto area ground. Top. The versatile MicroSquirt with 30″ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. 57 main board, MS3 daughter card, MS3X, and all the other associated parts. Megasquirt MS3X > 3. Find Parts and Accessories ms3x KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! Get Off-Road With Savings on Select Jeep® Products! Vehicle/Engine Search Vehicle/Engine Search Make/Model SearchI've personally found PWM valves a little easier to configure - you just need to set the frequency (Ford runs theirs at 300 Hz) and adjust the duty cycle until you hit your desired RPM. 6 digital inputs. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. 5″ tall including the mating connectors. Would 18 gauge be alright to run from the MS. In this video the multiversal-timelines become intertwined, the editor screws up and shoulder pads! In all seriousness, I some wha. 00. Location: Va. Skip to content. I have a m50 NON-Vanos motor with a Motronic 3. This is the latest top of the range MegaSquirt ECU – the MegaSquirt 3 (MS3)! This controller is jam-packed with features found on aftermarket engine controllers costing 10X as much, yet is easy to use and configure!. Yeah, you need to test each coil in test mode to make sure they're even wired up correctly. Would 18 gauge be alright to run from the MS. 2a. The crank position input, is has the red wire from point 25 meeting the black from point 8 and then connecting to a blue and yellow wire at the pigtail. Tweet. We are almost done pulling wires in the engine bay at this point. Then I checked from the bulkhead to the Ms, that was good. That is the one part of the harness I did cut, and rewired the IAT wire to the GM sensor I installed in the y-pipe. Pin 9 - Green / White. Had a question about the signal ground to MS3 (Pin B) - I assume since the coil switching is coming from the MS3X board it would be better to ground to this rather than the main board ?. x See the Setting Up manual for more detail on version numbers. You may have to register before you can post: click the register link above to proceed. To make sure you can’t accidentally switch the upper and lower harnesses, the MS3X harness uses a male DB37 connector instead of a female one. Top. AI-enhanced title. 1 Wire and connector choice; 3. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here!Yesterday my wiring harness was finished. 1998-2002 GM LS1 / LS6 Drive by Cable EFI Wiring Harness HAR-1012 LS1 Harness Instructions. . I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. 5 digital input/ output. Bring the e-fan wire (IAC1A) out to the front of the car around the driver side front relays (between the bumper and rad). B1 - ECU Ignition Switch:. 02 with MS3x board on a v3. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. jsimmons Experienced MS/Extra'er Posts: 207 Joined: Thu Jun 11, 2015 6:12 am. I even pulled the Ms out and made sure the jumper was installed for the cam input. Using FIDLE and Idle will certainly be ok with the V3. 2 Soldering or crimping; 3.