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Megasquirt automotive harness with commercial connectors.

Overview

Megasquirt Universal Harness designed to V3 and V3.57 board

The wires are Ford/Chrysler automotive specs.

This harness included
- 8 foot Harness : 14 pins input cable and 16 pins output cable.
- Extra wiring:12V injectors power, sensors ground, input outputs spare wires
- Spare pins will allows you to add more wires than the original design.

Outputs:
-4 injector driver wires #18 AWG
-4 coils wires (2 more spare left) #18 AWG
-4 pins IAC wires #18 AWG ; You are free to insert those
spare lines to the commercial input connector.
-1 PWM Idle control wire can be use for any PWM output #18 AWG yellow
-1 fuel pump relay wire #18 AWG green/Dark green
55$us/ 8foot. 1, 4, 10foot Available
Inputs:
-Sensors (5):CLT, IAT, O2, TPS #20 AWG
-Sensor ground wire #20 AWG
-Main ground wire #16 AWG
-+12V ECUl wire #18 AWG
-+5V (TPS) wire #20 AWG
- Spare 1 - Spare 4 wires #20 AWG ; You are free to insert
those spare lines to the commercial input connector.
-VR+ (Hall+) Tach sheiled cable
-VR- and shield (Hall com) Tach sheiled cable

The pinout sticker on the cover help you to see your wires. The wires are color coded and striped to identify output number.

- External wiring for adaptor board v1.00

Pin description(pdf)

Connector A INPUTS

Connector B OUTPUTS

1. Ground (shield)
2. Tach- gnd, VR-, Hall-
3. Tach+, VR/Hall + , white, gray shielded cable.
4. O2(EGO) -light blue
5. TPS - gray/blue - TPS signal(center pin)
6. CLT - yellow - coolant temp sensor
7. IAT - orange - Air intake temp sensor
8. 12V switched from ignition
9. 5V Hall Vcc ,TPS Vref. -gray/red
10. Spare4 (Boot)
11. Spare3
12. Spare2
13. Spare1
14. Ground sensors , TPS, CLT, IAT

1. Idle or Boost PWM (Default SparkA Q16 output pin =#37 DB-37))
2. Fuel pump relay -green/Dark green
3. INJ. 3 -blue/light green, injector driver2
4. INJ. 2 -blue/light green, injector driver2
5. INJ. 4 -blue/light blue, injector driver1
6. INJ. 1 -blue/light blue, injector driver1
7. Ground main
8. Ground main
9. SparkA/spare -white/black :option
10. SparkB/spare -white/2black :option
11. SparkC/spare -white/3black :option
12. SparkD/spare -white (yellow if Fidle)
13. x14 -green - IAC2B / spare :option
14. x13 -green/3orange -IAC2A / spare :option
15. x12 -green/2orange -IAC1 /spare :option
16. x11 -green/orange - IAC1A/spare :option

ECU front view (colored view)

Please Note the pin description is a general setup and may differ from your harness. Depend of you output and input options.