Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Aids
Perform this test only when instructed by QUICK TEST, or when directed by TEST A, TEST C, TEST DC, TEST PA or TEST PB.
This test is intended to diagnose only the following systems or components:
- IRCM (Battery voltage and all relays)
- Harness circuits (VBAT, VPWR, Key PWR, PWR GND, EDF circuit, FP circuit, HEDF circuit, A/C circuit and WAC circuit)
- ECA
- A/C Demand Switch Input
To prevent replacing good components, be aware that the following non-EEC related components or systems may be at fault:
- Fuel lines or fuel filters
- Contaminated fuel
- Ignition switch, battery cables and ground straps
- Fuel pump
- Alternator and voltage regulator
- A/C clutch or A/C demand switch
- Cooling fan motor
| Application | Wire Color | |
|---|---|---|
| Pin 1 (PT/EDF) | Brown/Orange | |
| Pin 2 (PT/EDF) | Brown/Orange | |
| Pin 3 (PTF) | Black/Orange | |
| Pin 4 (PTF) | Black/Orange | |
| Pin 5 (PTP) | Pink/Black | |
| Pin 6 (PT/HEDF) | Dark Blue | |
| Pin 7 (PT/HEDF) | Dark Blue | |
| Pin 8 (BATT +) | Yellow | |
| Pin 12 (PT/FPR) | Black/Orange | |
| Pin 13 (KEY PWR) | Red/Light Green | |
| Pin 14 (EDF) | Tan/Orange | |
| Pin 15 (PWR GND) | Black/Light Green | |
| Pin 16 (PWR GND) | Gray/White | |
| Pin 17 (HEDF) | Light Green/Purple | |
| Pin 18 (FP) | Tan/Light Green | |
| Pin 21 (ACCS) | ||
| Continental | Purple | |
| Sable & Taurus | Light Green/Purple | |
| Pin 22 (WAC) | Pink/Yellow | |
| Pin 23 (PTAC) | Black/Yellow | |
| Pin 24 (VPWR) | Red | |
| Application | Wire Color |
|---|---|
| Pin 1 (PT/EDF) | Brown/Yellow |
| Pin 2 (PT/EDF) | Brown/Yellow |
| Pin 3 (PTF) | Black/Orange |
| Pin 4 (PTF) | Black/Orange |
| Pin 6 (PT/HEDF) | Brown/Orange |
| Pin 7 (PT/HEDF) | Black/Orange |
| Pin 8 (BATT +) | Yellow |
| Pin 12 (PT/FPR) | Black/Yellow |
| Pin 13 (KEY PWR) | Red/Light Green |
| Pin 14 (EDF) | Tan/Orange |
| Pin 15 (PWR GND) | Black |
| Pin 16 (PWR GND) | Gray/White |
| Pin 17 (HEDF) | Pink/Light Blue |
| Pin 18 (FP) | Tan/Light Green |
| Pin 21 (ACCS) | Pink/Light Blue |
| Pin 22 (WAC) | Red |
| Pin 23 (PTAC) | Black/Yellow |
| Pin 24 (VPWR) | Red |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.