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.
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HOMESERVICE MANUALSMERCURY1991COUGAR LS, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 3.8LTEST T - AXODE TRANSAXLETEST PIN IDENTIFICATIONNOTES
1991 Mercury Cougar LS, 3.8 4
Test Pin Identification: Notes
1991 Mercury Cougar LS, 3.8 4SECTION Notes
3.8L SPFI-MA (FWD AXODE) TEST PIN WIRE COLOR I.D.
| Application | Wire Color | |
|---|---|---|
| Pin 5 (TSS) | ||
| Continental | Dark Green/White | |
| Sable & Taurus | Gray/Black | |
| Pin 30 (MLPS) | Light Blue/Yellow | |
| Pin 37 (VPWR) | Red | |
| Pin 38 (EPC) | White/Yellow | |
| Pin 40 (PWR GND) | Black/Light Green | |
| Pin 46 (SIG RTN) | Gray/Red | |
| Pin 49 (TOT) | Orange/Black | |
| Pin 51 (SS-1) | Orange/Yellow | |
| Pin 52 (SS-2) | Pink/Orange | |
| Pin 53 (LUS) (MLUS on Continental) | Tan/White | |
| Pin 55 (SS-3) | ||
| Continental | Pink/Black | |
| Sable & Taurus | White/Red | |
| Pin 57 (VPWR) | Red | |
| Pin 60 (PWR GND) | Black/Light Green | |
RENDER: 1.0x
NO RELATED
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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.