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.
Power Circuits
Turn ignition on. Using a voltmeter, backprobe PCM harness connectors. Check for battery voltage between PCM ignition power terminals and ground. See PCM POWER CIRCUIT TERMINALS table. If battery voltage is not present, check IGN fuse and fusible links. If fuse is okay, check for an open in wire between battery and ignition switch, and between ignition switch and PCM terminal. If okay, check for a defective ignition switch.
| Vehicle | PCM Connector | Terminal No. |
|---|---|---|
| Amigo, Rodeo & Trooper (V6) | Blue | F19 |
| Blue | F20 | |
| Blue | F57 | |
| Blue | F75 | |
| Red | S32 | |
| Hombre | C1 | 19 |
| C1 | 20 | |
| C2 | 36 | |
| Except Amigo, Hombre, Rodeo & Trooper (V6) | Red | A4 |
| Blue | E5 | |
| Blue | E16 | |
| Blue | F16 | |
Use the Manual With the Right Hardware
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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.
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