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 (Discovery)
Turn ignition on. Using a backprobe set, measure voltage between ground and ECM Black 18-pin connector terminal No. 8 (White/Green wire). See WIRING DIAGRAMS . If battery voltage does not exist, check fuse No. 3 (20-amp), located in satellite fuse box No. 1. If fuse is okay, check for an open in suspect circuit between fuse box and ECM. If fuse is not okay, repair short in suspect circuit and replace fuse. See WIRING DIAGRAMS .
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.
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