Powertrain Management: Service Precautions

Need a step-by-step guide?

Get an AI-powered repair guide with parts lists, cost estimates, and clear instructions for your 1999 Ford.

1. Disconnect battery ground cable prior to service or replacement of electronic engine controls.
2. Follow diagnostic procedures as presented.
3. Disconnect electronic engine controls from wire harness before measuring for continuity, resistance or energizing with a 12-volt source.
4. Never measure voltage or resistance directly at the Powertrain Control Module (PCM).

← Back to Powertrain Management All Makes