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Manuals through 2025 now available!

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Component Tests and General Diagnostics

POWERTRAIN CONTROL MODULE (PCM) POWER RELAY

NOTE: The IGN START/RUN and ground circuits, or the B+ and VPWR circuits may be reversed in the harness connector. Refer to the Wiring Diagrams for schematic and connector information.

POSSIBLE CAUSE
- Harness circuits: B+, IGN START/RUN, INJPWRM, ISP-R, PCMRC, VPWR and GND
- PCM power relay
- PCM






Injector (INJ) Connector

Step 1:






Powertrain Control Module Power (PCM Power) Relay Connector


Step 1-Step 6:




Step 7-Step 11:




Step 20: