Ignition Relay Circuit (5.7L - "F" Body)
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn SL2, 2002 Saturn SL1, 2002 Saturn SL, 2002 Saturn SC2, and 2002 Saturn SC1. However, it is still accessible from the selected car via links, so may be relevant.
- If diagnostic system check has already been performed, go to next step. If diagnostic system check has not been performed, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS in appropriate SELF-DIAGNOSTICS article.
- Turn ignition off. Remove IGN relay from underhood electrical center. Using test light connected to ground, probe battery feed circuit at IGN relay cavity. If test light illuminates, go to next step. If test light does not illuminate, go to step 8.
- Turn ignition on. Using test light connected to ground, probe ignition feed circuit at IGN relay cavity. If test light illuminates, go to next step. If test light does not illuminate, go to step 9.
- Turn ignition off. Measure resistance between chassis ground and ground circuit at IGN relay cavity. If resistance is less than 2 ohms, go to next step. If resistance is not less than 2 ohms, go to step 10.
- Turn ignition off. Connect fused jumper wire between IGN relay battery feed circuit and IGN relay load circuit at relay cavities. Using test light connected to ground, probe terminals of the following fuses located in underhood electrical center No. 2:
- A/C CRUISE
- ENG CTRL
- ENG SEN
- INJR1
- INJR2
If test light illuminates for all fuses, go to next step. If test light does not illuminate, go to step 11.
- Check for poor terminal connection at IGN relay. Repair as necessary. If connections are okay, go to next step.
- Replace IGN relay.
- Repair open in IGN relay battery feed circuit.
- Repair IGN relay ignition feed circuit.
- Repair open or high resistance in IGN relay ground circuit.
- Repair IGN relay load circuit.