Ignition Relay Circuit (5.7L - "Y" 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.
- Using test light connected to battery voltage, probe IGN relay ground circuit at relay cavity. If test light illuminates, go to next step. If test light does not illuminate, 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:
- A/C
- ENG IGN1
- INJR1
- INJR2
- THROT CONT
If test light illuminates for all fuses, go to next step. If test light does not illuminate, go to step 11.
- Check for poor IGN relay connections. If poor connections are found, go to step 11. 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 in IGN relay ground circuit.
- Replace underhood electrical center.