Hi everyone. looking for more places to look to fix my lumina overheating problem. I'll start with the basics. Coolent is full, thermostat is working waterpump is working. The electric fans and A/C pump clutch are not engaging. All 3 relays are good, fuses are good. There is power to both the relays and fuses. If you jump the relays everything works. According to the Scan Tool the temp sensor is working accuratly. (no codes) I'm also getting the signal that the A/C is on with the dash switch, but the clutch will not engage. Internal ECM looks intact with no burn circuits. Seems as though the signal is not making it from the ECM to the relays. Wiring is not cut and has continuity. Please help with any info.
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09-03-2005, 11:57 AM
