Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1992 Saturn SL AutomaticFACTORY OEM SERVICE PROCEDURE
A/C Compressor Operates All The Time
- Replace A/C control relay with known good unit. Check A/C compressor operation. If A/C compressor continues to operate, disconnect connector at underhood junction block that contains Dark Blue wire from PCM. Turn ignition on. If A/C compressor stops operation, check for short to ground in Dark Blue wire from PCM to underhood junction block.
- If compressor still operates, check for short to power in Dark Green wire from underhood junction block to A/C compressor clutch. Repair wire as necessary. If no short is detected, replace A/C compressor clutch.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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