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.
1991 Cadillac Seville BaseFACTORY OEM SERVICE PROCEDURE
Window Control Switch
- Connect test light between Pink wire in switch connector and ground. If light comes on, go to next step. If light does not come on, check for open in power feed wire.
- With harness connected to window control switch, connect (backprobe) test light between ground and terminal "C" of power window switch. Operate switch in up position. Connect test light (backprobe) between ground and terminal "D" of power window switch. Operate switch to down position. If test light comes on in both positions, test power window motor. See WINDOW MOTOR . If test light does not come on in both positions, replace power window control switch.
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.