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Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 1513
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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92 sedan diville oil light stays on wiyh key removed

Customer Question

92 sedan diville oil light stays on wiyh key removed
Submitted: 5 months ago.
Category: Cadillac
Expert:  Juan Crespo replied 5 months ago.

Hi there.

Is the cluster digital or standard analog?

Customer: replied 5 months ago.
cluster is digital light will stay off with oil pressure unpluged
Expert:  Juan Crespo replied 5 months ago.

Thank you for that information.

The oil stays on due to a short to ground on the circuit (Tan wire) that goes from the pressure switch to the warning lamp in the instrument cluster.

With the oil pressure switch unplugged, remove the cluster and disconnect the Purple connector, then check continuity to ground from pin 18 (Tan wire). If there is continuity to ground, the circuit is shorted between the connector and the pressure switch. If there is no continuity, the short is internal to the cluster - meaning the cluster needs to be repaired or replaced.