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Symptom: *FOG LAMPS WILL NOT TURN OFF POSSIBLE CAUSES FOG LAMP SWITCH SENSE CIRCUIT OPEN HEADLAMP SWITCH FOG LAMP RELAY OUTPUT CIRCUIT SHORT TO VOLTAGE CENTRAL TIMER MODULE FOG LAMP RELAY TEST ACTION APPLICABILITY 1 Turn the ignition off. All Yes → No → Repair the Fog Lamp Switch Sense Circuit for an open. 2 Turn the Headlamp Switch to the off position. t, read the Headlamp Switch Voltage. Does the DRBIII t display voltage between 4.3 and 4.8 volts? All Yes → No → Replace the Headlamp Switch. 3 Remove the Fog Lamp Relay from the PDC. All Yes → No → Repair the Fog Lamp Relay Output Circuit for a short to voltage. 4 Reinstall the Fog Lamp Relay. All Yes → Replace the Central Timer Module. No → Replace the Fog Lamp Relay. 177 EXTERIOR LIGHTING |