Backup Lamps Always On. Pontiac Montana 2000

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2000 🢒 Montana 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Backup Lamps Always On

Backup Lamps Always On Domestic

Step	Action	Yes	No
Schematic Reference: Exterior Lights Schematics
1	Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?	Go to Step 2	Go to Symptoms - Lighting Systems
2	Shift the transaxle into the PARK position. Turn the ignition switch to the RUN position. Are the backup lamps illuminated?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Disconnect the transmission range switch connector C1. Are the backup lamps illuminated?	Go to Step 4	Go to Step 5
4	Repair a short to battery voltage on the backup lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 6	--
5	Adjust or replace the transmission range switch. Refer to Park/Neutral Position Switch Adjustment in Automatic Transaxle. Did you complete the repair?	Go to Step 6	--
6	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Backup Lamps Always On Export

Step	Action	Yes	No
Schematic Reference: Exterior Lights Schematics
1	Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?	Go to Step 2	Go to Symptoms - Lighting Systems
2	Shift the transaxle into the PARK position. Turn the ignition switch to the RUN position. Are the backup lamps illuminated?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Disconnect the transmission range switch connector C1. Are the backup lamps illuminated?	Go to Step 4	Go to Step 9
4	Remove the backup lamp relay. Are the backup lamps illuminated?	Go to Step 7	Go to Step 5
5	Probe the control circuit of the backup lamp relay connector with a test lamp that is connected to a known good ground. Does the test lamp illuminate?	Go to Step 6	Go to Step 8
6	Repair a short to battery voltage on the backup lamp relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 10	--
7	Repair a short to battery voltage on the backup lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 10	--
8	Replace the backup lamp relay. Did you complete the repair?	Go to Step 10	--
9	Adjust or replace the transmission range switch. Refer to Park/Neutral Position Switch Adjustment in Automatic Transaxle. Inspect the system. Is the repair complete?	Go to Step 10	--
10	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2