Backup Lamps Inoperative Regal
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||||||||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |||||||
2 |
Do the both backup lamps turn on? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Is only one backup lamp inoperative? | Go to Step 8 | Go to Step 4 | ||||||
4 |
Do the backup lamps illuminate when commanded by the Body Control Module (BCM)? | Go to Step 5 | Go to Step 6 | ||||||
5 | Insure that the park/neutral position switch is functioning properly. Refer to Diagnostic Starting Point - Automatic Transmission in Automatic Transaxle-4T65-E. Is the park/neutral position switch functioning properly? | Go to Step 12 | Go to Park/Neutral Position Switch Replacement in Automatic Transaxle-4T65-E | ||||||
6 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 14 | ||||||
7 | Install a fused jumper across the switch side battery positive voltage feed circuit of the backup lamp relay and the backup lamp supply voltage circuit of the backup lamp relay. Do the backup lamps turn on? | Go to Step 13 | Go to Step 10 | ||||||
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 15 | ||||||
9 | Connect a test lamp between the ground circuit and supply voltage circuit of the inoperative backup lamp. Does the test lamp illuminate? | Go to Step 11 | Go to Step 16 | ||||||
10 | Test for a high resistance or an open in the backup lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 17 | ||||||
11 | Inspect for poor connections at the harness connector of the inoperative backup lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 18 | ||||||
12 | Inspect for poor connections at the harness connector of the Body Control Module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 19 | ||||||
13 | Inspect for poor connections at the harness connector of the backup lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 20 | ||||||
14 | Repair a high resistance or an open in the switch side battery positive voltage supply circuit of the backup lamp relay . Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||||
15 | Repair a high resistance or an open in the backup lamp supply voltage circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||||
16 | Repair a high resistance or an open in the backup lamp ground circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||||
17 | Repair a high resistance or an open in the backup lamps ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||||
18 | Replace the inoperative backup lamp. Refer to Tail Lamp Assembly and /or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement . Did you complete the repair? | Go to Step 21 | -- | ||||||
19 |
Important: Perform the set up procedures for the Body Control Module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Park/Neutral Position Switch Adjustment in Body Control System. Did you complete the repair? | Go to Step 21 | -- | ||||||
20 | Replace the backup lamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- | ||||||
21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||||
Backup Lamps Inoperative Century
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics | |||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |
2 |
Do the both backup lamps turn on? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is only one backup lamp inoperative? | Go to Step 7 | Go to Step 4 |
4 | Check the R/CMPT fuse for an open. Is the R/CMPT fuse open? | Go to Step 12 | Go to Step 5 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 13 |
6 | Install a fused jumper across the battery positive voltage feed and the backup lamp supply voltage circuit of the park/neutral position switch. Do the backup lamps turn on? | Go to Step 11 | Go to Step 9 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 14 |
8 | Connect a test lamp between the ground circuit and supply voltage circuit of the inoperative backup lamp. Does the test lamp illuminate? | Go to Step 10 | Go to Step 15 |
9 | Test for a high resistance or an open in the backup lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 16 |
10 | Inspect for poor connections at the harness connector of the inoperative backup lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 17 |
11 | Inspect for poor connections at the harness connector of the park/neutral position switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 18 |
12 | Repair a short to ground in the backup lamps supply voltage circuit or the park/neutral position switch positive voltage feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | -- |
13 | Repair a high resistance or an open in the park/neutral position switch battery positive voltage feed. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | -- |
14 | Repair a high resistance or an open in the backup lamp supply voltage circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | -- |
15 | Repair a high resistance or an open in the backup lamp ground circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | -- |
16 | Repair a high resistance or an open in the backup lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 19 | -- |
17 | Replace the inoperative backup lamp. Refer to Tail Lamp Assembly and /or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement . Did you complete the repair? | Go to Step 19 | -- |
18 | Adjust or replace the park/neutral position switch. Refer to Park/Neutral Position Switch Adjustment in Automatic Transaxle-4T65-E. Did you complete the repair? | Go to Step 19 | -- |
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
