Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Fog Lights Schematics | |||
1 | Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Are both rear fog lamps operating properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is only one rear fog lamp inoperative? | Go to Step 12 | Go to Step 4 |
4 | Check for an open in the RR FOG LP Fuse. Is the RR FOG LP Fuse open? | Go to Step 27 | Go to Step 5 |
5 |
Does the test lamp illuminate for both tests? | Go to Step 6 | Go to Step 26 |
6 | Install a fused jumper across the switch side feed circuit and the fog lamps supply voltage circuit of the rear fog lamp relay connector. Refer to Circuit Testing in Wiring Systems. Do the fog lamps illuminate? | Go to Step 7 | Go to Step 15 |
7 | Probe the control circuit of the rear fog lamp relay with a test lamp that is connected to a battery voltage. Does the test lamp illuminate when the fog lamp switch is pressed? | Go to Step 32 | Go to Step 8 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 25 |
9 | Probe the ground circuit of the rear fog lamp module with a test lamp that is connected to battery voltage. Does the test lamp illuminate? | Go to Step 10 | Go to Step 23 |
10 |
Does the test lamp illuminate when the rear fog lamp switch is pressed? | Go to Step 17 | Go to Step 11 |
11 |
Does the test lamp illuminate? | Go to Step 16 | Go to Step 28 |
12 |
Does the test lamp illuminate? | Go to Step 29 | Go to Step 13 |
13 |
Does the test lamp illuminate? | Go to Step 14 | Go to Step 18 |
14 | Using a test lamp, probe between the ground circuit and the fog lamp supply voltage circuit of the inoperative tail lamp connector. Does the test lamp illuminate? | Go to Step 31 | Go to Step 19 |
15 |
Does the test lamp illuminate? | Go to Step 20 | Go to Step 24 |
16 |
Does the test lamp illuminate? | Go to Step 30 | Go to Step 21 |
17 |
Does the test lamp illuminate? | Go to Step 33 | Go to Step 22 |
18 | Repair the open or high resistance in the supply voltage circuit of the inoperative fog lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
19 | Repair the open or high resistance in the ground circuit of the inoperative fog lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
20 | Repair the open or high resistance in the ground circuit of the fog lamps. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
21 | Repair the open or high resistance in the signal circuit of the rear fog lamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
22 | Repair the open or high resistance in the control circuit of the rear fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
23 | Repair the open or high resistance in the ground circuit of the rear fog lamp module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
24 | Repair the open or high resistance in the supply voltage circuit of the fog lamps. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
25 | Repair the open or high resistance in the headlamp switch signal circuit of the rear fog lamp module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
26 | Repair the open or high resistance in the coil feed circuit or the switch side feed circuit of the rear fog lamp relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
27 | Repair the short to ground in the battery positive voltage circuit of the fog lamp relay or the fog lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
28 | Repair the open or high resistance in the rear fog lamp switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
29 | Replace the inoperative rear fog lamp bulb. Refer to Tail Lamp Replacement . Did you complete the replacement? | Go to Step 34 | -- |
30 | Replace the rear fog lamp switch. Refer to Instrument Panel Multifunction Switch Assembly Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 34 | -- |
31 | Replace the tail lamp assemble that houses the inoperative fog lamp. Refer to Tail Lamp Replacement . Did you complete the replacement? | Go to Step 34 | -- |
32 | Replace the rear fog lamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 34 | -- |
33 | Replace the rear fog lamp module. Did you complete the replacement? | Go to Step 34 | -- |
34 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
