Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Was the defogger system check performed? | -- | Go to Step 2 | Go to Defogger System Check | ||||
2 |
Is the defogger indicator lamp on? | -- | Go to Step 3 | Go to Step 13 | ||||
3 | Using a test light, backprobe between the rear window defogger relay connector terminal C7 and ground. Is the test light on? | -- | Go to Step 8 | Go to Step 10 | ||||
4 |
Is the test light on? | -- | Go to Step 5 | Go to Step 7 | ||||
5 | Repair the rear defogger grid. Refer to Grid Line Repair . Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
6 |
Is the test light on? | -- | Go to Step 4 | Go to Step 9 | ||||
7 | Repair poor connection or open in CKT 450 between the rear defogger grid and G401. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
8 | Using a test light, backprobe between the rear window defogger relay connector terminal B5 and ground. Is the test light on? | -- | Go to Step 6 | Go to Step 16 | ||||
9 | Repair poor connection or open in CKT 293 between the rear window defogger relay connector terminal B5 and the rear defogger grid. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
10 | Check the REAR DEFOG fuse. Is the fuse open? | -- | Go to Step 11 | Go to Step 12 | ||||
11 | Repair short to ground in CKT 293 or CKT 1040. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
12 | Repair poor connection or open in CKT 1040. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
13 | Using a test light, backprobe between the rear window defogger relay connector terminal B7 and ground. Is the test light on? | -- | Go to Step 14 | Go to Step 17 | ||||
14 |
When cycling the rear defogger switch, does the DMM measure a voltage between B+ and 0.5V (or less)? | -- | Go to Step 15 | Go to Step 20 | ||||
15 | Replace the A/C-heater control. Control Assembly Replacement Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
16 | Replace the rear window defogger relay. Rear Window Defogger Relay Replacement Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
17 | Check the HVAC/DIC/DRL/HEATED SEAT fuse. Is the fuse open? | -- | Go to Step 18 | Go to Step 19 | ||||
18 | Repair short to ground in CKT 241. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
19 | Repair poor connection or open in CKT 241. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
20 | Does the DMM remain reading B+ (10-14V)? | -- | Go to Step 21 | Go to Step 25 | ||||
21 | Check for a poor connection or open in CKT 193. Is there a poor connection or open in CKT 193? | -- | Go to Step 22 | Go to Step 23 | ||||
22 | Repair poor connection or open in CKT 193. Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
23 | Using a test light connected to B+, backprobe the A/C-heater control:
is the test light on? | -- | Go to Step 15 | Go to Step 24 | ||||
24 | Repair poor connection or open in CKT 150 (w/C67) or CKT 850 (w/o C67). Is the repair complete? | -- | Go to Defogger System Check | -- | ||||
25 | Does the DMM remain at 0.5V, or less? | -- | Go to Step 26 | Go to Step 23 | ||||
26 | Check for a short to ground in CKT 193. Is there a short to ground in CKT 193? | -- | Go to Step 27 | Go to Step 15 | ||||
27 | Repair short to ground in CKT 193. Is the repair complete? | -- | Go to Defogger System Check | -- |
