Defoggers and Heated Mirrors Inoperative. Opel Sintra 1999

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the defogger system check performed? | -- | Go to Step 2 | Go to Defogger System Check

2

1. Turn the ignition switch on.
2. Check the REAR DEFOG fuse and the HVAC/DRL fuse.

Are the REAR DEFOG fuse and the HVAC/DRL fuse OK?

--

Go to Step 3

Go to Step 5

3 | Turn on the rear defogger switch. Does the rear defogger indicator lamp turn on? | -- | Go to Step 7 | Go to Step 4
4 | Replace the heater-A/C control. Control Assembly Replacement Is the repair complete? | -- | Go to Defogger System Check | --
5 | Is the HVAC/DRL fuse open? | -- | Go to Step 21 | Go to Step 6
6 | Is the REAR DEFOG fuse open? | -- | Go to Step 14 | Go to Step 7
7 | Using a test light, connect by backprobing between the rear window defogger connector terminal C1 and ground. Is the test light on? | -- | Go to Step 8 | Go to Step 13

8

1. If the rear defogger indicator lamp turns off before test is made, press and release the rear defogger switch again.
2. Using a test light, connect by backprobing between the rear window defogger relay connector terminal B5 and ground.

Is the test light on?

--

Go to Step 9

Go to Step 15

9 | Using a test light connected to ground, check for power at the HEATED MIRROR fuse. Is there power at the HEATED MIRROR fuse? | -- | Go to Step 10 | Go to Step 18

10

1. If the rear defogger indicator lamp turns off before test is made, press and release the rear defogger switch again.
2. Using a test light, connect by backprobing between either outside rearview mirror connector terminal D and ground.

Is the test light on?

--

Go to Step 11

Go to Step 19

11 | Using a test light, connect between B+ and the outside rearview mirror connector terminal F by backprobing. Is the test light on? | -- | Go to Step 12 | Go to Step 20
12 | Replace the inoperative outside rearview mirror. Inside Rearview Mirror Replacement Is the repair complete? | -- | Go to Defogger System Check | --
13 | Repair poor connection or open in CKT 1040. Is the repair complete? | -- | Go to Defogger System Check | --
14 | Repair short to ground in CKT 1040 and/or CKT 293. Is the repair complete? | -- | Go to Defogger System Check | --

15

1. Remove the REAR DEFOG fuse.
2. Using a DMM set to measure resistance, connect by backprobing between the rear window defogger relay connector terminals B5 and C7.
3. Make sure the ignition switch is on.
4. While observing the DMM, press and release several times the rear defogger switch.

When cycling the rear defogger switch, does the DMM display a change of resistance between ∞ (OL) and less than 2ohms?

--

Go to Step 17

Go to Step 16

16 | Replace the rear window defogger relay. Rear Window Defogger Relay Replacement Is the repair complete? | -- | Go to Defogger System Check | --
17 | Check for poor connection or open at the rear window defogger relay terminals B5 and/or C7 and repair as needed. Is the repair complete? | -- | Go to Defogger System Check | --
18 | Repair poor connection or open in CKT 293 between S275 and the HEATED MIRROR fuse block terminal A9. Is the repair complete? | -- | Go to Defogger System Check | --
19 | Repair poor connection or open in CKT 267 between C200 terminal C4 and the inoperative outside rearview mirror. Is the repair complete? | -- | Go to Defogger System Check | --
20 | Repair poor connection or open in CKT 750. Is the repair complete? | -- | Go to Defogger System Check | --
21 | Repair short to ground in CKT 241. Is the repair complete? | -- | Go to Defogger System Check | --