Step
| Action
| Value(s)
| Yes
| No
|
1
| Did you perform the Backup Lights Diagnostic System Check?
| --
|
Go to Step 2
| Go to
Backup Lamp System Check
.
|
2
|
- Disconnect the automatic transmission range switch connector.
- Turn on the ignition.
- Use a DMM in order to measure the voltage between terminal D
of the automatic transmission range switch connector and a known good ground.
Does the voltage measure near the specified value?
| B+
|
Go to Step 3
|
Go to Step
4
|
3
|
- Locate an open or a high resistance in CKT X756 and/or
CKT X757.
- Repair the open or the high resistance in CKT X756 and/or
CKT 757.
Did you complete the repair?
| --
|
Go to Step
11
| --
|
4
| Connect a fused jumper wire between terminal D and terminal F
of the automatic transmission range switch connector.
Do the backup lamps illuminate?
| --
|
Go to Step
5
|
Go to Step 6
|
5
| Replace the automatic transmission range switch. Refer to
Manual Shift Shaft Position Switch Replacement
in
Automatic Transmission.
Did you complete the repair?
| --
|
Go to Step
11
| --
|
6
|
- Disconnect the LH and RH backup lamp connector.
- Use the DMM in order to measure the voltage between terminal 2
of the LH and RH backup lamp connector and a known good ground.
Does the voltage measure near the specified value?
| B+
|
Go to Step 8
|
Go to Step
7
|
7
|
- Locate an open or a high resistance in circuits MF1, MF10 and/or
MF757.
- Repair the open or the high resistance in circuits MF1, MF10 and/or
MF757.
Did you complete the repair?
| --
|
Go to Step
11
| --
|
8
| Use the DMM in order to measure the resistance between terminal 1
of the LH and RH backup lamp connector and a known good ground.
Does the resistance measure near the specified value?
| Less than 5 ohms
|
Go to Step 10
|
Go to Step 9
|
9
|
- Locate an open or a high resistance in CKT F1 and/or CKT F2.
- Repair the open or the high resistance in CKT F1 and/or
CKT F2.
Did you complete the repair?
| --
|
Go to Step
11
| --
|
10
| Replace the LH and/or RH backup lamp. Refer
Backup Lamp Bulb Replacement
in Lighting Systems.
Did you complete the repair?
| --
|
Go to Step
11
| --
|
11
|
- Connect all connectors and components that were previously disconnected.
- Verify that the backup lamps operate properly.
Do the backup lamps operate properly?
| --
| Go to
Backup Lamp System Check
.
|
Go to Step
1
|
