GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Astro - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Backup Lamps Inoperative

Backup Lamps Inoperative Non VE1

Step

Action

Value(s)

Yes

No

1

Did you perform the Backup Lights System Check?

--

Go to Step 2

Go to Backup Lamp System Check

2
  1. Disconnect the park/neutral position and backup lamp switch.
  2. Place the ignition switch in the RUN position.
  3. Connect a test lampJ 35616-200 from CKT 139 (PNK) cavity C2 at the park/neutral position and backup lamp switch to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

Connect a fused jumper between CKT 139 (PNK) cavity C and CKT 24 (LT GRN) cavity F of the park/neutral position and backup lamp switch connector C2.

Does the backup lamp light?

--

Go to Step 5

Go to Step 7

4

Repair the open in CKT 139 (PNK) between the instrument panel fuse block and the park/neutral position and backup lamp switch.

Is the repair complete?

--

Go to Backup Lamp System Check

--

5

Inspect the adjustment of the park/neutral position and backup lamp switch.

Is the adjustment proper?

--

Go to Step 6

Go to Step 8

6

Replace the park/neutral position and backup lamp switch. Refer to Park/Neutral Position Switch Replacement in Transmission.

Is the replacement complete?

--

Go to Backup Lamp System Check

--

7

Repair the open in CKT 24 (LT GRN) between the park/neutral position and backup lamp switch and splice S321.

Is the repair complete?

--

Go to Backup Lamp System Check

--

8

Adjust the park/neutral position and the backup lamp switch. Refer to Park/Neutral Position Switch Adjustment .

Is the repair complete?

--

Go to Backup Lamp System Check

--

Backup Lamps Inoperative VE1

Step

Action

Value(s)

Yes

No

1
  1. Disconnect Park/Neutral Position and Backup Lamp Switch C2 Connector.
  2. Place Ignition Switch in the RUN position.
  3. Connect a test lamp from Park/Neutral Position and Backup Lamp Swithc PNK (139) wire cavity C to ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 6

2

Connect a fused jumper between PNK (139) wire cavity C and LT GRN (24) wire cavity F of the Park/Neutral Position and Backup Lamp Switch Connector C2.

Does the Backup Lamps light?

--

Go to Step 7

Go to Step 3

3
  1. Reconnect the Park/Neutral Position and Backup Lamp Switch.
  2. Disconnect Backup Lamp Connector C355.
  3. Connect a test lamp from Backup Lamp Connector LT GRN (24) wire cavity A to ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 8

4
  1. Reconnect Backup Lamp Connector C355.
  2. Connect a test lamp from S410 to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 9

5

Connect a test lamp from S410 to S411.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

6

Locate and repair open in PNK (139) wire between I/P Fuse Block and Park /Neutral Position and Backup Lamp Switch.

Is the repair complete?

--

Go to Backup Lamp System Check

--

7

Check adjustment of Park/Neutral Position and Backup Lamp Switch. If OK, replace Switch.

Is the repair complete?

--

Go to Backup Lamp System Check

--

8

Locate and repair open in LT GRN (24) wire between Backup Lamp Connector C355 and the Park/Neutral Position and Backup Lamp Switch.

Is the repair complete?

--

Go to Backup Lamp System Check

--

9

Locate and repair open in LT GRN (24) wire between S410 and C355.

Is the repair complete?

--

Go to Backup Lamp System Check

--

10

Locate and repair poor or corroded connections at S410 and S411.

Is the repair complete?

--

Go to Backup Lamp System Check

--

11

Locate and repair open in BLK (150) wire between S411 and C355 or BLK (550) wire between C355 and S117.

Is the repair complete?

--

Go to Backup Lamp System Check

--