GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Firebird 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Step

Action

Value(s)

Yes

No

Important: Verify that the arming verification feature of the theft deterrent system is enabled prior to performing this diagnostic. Refer to Feature Customization .

1
  1. Remove the theft deterrent relay.
  2. Connect a test lamp between the theft deterrent relay terminal C1 and ground.

Does the test lamp light?

--

Go to Step 2

Go to Step 8

2
  1. Connect a test lamp between the theft deterrent relay terminal C1 and terminal A1
  2. While observing the test lamp, press the lock button on the remote control door lock transmitter.

Does the lamp light?

--

Go to Step 3

Go to Step 9

3

Connect a test lamp the theft deterrent relay connector terminal C2 and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 6

4
  1. Connect a test lamp the theft deterrent relay connector terminal A2 and ground.
  2. Turn on the park lamps.

Does the test lamp light?

--

Go to Step 5

Go to Step 7

5
  1. Test for a poor connection at the theft deterrent relay connector terminal A2.
  2. If the connection is OK, replace the theft deterrent relay.

Is the repair complete?

--

System OK

--

6

Repair the open in circuit 640 between S211 and the theft deterrent relay connector terminal C2.

Is the repair complete?

--

System OK

--

7

Repair the open in circuit 9 between S226 and the theft deterrent relay connector terminal A2.

Is the theft deterrent relay?

--

System OK

--

8

Repair the open in circuit 640 between S211 and the theft deterrent relay connector terminal C1.

Is the repair complete?

--

System OK

--

9
  1. Leave the test lamp connected to theft deterrent relay connector terminal C1.
  2. Backprobe the body control module (BCM) connector terminal C8.
  3. While observing the test lamp, press the lock button on the remote control door lock transmitter.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

10

Repair the open in circuit 624 between the theft deterrent relay terminal A1 and the BCM connector C3 terminal C8.

Is the repair complete?

--

System OK

--

11
  1. Check for a poor connection at BCM connector C3 terminal C8.
  2. If the connection is OK, replace the BCM. Refer to Body Control Module Replacement .

Is the repair complete?

--

System OK

--