GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Keyless Entry Schematics

1

Did you perform the Remote Keyless Entry Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Remote Keyless Entry

2

Press the panic button on the transmitter.

Does the horn sound and the lights flash?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Did only the headlamps flash?

Go to Step 4

Go to Panic Mode Inoperative

4

  1. Disconnect the Remote Control Door Lock Receiver (RCDLR) module. Refer to Keyless Entry Component Views .
  2. Connect a fused jumper between a good ground and A2 of the RCDLR connector.

Did the horn sound?

Go to Step 6

Go to Step 5

5

Find and repair the open or high resistance in the Horn Relay control circuit 28. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 2

6

Replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement .

Did you complete the replacement?

Go to Step 7

 

7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step  2