For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Remote Keyless Entry System Check? | -- | Go to Step 2 | Go to Remote Keyless Entry System Check
2 | Press the horn pad on the steering wheel. Does the horn sound? | -- | Go to Step 3 | Go to Horns System Check in Horns
3 | Verify the operation of the exterior lights. Do the exterior lights function properly? | -- | Go to Step 4 | Go to Exterior Lights System Check in Lighting Systems
4 | Is the panic function inoperative from both transmitters? | -- | Go to Step 5 | Go to Step 11
5 | Are only the horns inoperative when the panic function is active? | -- | Go to Step 6 | Go to Step 8
6 | Inspect CKT 28 (BLK) for an open between the RFA module and the horn relay. Was an open found? | -- | Go to Step 7 | Go to Step 12
7 | Repair the open in CKT 28 (BLK). Is the repair complete? | -- | Go to Step 13 | --
8 | Are only the exterior lights inoperative when the panic function is active? | -- | Go to Step 9 | Go to Step 12
9 | Inspect CKT 624 (BLK/WHT) for an open between the RFA module and the lamp control module (LCM). Was an open found? | -- | Go to Step 10 | Go to Step 12
10 | Repair the open in CKT 624 (BLK/WHT). Is the repair complete? | -- | Go to Step 13 | --
11 | Replace the transmitter. Refer to Transmitter Programming . Is the repair complete? | -- | Go to Step 13 |
12 | Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement . Is the repair complete? | -- | Go to Step 13 |
13 |

1. Ensure that any components removed during diagnosis are installed.
2. Ensure that all of the connectors are connected.

Is the repair complete?

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Go to Remote Keyless Entry System Check

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