For 1990-2009 cars

## Park Lamps Always On Buick

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Exterior Lights System Check? | -- | Go to Step 2 | Go to Exterior Lights System Check
2 | Disconnect the headlamp switch connector. Do the park lamps go out? | -- | Go to Step 7 | Go to Step 3
3 | Disconnect the remote function actuator (RFA) module connector (with AU0). Do the park lamps go out? | -- | Go to Step 8 | Go to Step 4
4 | Disconnect the lamp control module (LCM) connector C1. Do the park lamps go out? | -- | Go to Step 9 | Go to Step 5
5 | Remove the PARK LP fuse 8C from the IP fuse block. Do the park lamps go out? | -- | Go to Step 12 | Go to Step 6
6 | Repair the short to battery positive voltage (B+) in CKT 9 (BRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
7 | Replace the headlamp switch. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Exterior Lights System Check | --
8 | Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry. Is the repair complete? | -- | Go to Exterior Lights System Check | --
9 | Inspect for a short to ground in CKT 308 (GRY/BLK). Refer to Testing for Short to Ground in Wiring Systems. Is CKT 308 OK? | -- | Go to Step 10 | Go to Step 13
10 | Inspect for a short to ground in CKT (624 (BLK/WHT). Refer to Testing for Short to Ground in Wiring Systems. Is CKT 624 OK? | -- | Go to Step 11 | Go to Step 13
11 | Replace the LCM. Is the repair complete? | -- | Go to Exterior Lights System Check | --
12 | Repair the short to battery positive voltage (B+) in CKT 256 (PPL). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
13 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --

## Park Lamps Always On Oldsmobile

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Exterior Lights System Check? | -- | Go to Step 2 | Go to Exterior Lights System Check
2 | Disconnect the headlamp switch connector. Do the park lamps go out? | -- | Go to Step 8 | Go to Step 3
3 | Remove the park lamp relay position K from the RH IP fuse block. Do the park lamps go out? | -- | Go to Step 9 | Go to Step 4
4 | Disconnect the remote function actuator (RFA) module connector (with T2T). Do the park lamps go out? | -- | Go to Step 12 | Go to Step 5
5 | Disconnect the lamp control module (LCM) connector C1. Do the park lamps go out? | -- | Go to Step 11 | Go to Step 6
6 | Inspect for a short to ground in CKT 624 (BLK/WHT). Refer to Testing for Continuity in Wiring Systems. Is CKT 624 OK? | -- | Go to Step 7 | Go to Step 13
7 | Repair the short to battery positive voltage (B+) in CKT 9 (BRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
8 | Replace the headlamp switch. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Exterior Lights System Check | --
9 | Inspect for a short to battery positive voltage (B+) in CKT 74 (LT BLU). Refer to Testing for Continuity in Wiring Systems. Is CKT 74 OK? | -- | Go to Step 10 | Go to Step 13
10 | Replace the park lamp relay position K in the RH IP fuse block. Is the repair complete? | -- | Go to Exterior Lights System Check | --
11 | Replace the LCM. Is the repair complete? | -- | Go to Exterior Lights System Check | --
12 | Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry. Is the repair complete? | -- | Go to Exterior Lights System Check | --
13 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --

## Park Lamps Always On Pontiac

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Exterior Lights System Check? | -- | Go to Step 2 | Go to Exterior Lights System Check
2 | Disconnect the headlamp switch connector. Do the park lamps go out? | -- | Go to Step 7 | Go to Step 3
3 | Disconnect the remote function actuator (RFA) module connector (with AU0). Do the park lamps go out? | -- | Go to Step 9 | Go to Step 4
4 | Disconnect the lamp control module (LCM) connector C1. Do the park lamps go out? | -- | Go to Step 8 | Go to Step 5
5 | Inspect for a short to ground in CKT 624 (BLK/WHT). Refer to Testing for Short to Ground in Wiring Systems. Is CKT 624 OK? | -- | Go to Step 6 | Go to Step 10
6 | Repair the short to battery positive voltage (B+) in CKT 9 (BRN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --
7 | Replace the headlamp switch. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Exterior Lights System Check | --
8 | Replace the LCM. Is the repair complete? | -- | Go to Exterior Lights System Check | --
9 | Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry. Is the repair complete? | -- | Go to Exterior Lights System Check | --
10 | Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Exterior Lights System Check | --