There are just (3) possible reasons for this:
(a) your headlight switch has failed, or
(b) your headlight relay has failed.
(c) Fuse 1 (25 Amps) has blown
The headlight relay and fuse 1 are located (I think) in a fuse/relay block under the hood.
The headlight switch is part of the "Multi-function Switch" on the steering column.
Here's how to replace the 2001 PT Cruiser multi-function switch:
Multi-Function Switch Removal & Installation
1. Open the hood.
2. Disconnect and isolate the battery negative cable.
3. Remove both upper and lower steering column shrouds.
4. Disconnect both posi-lock harness connectors at the rear of the multi-function switch.
5. Remove multi-function switch mounting screws and remove switch from vehicle.
To Install the new multi-function switch:
Note:
If replacing the multi-function switch, the combination flasher and windshield wiper/washer switch
must be transferred to the new multi-function switch.
1. Remove the two Torx(R) screws retaining the wiper/washer switch, place next to the new
multi-function switch and install two screws.
2. Place switch into place and install mounting screws. Torque multi-function switch to column
retaining screws to 27 inch-lbs. (3 Nm).
3. Connect both posi-lock harness connectors at the rear of the multi-function switch.
4. Install both upper and lower steering column shrouds.
5. Connect the battery negative cable.
6. Close hood.
7. Verify vehicle and system operation.
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