Good afternoon,
I attached a wiring diagram for you for the system.
https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out
https://www.2carpros.com/articles/how-to-check-wiring
Verify the fuse has power to both sides with the key on.
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Beyond that, you need to go to the switch and test the wire for power to the dash and tail lights.
https://www.2carpros.com/articles/how-a-headlight-switch-works
Roy
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
1. Disconnect the negative battery cable.
2. Remove the instrument cluster bezel.
3. Disconnect the electrical connectors.
4. Unsnap the switch. Remove the switch.
INSTALLATION PROCEDURE
1. Install the headlamp switch and/or the panel dimmer switch to the bezel.
2. Connect the electrical connectors.
3. Install the bezel to the instrument panel.
4. Connect the negative battery cable.
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Thursday, February 4th, 2021 AT 12:41 PM