No running lights and dash light not working?

1989 BUICK LESABRE

115,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC

TODD BUCKINGHAM

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All blinkers work. Brake lights work. Headlights work. No running lights. I’ve changed the fuse. And still nothing, not sure what else to do. I’ve seen a possible ground being corroded but don’t want to buy a new switch if that’s the case. Thank you in advance.

Aug 17, 2023 at 2:42 PM

STRAILER

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I would check for power with the headlight switch on at the brown wire, if you have power at the fuse but no power at the brown wire the switch is bad. Here are the running light wiring diagrams and two guides to help us fix the problem.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out

Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Aug 18, 2023 at 10:42 AM