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**dmjlambert** · 12-20-2023, 08:02 PM

I agree. Check fuses. Also you can try grounding the front parking light housings better, use a test wire attached to a good ground and touch it to the housing and see if the light comes on. Or use a lighted test probe to check for voltage on the wire that is entering the front parking light housings. Parking light wire should be purple. Some year trucks, probably earlier than your truck, the parking light turns off with the headlights on. So, you didn't do anything such as swap out the headlight switch for one that may be for an earlier year did you?

12-20-2023, 08:02 PM	#3
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 4,051	Re: Marker lights vs headlights ..... I agree. Check fuses. Also you can try grounding the front parking light housings better, use a test wire attached to a good ground and touch it to the housing and see if the light comes on. Or use a lighted test probe to check for voltage on the wire that is entering the front parking light housings. Parking light wire should be purple. Some year trucks, probably earlier than your truck, the parking light turns off with the headlights on. So, you didn't do anything such as swap out the headlight switch for one that may be for an earlier year did you?