Headlight/parking lights not working.

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Mh91344

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Location
North Carolina
First Name
Mike
Truck Year
1986
Truck Model
K20 Custom
Engine Size
350
I have a 1986 K20 custom, my headlights parking lights and interior lights are not working. I have replaced the headlight switch and the alternator, because I thought it was going bad but tested out good. My blinkers and hazards work, I know they are on a different circuit. I’m kind of at a lose of where to go from here now. Any help would be great, thanks.


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Chevyguy

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Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
I have a 1986 K20 custom, my headlights parking lights and interior lights are not working. I have replaced the headlight switch and the alternator, because I thought it was going bad but tested out good. My blinkers and hazards work, I know they are on a different circuit. I’m kind of at a lose of where to go from here now. Any help would be great, thanks.


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Have you checked your fuses?.

Clayton

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Chevyguy

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Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
I have a 1986 K20 custom, my headlights parking lights and interior lights are not working. I have replaced the headlight switch and the alternator, because I thought it was going bad but tested out good. My blinkers and hazards work, I know they are on a different circuit. I’m kind of at a lose of where to go from here now. Any help would be great, thanks.


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Have you checked your fuses?.

Clayton

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Chevyguy

Full Access Member
Joined
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Posts
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Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
I have a 1986 K20 custom, my headlights parking lights and interior lights are not working. I have replaced the headlight switch and the alternator, because I thought it was going bad but tested out good. My blinkers and hazards work, I know they are on a different circuit. I’m kind of at a lose of where to go from here now. Any help would be great, thanks.


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Have you checked your fuses?.

Clayton

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Mh91344

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Location
North Carolina
First Name
Mike
Truck Year
1986
Truck Model
K20 Custom
Engine Size
350
I have checked all the fuses and they are good. I’m thinking I have a bad ground somewhere, is there a ground under the dash?


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Matt69olds

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GMC 1/2 ton
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Pull the headlight switch connector. Check for power on the red wire. If you have no power, you may have a fusible link blown. I don’t have a wiring diagram handy, I can’t remember where the taillight circuit gets power
 

Mh91344

Junior Member
Joined
Jun 16, 2019
Posts
6
Reaction score
0
Location
North Carolina
First Name
Mike
Truck Year
1986
Truck Model
K20 Custom
Engine Size
350
Pulled the switch and I’m getting no power to the red wire. Time to track down a blown fuse able link I guess.


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