Lights

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kr155

Junior Member
Joined
Apr 21, 2025
Posts
1
Reaction score
0
Location
usa
First Name
kamran
Truck Year
1985
Truck Model
k20
Engine Size
400
I’m having trouble with my lights. The dome light,gauge cluster lights and one marker light works. I have power to the headlights and cab lights but no light. I’ve tried aftermarket led and original lights and still nothing.
 

Edelbrock

Full Access Member
Joined
Mar 28, 2025
Posts
169
Reaction score
149
Location
Earth
First Name
Grumba
Truck Year
1977
Truck Model
K5 Blazer
Engine Size
400
Bad ground? Double check you grounds between the body/frame/engine/ battery.
 

Scott91370

Full Access Member
Joined
Apr 2, 2018
Posts
1,061
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1,116
Location
Burleson, Tx
First Name
Scott
Truck Year
1985
Truck Model
Sierra1500
Engine Size
350
I like the ground idea - it happens A LOT.

How are you measuring voltage at the headlights and how many volts do you have?
 

Grit dog

Full Access Member
Joined
May 18, 2020
Posts
7,722
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13,742
Location
Auburn, Washington
First Name
Todd
Truck Year
1986, 1977
Truck Model
K20, C10
Engine Size
454, 350
No LEDs until you figure out the problem, which sounds like ground(s).
Do a little readin on here. This subject is discussed regularly. You’ll learn where all the grounds are to check/clean up. That’s where I’d start.
 

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