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-   -   Chasing an electrical gremlin (http://67-72chevytrucks.com/vboard/showthread.php?t=742420)

jbgroby 07-15-2017 02:05 PM

Chasing an electrical gremlin
 
I hope i explain this correctly and also hope other can direct me to the possible fix?

When I pull the headlight switch out to the first position the hood running light and tail lights come on. When I press the brake pedal the passenger side brightens but NOT the drivers side.

BUT when I pull the switch to out fully to turn on the head lights, the tail light out out?

Any pointers?
21 circuit from E-Z wiring is what is installed

Thanks

bpmcgee 07-15-2017 02:49 PM

Re: Chasing an electrical gremlin
 
I believe the tail light is a two filament bulb -- one being running light and one being brakes. If the drivers side doesn't brighten, it would mean either the filament is bad or there's a bad wire going to that particular filament.

I BELIEVE the front parking lights are supposed to go out when you turn on the headlights -- is it possible you got the front and back parking lights reversed?

B

jbgroby 07-15-2017 06:51 PM

Re: Chasing an electrical gremlin
 
The hood lights go out when the headlight come on as they should, no matter the position of the switch, I still have power to the brake switch when I press the brake as I should as well. The dash and front end works as they should, its the brake lights that are making me crazy.

goofy063 07-15-2017 10:05 PM

Re: Chasing an electrical gremlin
 
check your
rear bulb I've seen the filaments burn through and fall across to the other filament and back feed

jbgroby 07-16-2017 09:07 PM

Re: Chasing an electrical gremlin
 
I'll buy two new bulbs and give it a try. Thanks


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