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1990 Chevrolet Truck Repair Question


Topics covered: Fuse, Fusible link, Headlight switch.
Mileage: 130,000 miles.

Asked on January 19, 2013

Chevrolet Truck Fuse Problem

My tail lights dont work parking lights dont work and my dash lights dont work headlights work and my interrior lights work brake lights and signals all work all the fuses looked good but th fuse labeled PANEL LPS is dead and with no power going to it please let me know where to go from here thanks
Avatar Asked by matttyw20

Answer

Replied on January 19, 2013

The voltage to panel lamps fuse comes from fusible link, battery junction block, underhood, passenger side firewall. The fusible link is black, check for voltage on both sides of link, if one side has voltage and the other side doesn't, the link is faulty. If more than one black fusible link, check them both.

Tiny Answered by JDL (expert)
14,417 answers provided
Replied on January 19, 2013

I checked that red wire near ECM an There was power there i removed headlight switch an had power on red an orange wire then wen switch is on power to the yellow wire could it be a bad headlight switch

Tiny Response from matttyw20
18 questions asked
Replied on January 19, 2013

Is there a brown wire coming off head lamp switch? That wire should carry voltage for tail lamps and other. The headlamp switch has two circuits. One side of headlamp switch is a circuit breaker, only for headlamps. The other side of headlamp switch controls feed for other lighting, including the tail lamps. I believe there is a different voltage source for each side. I'd want to check voltage sources to and from the headlamp switch, before condemning the switch.

Tiny Answered by JDL (expert)
14,417 answers provided

Replied on January 19, 2013

An how would I do that I only have a test light i kno that everythin worked thursday night

Tiny Response from matttyw20
18 questions asked
Replied on January 19, 2013

Probe the proper wire with test lite. Does the testlite have a sharp pointed end, that is the reason for the point, probe the wire or backprobe the connector. If you make a hole in the wire, cover it up with nail polish or something.

Give me a second and I'll find the wiring for headlamp switch.

Tiny Answered by JDL (expert)
14,417 answers provided
Replied on January 19, 2013

Here is wiring for headlamp switch.

Tiny Answered by JDL (expert)
14,417 answers provided

Replied on January 19, 2013

heres where im at i turned the headlight switch on got power at park lamp fuse but no power at tail lights tailingts blink and the brak lights works but no pwer for just lights let em kno what you think thanks

Tiny Response from matttyw20
18 questions asked
Replied on January 19, 2013

I gave you everything you need to check circuits at headlamp switch. Unless you can do the testing. I don't know where to go from here.

Tiny Answered by JDL (expert)
14,417 answers provided
Replied on January 20, 2013

I kno you gave the diagram but I was wondering is there any parking lamp relays that could have blown I kno there's 2 relays above the fusebox and 2 inside the fuse box do any of them control the parking lights thanks in advance for your help

Tiny Response from matttyw20
18 questions asked
Replied on January 20, 2013

No park lamp relay according to my diagrams. Park lamps get voltage from light switch, brown wire is voltage for park lamps.

Tiny Answered by JDL (expert)
14,417 answers provided