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Re: What do the under dash fuses go to?
Check your ground wire in the truck for the rear tail lights, if the u mention the tail lights r u referring to the brake lights , this is a system that receives power from three separate source so if noe work it would have to be in the wirering to fix the problem
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Tail lights, parking lights and dash lights are all on the same circuit...I'd go to the fuse panel under the dash and check the fuse for those lights....usually referred to as accessory lighting in the owners manual and is usually a 10A fuse.
This is the PARK LAMP fuse . So check this out on the under side of the dash and use a nose plier to pull the fuse out to be replaced by the spare in the box.
If the fuse seems ok, then check the harness, connectors to the dashboard cluster or the lamps within the dash.
Often times the tail lights and dash lights are powered by the same fuse. The reason for this was so you would know that your tail lights weren't working if you didn't have any dash lights. I would look for a fuse that says "Tail" or "Courtesy". Your owners manual should have an illustration of the fuse panel and what circuits they power. Good luck, hope this helps!
Left of the steering wheel & under the dash is the fuse panel for this. No.9 is for the tail lights, but also for many other lights such as licence lamp/parking lamp/side marker/tail gate/etc...
There is also an under the hood fuse/relay panel, but it does not have the tail light fuse in it.
The tail light fuse has to be located in one of the fuse boxes. IF it is not on the one located in the interior of the vehicle that is another fuse box located under the hood, normally near the air cleaner.
you have to check all fuses with a test light both fuse boxes under hood and under dash... if good next to look for is the light switch itself... has any radio work been done to the lately... if so alot of times hooked up wrong will blow park fuse as one of the wires to radio is the park voltage to tell radio to dim down some