RR brake light keeps blowing
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Cross-Country
Joined: Oct 2015
Posts: 83
Likes: 1
RR brake light keeps blowing
Any advice for troubleshooting this issue?
When hitting the brakes, RR tail light does not light up.
I remember the tail light will light up if the night time running lights are on.
When a trailer is connected. The trailer RR seems to blink no problem and the trailer RL does not work???
I have a LOADpro dynamic test lead but I'm doubting this would be of use.
If a fresh bulb is installed, It will work for awhile then blow.
When hitting the brakes, RR tail light does not light up.
I remember the tail light will light up if the night time running lights are on.
When a trailer is connected. The trailer RR seems to blink no problem and the trailer RL does not work???
I have a LOADpro dynamic test lead but I'm doubting this would be of use.
If a fresh bulb is installed, It will work for awhile then blow.
Banned
Joined: Dec 2018
Posts: 3,541
Likes: 458
So the running lamp always works but the filament for the brake lamp keeps burning out? It could be a bad taillamp assembly but check the fuse for that circuit in the power distribution box under the hood and make sure it's the correct amperage rating and maybe just replace it whatever it looks like to be certain. Sounds like somehow too much power is getting back there to the bulb but because the brake lamps are not always on you're getting away with it for a little while before the filament burns up. It's a dual filament bulb in the pick'emup taillamps also I a pretty sure. (I don't have a pickup).
As for the trailer circuits, just do yourself a favor and go buy a 7-way circuit tester from the local RV or Auto parts store. Very handy troubleshooter when trying to figure out if it's a truck problem or a trailer problem.
https://www.northerntool.com/shop/to...8224&gclsrc=ds
As for the trailer circuits, just do yourself a favor and go buy a 7-way circuit tester from the local RV or Auto parts store. Very handy troubleshooter when trying to figure out if it's a truck problem or a trailer problem.
https://www.northerntool.com/shop/to...8224&gclsrc=ds
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
For future readers, I had a similar experience to this after bringing the truck out of off season storage. Perhaps the 5,500 mile cross country trip last year had something to do with it, but I suspect it was aging of the parts involved.
I ended up removing the tail light housing, cleaning the contacts in the socket with a pick and then with electrical contact cleaner spray. Then I pried the contacts up a bit to make the gap a bit smaller. I installed a new bulb and pried those contacts up a bit too.
So far so good, but I have only driven the truck a couple hundred miles since then due to fuel prices and life events getting in the way.
I ended up removing the tail light housing, cleaning the contacts in the socket with a pick and then with electrical contact cleaner spray. Then I pried the contacts up a bit to make the gap a bit smaller. I installed a new bulb and pried those contacts up a bit too.
So far so good, but I have only driven the truck a couple hundred miles since then due to fuel prices and life events getting in the way.
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