[OldGuy]

None of the lights in the rear passenger side are working. Bulbs checked. Fuses checked. Front signal OK. Driver side tail OK.
What could be wrong? Is the tail assembly independently grounded? The ground is the only thing I can think of that effects every light in the group.
Thanks in advance.

 

[baseballfanz]

Look under the truck, make sure your exhaust pipe hasn't rusted out and melted some harness.

 

[OldGuy]

Thank you Baseballfanz.

It wasn’t a melted wiring harness, but your suggestion led to the solution.
Three weeks ago, I needed to tap into the backup light (I have a boat trailer with surge brakes. The signal from the backup light allows the trailer to be backed up without it applying the trailer brakes). That shouldn’t have had anything to do with this problem – except maybe that wire harness plug that’s unplugged over on the passenger side.
I had wanted to test which wire color was the backup light.
It’s great to get old – every day is a new adventure.
THX

 

[Maverick-99]

im not sure if this is how the titans are wired, cause i havent had any issues yet ::fingers crossed:: and correct me if im wrong, but on most cars and trucks a break light is a combination of both blinkers going off at the same time and the chmsl or center break light is the only one that runs on its own switch directly connected to the break. so saying as how both a taillight and a blinker are out only on one side this strongly implies that it is not a sensor or electronic problem from before the pedal. i would check, as fanz said, below the bed and see if your exhaust burnt through it or if the connectors in the back of the light housing came loose from a large bump or hit, or perhaps the unexpected happened and all the lights went bad at the same time iffy at best but ive seen it happen before. good luck, keep us updated on progress. also if all the wires are connect use a volt meter to test the ends where it plugs into the tail light, and either have someone hold down the break or turn the blinker on before hand!

 

[OldGuy]

Thank You Maverick

As you can see from the post above yours, I did find I had left a plug un-done.
I was wondering about the fuses however. Thanks for that.