I had intermittent problems with my left rear park light, harness socket got hot and "enlarged" the small opening for pin 1, making it not get full contact at times and getting the "Lamp Out" sign on dash.
It always worked anyway, it was just a message, sometimes just a "smack" on the taillight fixed the problem for a while.
Then I replaced the complete light, there was no significant improvement.

Now I have no left tail light at all, and the Lamp Out warning won't even come up anymore. Turn, backup and stop work fine. I checked with a tester and I have no power to the connector pin. Checked and tested ALL the fuses and all are working fine.

I am crawling under truck to see if I can see a broken wire but I'm afraid it's not going to be as simple.

Anybody have another solution to this ?

 

i would check ur trailer wiries also and the plug i have had the trailer plug get nasty and mess with my lights . also pull bck the protective coating on the wires and check all the factory splices and stuff like that , good luck