Third brake/ cargo light issue

[TexasRebel]

Recently noticed that my third brake light and cargo lights on my 96 stopped working. The bulbs are new and the switch seems to be getting power as far as I can tell. Is it a common problem for these trucks to have a break somewhere in the wires from the switch to the lights?

 

[Nad_Yvalhosert]

Start with the basics, check your fuses. There is a CHMSL fuse...

 

[Tdean91491]

Maybe this will help you.

 

[RobMaier]

When I was removing mine to replace with led model there was some serious damage to the connectors and wiring due to overheating. Up to that point everything was completely stock, so not sure what the cause was.

 

[chevyrider838]

Any updates on this? Thanks

 

[GoToGuy]

How about the grounds, clean shiny?

 

[someotherguy]

Recently noticed that my third brake light and cargo lights on my 96 stopped working. The bulbs are new and the switch seems to be getting power as far as I can tell. Is it a common problem for these trucks to have a break somewhere in the wires from the switch to the lights?

The most common failure, not the ONLY possible cause, but most common, is the "circuit board" (really just flat copper strips molded into the plastic) in the lamp housing corrodes internally and you really just can't tell. You can test for power at the connector.. if it's getting there, then it's pretty clear where the problem is.

Richard

 

[TexasRebel]

Any updates on this? Thanks

No update as of yet. Been too busy to do anything with the truck. Hopefully going to take a look at it later this week.

 

[Adam2500]

Ever figure it out?

 

[BonestockK1500]

The most common failure, not the ONLY possible cause, but most common, is the "circuit board" (really just flat copper strips molded into the plastic) in the lamp housing corrodes internally and you really just can't tell. You can test for power at the connector.. if it's getting there, then it's pretty clear where the problem is.

Richard

Agreed, my brake light works but cargo doesn’t, getting 12v at the incoming pins to the circuit board with switch on but nothing at the light sockets , which leads me to conclude the problem is the green corroded copper between the two points…unfortunately it is embedded in the white plastic board housing so I see no way to clean/ repair.