Originally Posted by kirnzy
oh and TnDz TJ would you mind dumbing that down for me lol. im fairly smart in areas other then electronics and engine repair thank you
Sure.... you said it blows when brakes are applied.... this means that you have a short to ground on the hot lead feeding the tails and the 3rd light above your spare.
Start at the the 3rd light as suggested. Inside the tailgate is a small plastic cover with two metal contacts that contact two identical ones when the tailgate is closed. Pull the cover off the tailgate and expose the connectors that feed the third light. pull those connectors off the leads and fish them out of the tail from the outside. INSPECT every inch of those two wires for exposed wires(insulation breeched), pinched or damaged areas. Any of this could be your problem if there is a breech and rubbing the tailgate somewhere.
If that all looks good.... move to the tail lights
Since your running lights should still work, disconnect the leads under the body, just under the each tail light. Should be a 3-4 wire connector on each side. On my 04.. the passenger side feeds the driver side. I know this because this is where you integrate and trailer wiring harness with a T connector.
Start there with what you KNOW works... running lights or turn signals... etc....
Use a light probe or meter.... I like the light probe to test hot leads... meters for grounds.
Isolate your known GOOD circuits then check whats NOT working to ground... if you have more than one wire making continuity to ground, you are that much closer to find the root cause.
check the harnesses carefully for cuts breaks pinches in those areas.
Like I said.... can be a long painful process... but worth it to find on your own if you can.... diagnostics can be a wallet burner!!!
I'm hoping not to confuse you.... trying hard to help!