Two days ago I made a post about a brake light problem. After further inspection I found that with the headlight on and the brake pedal pressed all of the elements in both bulbs barely light up. I am fairly sure I have a ground problem. Does anyone know where to start looking? Thanks

 

i had a similar problem with my 91 s10... it turns out there was a broken ground wire attached to the frame rail under the bed of the truck... i ended up buying a complete wiring harness for the back end before i realized the ground wire hanging there. should be somewhere close to the tail lights if its the same problem... worth a look anyway