Gentlemen I have a 65 1/2 ton, when i apply the brakes with headlites off the brake lites work fine, when I have the headlites on and apply brakes no brake lites, any hints on where to start with this? Thanks in advance for the help Ken
Ken: Check the headlight switch in the dash. I had the same problem and it was corrected when I replace the headlight switch. I hope this helps. Tony
