radio goes dim when brakes applied?

Question

when towing the trailer and i apply the brakes my dash board light go dim the hook up i have is the t type that just plugs into the light system of my truck could it be the wiring on trailer is wrong and how do i tell

Answer 1

Disconnect the trailer first see if the light dim when you hit the brakes, if not then you likely have a bad ground on the trailer wiring, its the most likely cause, If they do dim then check the light switch for loose wires and check all wiring grounds for tightness. A loose ground wire will let a light work at times and other times not work and will cause a draw as you discribed.
Good Luck and GOD Bless

Answer 2

Yes, there is a short in the trailer wiring. No easy way to figure that out, but with an ohm meter. Good luck.

Answer 3

thanks for a lengthy description of your issue. yet, without understanding the make, kind, year, engine length, and so on, i can't initiate to diagnose a issue correct. It appears like a lazy alternator and/or battery. both that or my 2d wager is that the vehicle is French, i ought to assert a Citroen, perhaps a C5 from round 2004/5 ish.