Was driving down road made left turn, turn signal acted like one was burned out.Blinking real slow on dash.checked front signals they were flashing fine,back ones real faint.changed out bulbs , checked out lights noticed that both rear lights were flashing same at the same time. When I step on the brake pedel they quit working all together until I release pedal.
What gives, I sure could use some help on this.

 

sounds like you have some grounding issues, lost a ground and you are getting feedback through the other circuits. either that or you need a new flasher module

 

Replaced flasher module today.still checking wirea for bad grounds.
this truck was realy abused before I bought it. the guy would drive it into lakes and stupid stuff like that.
thanks for the info.