Hi I have wired a 7 way bypass relay to earth and permament live ( with an inline fuse between relay and live connection ) with no other wires connected yet. As soon as I put in the inline fuse I get a constant high pitched whistle coming from the relay box. If I connect the towbar plug socket wires it does the same. I then connected the rear light wires from the vehicle. It still whistles. Obviously removing the fuse at each step. Does this mean the relay is faulty or am I doing something wrong? Regards
- posted
14 years ago