Trailer brake light problem - help please!
Hi Guys
Just picked up a new (second hand) trailer to replace my oldy. But the problem is that the brake lights don't seem to want to turn on. Tail and indicators work no problems.
I have checked with the multi meter and 12v comes out of the correct pin hole from the car whent the brake pedal is applied - so that is no problem. It is a 7 pin flat connector.
My old trailer uses separate brake bulb from the tail light bulb and this works fine when connected to the same car. But the new trailer has a dual filament bulb for the tail and brake light cluster. Is this the difference? Do I need to do something special to make this work? How do dual filament bulbs work anyway - does the tail light work on lower amps and the brake light is supposed to turn on when higher amps are applied?
I have pulled off the lense cover for the light on the right side of the trailer and can see that the wires going into the dual filament bulb are the 'neutral' and 'brake' wires when I trace back to the plug. So I gather that this is wired correctly. [But I can't see then how the tail light gets power]. Any idea what I need to do to get the brake lights working?
Could it simply be bad connection somewhere or do I need something else?
Thanks!