Re: Wiriung trailer brakes

Posted by KEB on April 24, 2006 at 14:16:00 from (192.31.106.34):

In Reply to: Wiriung trailer brakes posted by Mr. Davis on April 24, 2006 at 07:55:20:

Brake magnets are not polarized. Either wire can be positive (connected to the brake controller).

Be aware that some trailers, particularly smaller ones, depend on an electrical connection through the coupler ball for a ground path for the lights. This is a poor approach for brakes; intermittant lights are an annoyance, intermittant brakes are dangerous.

Use a wired return back to the tow vehicle electrical connector ground pin. Don"t depend on a connection to the trailer frame. It"s fine to also connect the trailer frame to the connector ground pin to provide an additional return path for the lights.

Finally, make sure the tow vehicle side is well grounded to the vehicle chassis, or as suggested, run a return wire all the way back to the battery negative connection.

Keith

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