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Old 12-29-2005, 02:42 PM   #1
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1979 23' Safari
1968 22' Safari
near Bridlington , East Yorkshire
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Takonsha brake controller installation

I wonder if anyone can help?

I am in the process of fitting a Takonsha Brake control unit to the towing vehicle and think I may have come up against a problem.
There are 4 wires on the unit - in accordance with the instructions I have done the following:

one wire goes to ground (white) - one wire goes to the dead side of the brake switch on pedal (red) - a heavy duty one goes to the positive side of the battery (black) and finally the blue wire goes to the plug at the rear of the car and to the brakes on the trailer. This is the wire I am having problems with (I think).
When I put an electric meter to the end of the blue cable (with the brake pedal off) and earth it - it reads 12V - surely it should only do this if the pedal is pressed? Is this normal or have I done something wrong?

Please can you help


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Old 12-29-2005, 02:56 PM   #2
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Does the panel of the controller show that it is supplying voltage? I don't know this controller very well but usually if voltage is being supplied to the pin in the socket, you should have some indication on the controller itself.

Three thoughts come to mind. One, you have check to be sure you are testing the proper pin in the socket. Second thought is that you may be picking up 12 volts due to a wire touching the 12 volt lead which is on a different pin in the socket. Last thought woud be the possiblity that you wired on the wrong side of the brake light switch.

The first two possibilities would not lite an indicator on the brake controller, the last possiblity would light the controller.

What model is your controller? Tekonsha has a web site with an FAQ on their various controllers.


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Old 12-29-2005, 03:08 PM   #3
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From my Prodigy Instructions, it sounds like the wires are correct. I did not have to do this, they had an adapter cable that plugged directly into my TV. From the discription of what you are seeing, something could be wrong. If your controller is good, you should not see 12 volts on the Blue (trailer brake line) at this time. Unless it is useing this voltage to determin if the trailer is connected. I would verify that you are connected to the correct side of the brake switch first. If that is correct, call 1-888-785-5832, the support line for Tekonsha. Good luck!


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Old 12-29-2005, 04:13 PM   #4
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Stu... I presume that you're NOT wiring the Tekonsha controller to a U.S. version tow vehicle? On 12v U.S. market vehicles, red is hot (+) and black is ground (-) (earth). It sounds like you're describing a positive ground system? If the black terminal on the battery is really the positive terminal, you may need to switch your postive and negative leads.

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Old 12-29-2005, 05:34 PM   #5
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Is it a Prodigy?

The Prodigy puts voltage (but not appreciable current) on the blue wire to check whether there is continuity to the trailer brakes. When you are hooked up, the Prodigy display changes to "C" indicating a connection.

OTOH, if the ground and + 12 are reversed, it will probably destroy a Prodigy.
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