Blue wire on 7 pin connector shows 12v all the time ? - Fiberglass RV


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Old 04-16-2008, 05:55 PM   #1
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Just installed a Valley Oddesey brake controller. The Blue wire from the controller has 12V on it all the time, regardless of whether the brake pedal is pressed or not. Is this normal ? I double checked all the wiring and it is correct. This just doesn't seem right to me and I can't remember if I ever checked this on my last install, which worked fine. I guess I could hook the trailer up and see what happens but I thought someone might have knowledge of this.
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Old 04-16-2008, 06:32 PM   #2
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some of the controllers send out a voltage to the brakes, which when connected give you an indicator light on the controller telling you you are hooked up to the brakes. I think it senses the resistance of the brake coil windings. the resistance is enough to drop the voltage to almost zero.
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Old 04-16-2008, 07:03 PM   #3
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Joe
Thanks, that makes me feel much better ! Was worried that there was a problem.

Mike
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Old 04-16-2008, 07:42 PM   #4
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Quote:
Just installed a Valley Oddesey brake controller. The Blue wire from the controller has 12V on it all the time, regardless of whether the brake pedal is pressed or not. Is this normal ? I double checked all the wiring and it is correct. This just doesn't seem right to me and I can't remember if I ever checked this on my last install, which worked fine. I guess I could hook the trailer up and see what happens but I thought someone might have knowledge of this.
I don't have an Oddesy controller but I have installed several controllers on my PUs over the last few years and none have had a continually hot line to the trailer.
I just went out and double checked the line on my new PU and it is only hot when the brake is pushed.
If it remains hot when the trailer is hooked up you will activate the magnets on your brakes or if you are parked you may run the TV battery down.
I would give the controller manufacturer a call to be sure.

Good luck,
John
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Old 04-20-2008, 06:40 AM   #5
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FYI, I contacted the mfg and they indicated that it is normal to have 12V at the blue pin on the connector. The indicated it is min amperage and drops once the brakes are hooked up and resistance is sensed at the controller.
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Old 04-20-2008, 03:11 PM   #6
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FYI, I contacted the mfg and they indicated that it is normal to have 12V at the blue pin on the connector. The indicated it is min amperage and drops once the brakes are hooked up and resistance is sensed at the controller.
Thanks, It's good to know for sure.
John
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