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Old 02-23-2015, 10:59 AM   #1
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Brake Lights Flashing on Towed Saturn

2005 Alpine Coach FDDS -- Tow car is 2003 Saturn LW200
When hooking up the wiring (as per Roadmaster Instructions) the brake lights on the toad flash as does the Vansco #12 led. The coach brake lights operate OK. All the other modes operate OK. NOW. If we removed any bulb (turn or running) the brake do not flash. The RV repair guy thinks that the Vansco is not allowing enough wattage to operate correctly and this is why the brake lights flash as does the Vansco #12 flash. Looks like it is going off and then back on, thus causing the flashing.
I am looking for some real answers please!
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Old 02-23-2015, 02:35 PM   #2
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I also have the Vansco same as yours. You said you are using Roadmaster instructions. Are you using the Roadmaster wiring guide for a separate towed vehicle to a separate motorhome? I used the Roadmaster Hy-power diodes connected as close to the towed brake lights as possible and all the lights work fine.
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Old 02-23-2015, 03:30 PM   #3
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The Vansco unit will only output six (6) amps of current. The brake lights on my tow also flashed until I placed a relay in the circuit. I left the coach lights as they were, tapped the brake signal to control the relay on and off. To supply the tow lights, I ran a separate 12 VDC line (fused) to the relay and from there to the tow connector.

Been working ten years.
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Old 02-23-2015, 03:49 PM   #4
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Like me get this right. Does the Vansco then control the relay while the separate 12VDC line in made or broke across the relay switching studs?
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Old 02-23-2015, 06:19 PM   #5
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I have a 2011 Equinox that I had a set of bulbs installed in with the original bulbs that have worked for me trouble free. It plugs into the six pin socket of the RV & is completely independent of the Equinox's stock setup. I have towed behind 3 different RV's with no problems.


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Old 02-24-2015, 12:14 AM   #6
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Quote:
Originally Posted by Louie & Linda View Post
The Vansco unit will only output six (6) amps of current. The brake lights on my tow also flashed until I placed a relay in the circuit. I left the coach lights as they were, tapped the brake signal to control the relay on and off. To supply the tow lights, I ran a separate 12 VDC line (fused) to the relay and from there to the tow connector.

Been working ten years.
I did the same with my 2004.
Found the brake lead in the battery compartment, cut it and installed a relay. Connected a fused hot wire from the battery to the relay and sent it down the line to the trailer plug.
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