Finding Stoplight Circuit on 2004 Holiday Rambler Endeavor for Brake Controller Install
Published 10/09/2019
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Question:
The problem is that the circuits lose voltage when the pedal is applied and this suggest to me that the brake light relay has constant voltage applied to keep it in open circuit, thus when the brake pedal is applied the brake circuit is closed by the lack of voltage. A rather complicated way to accomplish brake lights. I will try your suggestion and give you further follow up. Thanks for your assistance
asked by: David G
Expert Reply:
Your 2005 Holiday Rambler Endeavor is built on a Roadmaster Motorhome chassis which inconsistently has brake controller wiring like you have found. Since you can't find the stoplight signal wire the best option is to use a circuit tester like part # PTW2993 to test all of the wires that run to the brake light switch circuit on the brake pedal till you find a circuit that carries voltage only when the brakes are applied and use it to wire to the red wire of your brake controller and you'd be set. The switch on the brake pedal is what tells the stoplights of the RV to apply which is why the circuit you need happens to be there.
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David G.
10/9/2019
The problem is that the circuits lose voltage when the pedal is applied and this suggest to me that the brake light relay has constant voltage applied to keep it in open circuit, thus when the brake pedal is applied the brake circuit is closed by the lack of voltage. A rather complicated way to accomplish brake lights. I will try your suggestion and give you further follow up. Thanks for your assistance