Should I Have Constant 12 Volt Power On Brake Output Pin On 7-Way Connector
Updated 07/31/2019 | Published 07/29/2019
Question:
You answered the Nissan Owners as follows: If you are getting 12V of constant power on your brake controller output wire then you need to cut the blue wire from your Voyager about 6inch away from the controller and see if it still has constant 12V power. If it does then there is an issue with the wiring to the controller or your Adapter # 3050-P if you have the factory tow package. If there isnt constant 12V power then there is an issue with the wire from your brake controller to your 7-Way. Did you really mean to say inch If there isnt constant 12V power then there is an issue with the wire from your brake controller to your 7-Way.? I am having the same issue with my 2002 Dodge 3500. Should I be seeing the constant 12 volts on the blue wire from my Teksohsha Voyager Brake Controller? The brakes are working but are getting hot in just a short distance. I intend to readjust the brake shoes tomorrow to make sure shoes are set correctly, but need to know that the constant 12 volts on the blue brake wire is correct. I assume if it is correct, that the proportional brake is achieved by varied amperage and the load being present by having a trailer plugged into the receptacle loadsinch the circuit and the amperage load then changes color of the light from green to orange and then to red, depending upon the gain setting and the aggressiveness of the brake application on the towing vehicle?
asked by: Marvin H
Expert Reply:
No you should not have constant power on the brake output pin, the blue wire should only have power with the brake pedal depressed in the vehicle or the brake controller manual override is activated. If the blue wire has a constant 12V then it is an indication that your brake controller is bad, the red wire was installed incorrectly or there is a short in the wiring.
If this is a hard wire installation (does not use a brake controller adapter cord) then the red wire will connect to the cold side of the brake switch in the truck. If the red wire was attached to the hot side of the brake switch then your brakes will get constant power. You want the brake controller to be activated by the vehicle brakes only when the brakes are depressed. You want to attach the red wire to the wire near the brake pedal that only shows power when you press the brake.
If your red wire is attached correctly, sever the blue wire 6 inches back from the brake controller and still have 12V without the brake pedal depressed or manual override applied then the brake controller needs to be replaced. If that is the case I recommend Tekonsha Prodigy P3 # 90195 because of it's LCD display screen. It shows read outs of actual words instead of troubleshooting codes that can be hard to decipher so it is much more convenient in stressful troubleshooting situations in the future.
If the blue wire only shows 12V when the brake pedal is depressed or the manual override is applied then the issue is somewhere between the brake controller and the 7-way plug, not the brake controller itself.
Go ahead and reconnect the blue wire to the brake controller and inspect the 7-way plug. You want to check the 7-way plug for any bent pins or corrosion on the pins that could be causing a short on the brake output pin. If you see signs of corrosion you can sand it off with a fine grit sand paper.
You can use the circuit tester to test the brake output pin on the 7-way for constant power without the brake pedal or manual override applied. If you have constant power there then you want to check to trace the blue wire from the 7-Way up the vehicle for damage or exposed sections of wire.
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