Hayes Genesis Brake Controller Stays In Standby Mode When Truck is Turned Off

Question:

I believe that my controller may be draining my battery because it is staying in standby mode indefinitely when my truck is off. I cant find anything about this issue and I am hoping that you can provide me with an answer.

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Expert Reply:

Brake controllers such as the Hayes Genesis # HA81790 will go into a power saving mode after about 15 minutes of inactivity (sensing no movement). It may have an indicator light on showing that the controller is receiving power but this light draws only a few milliamps of power and it would take several months of it all just sitting there, not driving the truck at all, for it to drain the battery.

There are some situations in which the brake controller can stay on. A dirty or corroded trailer connector could make the brake controller think there is activity so it will stay on all the time. You would want to clean out the trailer connector inside and out to get rid of any dirt or corrosion.

If the trailer is connected and there is a short in the brake magnet wiring a similar situation could occur. Make sure the brake magnet wiring is not pinched or frayed and that the ground wires are attached to clean and corrosion free bare metal surfaces. You will also want to clean out the trailer side connector in case there is corrosion in it.

expert reply by:
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Michael H

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