If you want to use a brake controller that does not require the use of the air brakes on your Mack Truck, then you can use an electric brake controller like # 90195. You will have to hardwire it to the vehicle and you will need a 7-Way trailer connector if your do not already have one.
I assume that on a truck of this size, you will have some type of trailer connector on it. It is just a matter of wiring it in correctly. On the brake controller, the white wire needs to be grounded to the... view full answer...
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