Installing a Brake Controller on a 1994 Chevy Blazer From Scratch  

Question:

Expert Reply:

Yes. We have numerous brake controls to choose from. Our most popular model is the P2, # 90885. But before you can start using it, there are a couple of things you will need, and some installations that need to be complete.

First of all, you will need to install Curt Custom Fit Vehicle Wiring, # C55319. This is a simple T-One connector that plugs in line with your vehicles taillights. I have included the instructions and an installation video below.

Next you will need to install a 7 and 4 Way installation kit, # ETBC7. This kit allows for a 7 or 4 pole connection at the rear of the vehicle. It plugs into the 4 way you just installed and connects to the brake controller and vehicle battery.

If you are fairly experienced with automotive or electrical projects, this should not be too hard. I will provide a brief outline here.

Starting with the ETBC7 kit, after installing the 118319, ground the 7-Way white wire onto the vehicle frame. Connect the black wire in the grey duplex cable (included with the ETBC7 kit) to the black wire on the 7-Way. Then connect the white wire from the duplex to the blue wire on the 7-Way. Next, you will route the duplex cable under the vehicle to the engine compartment.

Next, mount the brake controller where you will have easy access to it using the bracket and screws provided. I have included a link to the instructions below.

Last is to make the connections from the brake controller to the vehicle. On the duplex cable, now under the hood, separate the white brake wire from the 12-volt black wire. The white wire gets routed through the firewall, under the dash, into the vehicle. This wire connects to the blue wire from the brake controller. The black wire gets connected to the positive battery terminal via a 40 amp circuit breaker. Mount the circuit breakers under the hood or dash then route the black hot lead to the 40 amp breaker via ring terminals and then to the positive battery terminal.

The black wire on the brake controller connects to a 20 or 30 amp circuit breaker (see the brake controller instructions for which circuit breaker to use) and then to the positive battery terminal. Route the brake controller white wire to the negative battery terminal. From the wires connected to the brake switch at the top of the brake pedal, find the wire carrying a signal only when the brake pedal is engaged. You will need a circuit tester like # PTW2992. Connect that wire to the brake controller red wire.

That is pretty much it. I have included an FAQ on wiring a brake controller from scratch that will guide you through the process.

expert reply by: Michael H

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