Expert Answers about Peterbilt 338

• Hayes Air Actuated Brake Controller or Tekonsha Prodigy P3 for Peterbilt Truck with Air Brakes
• For your Peterbilt 335 I definitely recommend going with the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 over the Hayes # HA100400C because it's going to allow for a much easier install and is more economically priced. The P3 also offers a clearer LED display on the unit itself so it's more user-friendly during actual operation as well. For power the P3 will just get wired into the truck like the Hayes controller, tapping into 12V power and the brake light switch. The difference...
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