The 2003 Ford F-53 chassis is wired for a brake controller. There should be a plug that will use wiring harness # 3035-P under your dash to the left of the steering column. I don't have more specifics or pictures for your specific motorhome, so you will need to look around for that compatible harness. I then recommend using the Tekonsha Prodigy P3 brake controller # 90195. This controller using a LCD screen to give you diagnostics and an easy to understand troubleshooting if needed.... view full answer...
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