To install a trailer brake controller like the Prodigy P2 # 90885 in your 1967 Ford Ranchero you will need to do a hard-wired type installation.
This will require the vehicle have a 4-pole wiring harness like # 18252. This wiring will then be converted to the 7-way format using our brake controller install kit # ETBC7. This kit includes the 7-way, circuit breakers, connectors and all other wiring components needed.
Finally you will want to select a controller like the P2 or the Primus... view full answer...