1975 Aljo trailer...
Hello all; It has been a while since i posted last and this post will be somewhat similar outside of a few questions, but please bare with me and my frustrations here, and hopefully i can sort it o...
Forum Discussion
You will need to get a basic understanding of your 12V wiring, both inside the trailer and the functions of the truck to trailer umbilical.
12 Volt side of life
umbilical schematic diagrams
I don't know how you tested your truck's umbilical socket but you will need a path from the powered pins (tail, turn, brake, etc) to truck ground to establish a complete circuit. If you connect the truck ground to trailer frame, the trailer will then have a referenced ground to the truck for testing. You don't have to rewire the trailer but will need to know which trailer connected wire supports which function when upgrading to 7 pin. If you're lucky, the trailer wiring will follow conventional standard color codes.
Prodigy 2 or 3 are good brake controllers and there are a lot of happy users on this Forum, including me.
12 Volt side of life
umbilical schematic diagrams
I don't know how you tested your truck's umbilical socket but you will need a path from the powered pins (tail, turn, brake, etc) to truck ground to establish a complete circuit. If you connect the truck ground to trailer frame, the trailer will then have a referenced ground to the truck for testing. You don't have to rewire the trailer but will need to know which trailer connected wire supports which function when upgrading to 7 pin. If you're lucky, the trailer wiring will follow conventional standard color codes.
Prodigy 2 or 3 are good brake controllers and there are a lot of happy users on this Forum, including me.
