Axis Wakeboard Boat Forum

Anybody have this handy? I'm running into an issue with the 7 way connector on my truck and I want to make sure I know which holes are responsible for what on the trailer plug. Here's the issue I'm running into...

If I have the boat & trailer hooked up to my truck, and I have to back up a small hill, or soft ground, the disc brakes lock up, due to the mechanical design of the trailer. There are obvious mechanical workarounds that are not as convenient as fixing the electrical issue (buying the brake lockout bracket which I can only have hooked up when backing up, shoving a nickel in the slider pin slot, etc).

The trailer manual says the reverse lights on my truck should engage the hydraulic pressure control system, keeping the brakes from engaging...but that clearly isn't working. I'm going to check the appropriate pin on my truck with a voltmeter and make sure the reverse light 12V signal is at least making it to the edge of the connector. If not, I found my problem. However, I'd like to see the wiring diagram for the trailer plug so I can make sure it matches up with what I've got....I'm not sure if all 7-way connectors are universal or what.