1985 Chevy k30 trailer wireing help

[Dustan]

I have a one ton chevy k30 diesel pickup. I need to wire up a harness for a civilian trailer. I purchased a t adapter from jc whitney, but is square 4 wire, and the only wire harness that i can find on my truck is FLAT 6 wire. Im thinking the other two wires are for the blackout lights? does anyone have any experience with this? is there an adapter that I can get, or do I have to cut and splice?

any info would be much appriciated

 

[Crash_AF]

You have to get an adapter for an 84 or older Chevy... GM Defense did not update the CUCV's wiring with the 85 and later updates for parts compatibility purposes.

Other option is to purchase some flat 4 weatherpack connectors and make your own T adapter. Match the colors from the wiring diagrams to the pins and you're home free.

Later,
Joe