oldspackrat

I'd bet I've overlooked this option before but this is the first time I've paid enough attention to actually recognize what this was. I recently stripped & scrapped a '70 Cutlass convertible body tub & debated pulling the rear light harness. I have a whole box of these but most have an issue or two so I said what the heck, I'll pull this one too. As I was removing it I saw some unfamiliar wires & said to my self Oh, someone installed an aftermarket trailer hitch wiring harness. But when I got to really looking at it, I'm sure it is a factory piece as the wires & connectors are original to the car. Not a huge deal I know but after playing with hundreds of Cutlasses I don't see much "new" stuff anymore. It has one cut blue wire at the plug end and I don't know what that would go to, maybe trailer brakes??? Any way here are pix of said harness.

RetroRanger

My dads old 71 supreme convertible had a trailer hitch on it, but the wiring was noticeably less professional than factory.

joe_padavano

RPO U89, Wiring Harness, Trailer Electrical. Yes, blue is usually for trailer brakes.