I just got finish putting a 1986 k10 Silverado fuse block in my 1985 m1028. I used the 86 k10 headlight and engine harness, but I kept the cucv taillight harness and Now my brake lights wont work. Does anyone have any experience with this. I do not have a k10 taillight harness or I would just use that, should I just bite the bullet and find one or will the cucv harness work