I just got a new main underdash harness and instrument harness for my 63 C-10 with warning lights. I installed them this weekend. This morning I found that my right blinker outside blinks and the indicator light inside works; however, when I hit the left blinker, the blinker outside works but my gas guage starts to bounce back and forth with the blinks. The gas guage does not function now as it did before. I checked my owners manual and all the color coding is correct. My question is, did I do something wrong or should I get with Chevy duty about a new harness??? Any help would be greatly appreciated. Thanks for yalls time.
