Hi,
Have all new wiring (M&H) installed in my 1965 Malibu. Everything works except the horn and wipers. Picking up a new relay from NAPA tomorrow. The horn "clicks". The relay has "BAT" marked on 1 terminal. Do I connect the set of red wires which has 1 wire larger than the other set to "BAT"?
The wiper motor and washer button "clicks" too. Have the top connector with blue on the left and yellow on the right as you face the car. On the 3 wired bottom, I have blue (left) yellow, and black. The wiper arm is setting at the far right as you face the car. The wiper motor is original and has been sitting in a box for 6 years. I appreciate any help!
John

I had a similar problem when I replaced my dash and it was all because the new dash didn't have a full metal harness the entire system wasn't ground right. So I would suggest to just check your grounds. Try running wires from terminals to the sheet metal and then see if anything changes.