tach goes to 0 when lights are turned on
I just got done putting an American Autowire factory fit harness in my 67 RS and now whenever I turn the parking lights on the tach drops to 0. When I turn the lights back off it works fine. I also have an issue where the turn signal indicators in the dash light up when the park lights are turned on, but I think that is a ground issue at the front park lights. If anybody could help that would be fantastic!