I have a problem with my 1977 Chevy Truck. When I turn on my headlight switch, the back-up lights come on and stay on the entire time I am driving. I have tried replacing the headlight switch and the back-up light switch on the base of the steering column. I also have replaced the ignition switch, as the problem first began about the same time as my ign sw went bad. Please help any suggestions on how to resolve this problem. Thank you, JC Busch
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