green_380 Posted November 15 Share Posted November 15 '84 R model showing all red lights except aux when circuit chaser is plugged in. Any idea what could be causing red lights. When a circuit is chosen it turns to green except turn signals that when activated green and red light fluctuates on blinker. Thank you in advance. Quote Link to comment https://www.bigmacktrucks.com/topic/76152-red-lights-on-7way-circuit-chaser/ Share on other sites More sharing options...
Joey Mack Posted November 15 Share Posted November 15 A ground fault. Clip a wire to the ground pin and the truck and see if it changes. Quote Link to comment https://www.bigmacktrucks.com/topic/76152-red-lights-on-7way-circuit-chaser/#findComment-585615 Share on other sites More sharing options...
revnexis Posted 5 hours ago Share Posted 5 hours ago On an ’84 R-Model this is almost always a ground issue or voltage back-feeding. All red lights with the circuit chaser usually indicate a poor cab, frame, or rear light ground, often from corrosion. The turn signal flashing red and green is a classic weak ground at the rear lamp housings or a bad cab-to-frame ground strap. I’d start by checking and cleaning the cab-to-frame ground, battery/frame grounds, and rear light grounds before chasing switches or wiring. Quote Link to comment https://www.bigmacktrucks.com/topic/76152-red-lights-on-7way-circuit-chaser/#findComment-588121 Share on other sites More sharing options...
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