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Pierce county WI | Try it hooked to a trailer, or unhooked if it's hooked to one already. Mine will do that if it's not getting good ground through the 5th wheel. It's definitely a ground issue. When you said the flasher worked when you touched with the test light, that meant it was getting a ground to complete the circuit. One other thing, if you just changed the lights to leds the flashers won't work without a digital flasher. Leds don't draw enough power to get the flasher to work, good luck! | |
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Peterbilt 379 flashers/turn signals not working
