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Wondering if anyone else has had this happen. I have headlights but the high beams don't work. Blinkers aren't working either. The turn signal switch was replaced and did not correct the problem.
 

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I'd check the fuses. If it's not that, then there's a good chance you're looking at a defective BCM ($$$). But first, I'd check the wiring from the turn signal stalk back to the BCM.

Does the 4-way flashers work?
 
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Ok, the flashers use the same bulbs as the blinkers. So everything from the BCM to the bulbs are OK. Given that everything affected is part of that control, I think there's something keeping the signal from getting to the BCM. I suppose it's possible to be a bad BCM, but that strikes me as unlikely.
 
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