It looks like the hyperflash is a big warning that isn't too difficult to solve. I installed them in clear and amber on my 2002 Chevy Silverado. When the headlights were in automatic mode, everything was fine. When the parking lot or headlights were on, my turn signals and hazard lights refused to flash. Also, my turn signals and high beam indicators on my dash were dimly lit. I tried everything for 2 days to isolate the problem and gave up. What I didn't do was put the bulbs back in the turn signals. My workshop did it and my problems were gone. If you want to use these bulbs some cars may require resistors and a new turn signal to get everything right. Light bulbs with built in resistors would be better.
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