Hyper flasher in relay switch

2002 CHEVROLET TAHOE
200,000 MILES • V8 • 4WD • AUTOMATIC
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My turn indicators sound like they have been turned on even when not in use. all bulbs intact and work. looked for new part- discount at GM dealer- pulled one from wreck still has "hyper flashing" sound. also tried other new replacement parts from O'Reilly and Napa and AutoZone all failed to install correctly.

Will I need a whole new flasher wiring system?
Feb 23, 2019 at 11:21 AM
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Hello

It sounds like you have a bad ground. here is a guide to help you test the ground circuits and the blinker wiring diagrams and flasher location so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-wiring

Check the grounds for the bulbs. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Feb 25, 2019 at 12:30 PM