03 Sportster 155 4TEC tach alerts and beep not working

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sportsterstpete

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03 Sportster 155 4TEC tach alerts and beep not working, any idea why they would bump like this? Anybody know where the grounds are for the ECU and gauges so I can check them? A lot of work was done to restore this and it's in good shape but some wires might've been cut. See video below:

New video by E B
 
The grounds are at the lower left(port) side of the front of the engine...there may be 1...or there may be 3 of them...all securred with 10 mm bolts.
 
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