how can I safely test a speed warning buzzer out of the box? part #6407377. posts are marked #1,#2, #4

 

anyone?

 

I have a few speedminder speedos. I think I only have one good buzzer though? I tested mine by attaching it to the speedo & applying power & ground to the appropriate terminals on the back & used a variable speed drill to spin the speedo needle till it touched the buzzer wire. I can get a picture or two of where it hooks to the speedo circuit board & we can probably figure it out? Text me if you can & I'll text pictures to you or put them here?
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