hello thirdgens...


i have recently recieved a autometer pro comp 2 tach and i need a little help, ive searched the forums and have discovered how to wire this utensal but i have NOT found out what this last piece is for, im wondering where it should be installed or if i even need to install it... there are 4 wires plus a thick red wire with a piece on the end of it, looks like it may spin or sumthing, if u have any ideas of what i may be talking about, any help will do
Thanks

 

Hard to tell from the pics but is it a switch?

Maybe give the model number for your tach. Surely there has to be a install PDF for it.

 

its not a switch, i really feel like it spins maybe to spin the needle? but the piece end has a divet on it so it looks like it could only fit in one thing.. ill try to get a better picture but thanks for the reply