I need help:

BIKE: FAT BOY 1997
I bought an 2 5/8 and a HD tach mount/bracket 68960-98A. There is no manual or wiring diagram:

Only three wire:

Red
Black
Yellow

WHERE ARE THEY PLUGGED IN?

 

Red - Positive (Switched Acc power)
Black - Negative (any good ground)
Yellow - Signal wire. (speedo harness - usually a pink wire. You will need to confirm this)

 

Tks a lot S.D.M.F., but i'll try to do it by myself, so:

Red - Positive (Switched Acc power) (WHERE IS THIS WIRE? )
Black - Negative (any good ground) OK!
Yellow - Signal wire. (speedo harness - usually a pink wire. You will need to confirm this) WHO OR WHERE I CAN FIND IT OUT?

Sorry anything but i'm new on DIY on my bike

 

You should find all of them on the speedo wiring harness.



Goodluck.

 

Let me see:

Red - Positive (Switched Acc power)(to power on the tach)
Black - Negative (any good ground) OK
Yellow - Signal wire. (speedo harness - usually a pink wire. You will need to confirm this) (this send the sign of rmps)

I saw in the other threads that some wire goes on the coil? Usually the positive

something like that?