Where the best place to connect to the Tach signal wire. I have an 06 Deluxe EFI . Don't want to take any unnecessary chances. Thanks

 

Need some more info: was the tach stock, or add on; guessing you have the 88 TC? Do you have the service manual?

 

Its an add-on. My manual doesn't list a "signal" wire. I'm assuming it means a + connection, but want to make sure before I go further . Yellow/Black

 

The is a tach output on the ECM. Haven't tried using it tho..

 

Tach comes off ECM, that tach you have is an analog tach and incompatible with EFI bikes. You need one that will have a Y splitter from the speedo or get the HD speedo with a tach on it.

 

I think you are trying to say the Tach needs to interface to the serial bus to get RPMs.. As far as I can tell the 06 ECM still has a Tachometer output which should be 1 pulse per rev.

 

The tach signal is already at the speedo connector even though the wiring diagrams do not show a wire from the ECM pin 3 but it is a digital output signal not a ppm signal as you would get from the coil connection. There is not a good point to tie into the BE/O wire on the coil to get an analog tach signal.

 

Well, if that's the case the y cable to the coil primaries is the only answer for that tach.

 

I can make the splitter with a couple resistors and diodes. I will try the signal hook up qt the ECM.

 

The tach signal wire is usually pink if that helps.