Tach is not working HELP

[Philskat]

Ok jumped on the bike last night took off and noticed the tach was not working no big deal i thought but i was on my way back to work so just went with it. Today rode back to work came home and started tearing into it but i am wiring illiterate i got the diagram out but can not figure it out the orange wire has power the ground is grounding but nothing on the black/red wire. I cleaned the conections and threw on another cdi and still nothing the bike still runs great full power but no tach any help i would greatly appreciate.

Philip

P.S. it is a 90 600

[Philskat]

ok i pulled the side cover off and checked the pickup or signal generator what ever you want to call it and everything looked ok but still no tach any ideas?

[Philskat]

anyone is it common or possible for the tach its self to just die

[Black_peter]

The tach is just a motor.
Ground, power and signal from the CDI. The signal gen and CID are probably OK as the bike runs. Look at your connections.

[Philskat]

is there a way to check if i am getting the power from the box to the tach the black and red wire thanks the orange and ground are showing power all the way to the tach

thanks
Philip

[Philskat]

So i cleaned and put dielectric grease in all the connections but still nothing any ideas please

[MrBrant]

probably a stupid question: when you checked the tach wire to the gauge, was the bike running?

I would also try it with your meter on AC mode as well as DC.

Also measure it when the wire hooked up to the tach, as well as it disconnected. (tach gauge might have blown up and is shorting out the signal wire)

[Philskat]

yep bike was running will try it on ac and dc again

[Philskat]

Ok so it seems as though the wire is good and getting signal so i guess the tach is bad itself

[Islandsteve]

I had the same problem. Tried to fix everything,,,wasnt the tac, wasnt the wiring.

I traced the circuit from the tach to the CDI and found it to be corroded. And then my gas meter stopped working as that contact corroded. The part ( 3/4) of the CDI cpu that wasnt corroded controlled such things as ignition and everything else that was still working. So I replaced the CDI and it fixed everything.

[Philskat]

allready cleaned all connections and changed cdi

[bob393]

When my tach got funky it turned out to be one of the screws that hold the wires on the back had come loose, just a bit loose too. But that's what fixed mine?

[phroziac]

I had the same problem. Tried to fix everything,,,wasnt the tac, wasnt the wiring.

I traced the circuit from the tach to the CDI and found it to be corroded. And then my gas meter stopped working as that contact corroded. The part ( 3/4) of the CDI cpu that wasnt corroded controlled such things as ignition and everything else that was still working. So I replaced the CDI and it fixed everything.

My gas gauge always reads on full, even when the bike is shut off. Is that what yours did? Where was it corroded? On the cluster itself?

[Philskat]

Update got my new used tach from sporty_drew and i now have a working tach again