Tach Problem

[Vtwin650]

Does anyone know how the tach works?
It is the one thing on the barnhawk that refuses to work.
it now does nothing?

[Vtwin650]

bump...

just checking if anyone knows about the tach?
any way to test why it is not working, etc...

thanks

[JR]

Have you posted a message on:-

http://www.hawkgt.com/

[ponley]

There are 3 wires on the tach, one is hot from the ignition switch, one is ground and one is signal from the ignitor unit. Black with a brown tracer is power from the #4 fuse, Yellow with a Blue tracer is the signal from the rear coil/ignitor unit, and Green is the ground.

1. Connect the clip of a test light to the positive battery terminal and probe the Green wire on the back of the tach, the light should light.

2. Connect the clip of the test light to the negative battery terminal and turn the ignition switch on, now probe the Black with Brown wire on the back of the tach and the light should light.

3. If everything is good so far you can connect a dwell tach meter (test equipment available from Sears automotive or similar) to the Yellow with Blue wire on the back of the tach and it should read engine rpm.

If you still can't get to work then post the results of the 3 test above and we'll see what we can figure out.

[Soul]

And, do you have a shop manual for the bike?
I have swapped out housings for the speedo and I have learned a little bit about hooking it up right..but, not much. ehehe

[Vtwin650]

ponley...

thanks for the great info - that is very detailed.

I am heading out to the garage to check it out now!!!