View Single Post
tclyder tclyder is offline
Registered User
Join Date: May 2003
Location: Wheeling, Illinois
Posts: 48
Send a message via AIM to tclyder
Angry Tach not working

I am in the process of replaceing all the guage faces with white guage faces and that is going great.

But I have a problem with my 1985 early 944's tach - it does not work The MPG guage works but not the tach

I bought another tach off of ebay and switched them and when the ignition is in the on position it reads 1000 rpm, off - 0

When the car is started i get nothing it stays at 1000 rpm.

the PO told me that he had the alarm disable and that would cause the tach not to work. He said a green wire was cut.

I have also read in other postings that if the green wire is cut in the alarm circuit it disables the tach.

Now that I have the tach out i can see the wires in the back and every thing looks fine.

I need to trace where this green wire goes to. I also know that the tach is driven by a timing pulse from the DME. Does this connection have a "Green" wire in it?

I want to make sure the tach works, either the one that came with the car or the one I bought before I take it apart to put the new face on it

Does any one have any idea as to where this "Green" wire may be cut? Does it go to the coil as well?

Thanks Tom

Our Car is a early 1985 944 with a manual trans
Old 10-01-2003, 12:42 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)