Stewart-Warner Tach Wiring ?

[frankslagoon]

I have a model 429370 tach and model 429375 sending unit from the same trk. I want to be sure I wire it correctly the first. live and learn.

[frankslagoon]

Sooo. My question is. Does anyone know the proper way to wire this?

[ray_mcavoy]

The ring terminals appear to be partially obscuring the terminal labels in your photo.

I think the sending unit is labeled "METER -", "METER +", and "DIST.PRI.", correct? And the terminals on the back of the tach meter movement should be labeled "+" and "-".

If that's the case, the "METER -" on the sending unit gets wired to the "-" terminal on the tach. And similarly, the "METER +" on the sending unit gets wired to the "+" terminal on the tach.

That leaves the "DIST.PRI." terminal on the sending unit. I believe that gets connected to the negative side of the coil.

Just to be on the safe side, you might want to see if you can find an original instruction manual. Here's a listing on ebay for a re-printed copy that should cover your tach/sender model --> http://www.ebay.com/itm/DETAILED-ALL...-/130620239787

[frankslagoon]

that ebay post is gone now. of course. I think your correct also but I'll keep lookin just to be sure. I'm not in a hurry and it's a cool tach to just burn up

[ray_mcavoy]

Originally Posted by frankslagoon

that ebay post is gone now. of course.

Strange ... I just double checked the link and I'm still seeing an active listing. Shows 6 available / 37 sold.

[frankslagoon]

I found the ebay listing. for some reason my ph. said no go but the home pc brought it up. thanks

[Boatracer]

Did you figure this out? I have the exact same setup and I'm trying to figure out how to wire it properly using an MSD dist.