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I had a pretty good lot of NOS tachs about 18 months ago (149 to be exact). It took me a year, but they are all sold. You may have success finding one on the big “e” auction site that rhymes with “pay”

One guy bought a tach from me early on and was going to try an install on a CUCV. I never heard back from him, so I don't know if he got it to work. The challenge is to find a clean RPM signal somewhere. The schematics seem to indicate a feed available on the alternator. But again, I'm not clear...

I've not had any I've sold returned as DOA. I'd advise checking grounds and signal wire connections. Are you also sure you have "keyed" power hooked up right? Either way, I've got a replacement unit headed your way. I wanted to make sure you've got a good one in hands when you dive back into...

How did it go?

Thank you Wagnum! Here is the video of your tach installed and working. Please post pics of your mounting solution. I am interested to see what you did on the driver's side A pillar. https://youtu.be/r1AjAhx2Aw8

Wagnum, here is part of the description from the first post: One wire (assuming red due to process of elimination) is for keyed power. The other should tie into another gauge light wire to provide illumination. Blacks are are ground and he used the other colors for tach pulse signal. I would...

PDF from AM General I have a PDF from AM General showing tach signal attachment to the alternator. For some reason, I can only upload page one of the 2-page PDF to my photos. PM me your email address and I'll send you a copy. EDIT: got them separated. let me know if you still want an emailed...

Lot is in my possession now. Photos and more information available here: http://www.steelsoldiers.com/showthread.php?153679-HMMWV-NOS-Tachometers-Made-in-USA&p=1867527#post1867527

Was there a need to idle the engine up while parked to provide adequate power for certain accessories associated with the ambulance? I could see a tach and a throttle lock being used for that purpose.

Very nice work hmmwv1! I have been wondering how these hook up. Great work on the mount too. FYI I'm picking up an auction lot of GL parts soon that contains a bunch of these tachs. I'll have them listed in the parts FS forum next week. Anyone needing one can PM me.