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| | | Forums66 Topics128,012 Posts1,055,313 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#89285 01/28/2004 5:07 PM | Joined: Apr 2002 Posts: 146 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2002 Posts: 146 | I got an old diesel truck tach for $1. The unit looks in good shape 0 to 4000 rpm. Its a three wire 12volt type. Does any know what the input signal should be to make it work right? I'm guessing its 1 pulse for 2 revs.
if it dosen't need fixed, break it
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#89286 01/29/2004 3:14 AM | Joined: Apr 2002 Posts: 1,571 Shop Shark | | Shop Shark Joined: Apr 2002 Posts: 1,571 | Look at AutoMeter's web page. They have information on how to hook up just about anything they have ever made, and I'm sure something will be close to yours. At least it should give you some ideas. | | |
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