Join Date: Dec 2008
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Some early 92's didn't come with tach provisions. The plug to look for is a flat 4 wire black colored plug. It should be to the left side of the column. It might be hidden up behind the headlight switch.
Now for tachs that work with the Dodge signal. Isspro
makes a couple of tachs that work. Westach makes a couple. Tiny tach is another option.
AutoMeter does not make one that works with the Dodge harness/signal.
Dodge gave us a 5 volt signal for the tach output. That is why most tachs do not work on the Dodge setup. Most tachs can not read that low of voltage signal. There are some converter boxes that could read the signal and power a tach.
93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, HX40/16, G56 /SBC Con-OFE, 307's axles' 2" skyjacker lift, B&W flatbed