92 W250 OEM tach plug.
#1
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92 W250 OEM tach plug.
The factory tach plug on my 92 cummins W250, has 4 wires, Gray, Orange, and two black wires, are the two black wires 12 volt, one constant and one ground?. is the gray for signal, and orange for tach light, thanks, George.
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George Tucker (11-06-2016)
#7
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I'm using a 3-3/8" isspro w/hour meter off that harness. Set the dip switches for 2 pulses per rev. Seems to be somewhat accurate although it has a significant flutter at idle. I could probably correct that with a capacitor or some other filter.... or I might just mount a dedicated pickup to read flywheel teeth.
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#9
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#10
I run this tach as well. Also white and yellow wires had to be swapped.
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