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I am wanting to add a Tach to my rig. Looking for suggestions, the 2001 dash doesn't fit/look decent in the 47 cab.(Sarcasm) I will either mount it on
the dash itself or the steering column.
The FEW Diesel tachs I did see used the alternator as the source for the rotating signal.
Could I tap into the PCM for this signal instead, or just use what the aftermarket kit has? Has anyone done this before?
Yes, there is a tachometer signal that comes from the PCM. One caveat, you can't use a standard 4/6/8 tachometer with the signal that comes out. The best luck I've had is with the programmable VDO tachometers (with the DIP switches). I use these in the 73 F100 and Crown Vic.
stock 7.3 gauge cluster Back of the factory tach cut down version
Thanks Sous, and all that have replied. I was looking at the VDO tachs,and adapters, and thought "Hey *******,you ALREADY HAVE a working tach" use IT!
After a bit of taking the cluster apart here is what I have.
Looks like a piece of 4" tubing and a bit of work to make a "Cup" to hold this,
a few wires soldered on and connected to the PCM, I will be as accurate as FoMoCo built the thing.
@z31freakify that looks like lots of good info in that build, thank you for pointing me in that direction. I've been on the road working this week, and very,very busy ( stuff that pays the bills and all)
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