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I have the switchbox tach housings with harness and generic mil surplus tachs that fit. They dont plug directly into the harness you would need to wire the tach to the harness.

Regulator box on alternator/ Front red terminal is 24v regulation. It divides to do 12v regulation. White terminal on back of regulator is ac output. This can be used to drive a tach.

There is a small harness that plugs into the dash harness and provides the connectors for the upper box switches and tach. It's in the parts tm. All trucks have a pickup the trans control uses it. You can drive a universal tach off the alternator regulator ac terminal.

The alternator ac output on the regulator can be used to drive a tach. The datcon universal tachs I have may work off the ecm signal.

That being said I do have universal tachs that will work with the lmtv. They are 12/24 volt Datcon 4000rpm ones with hour meter. They can be adapted to most vehicles and are mil surplus.

12414345 but its a first gen truck part. No tach in A1. Winch on the computer kicks the idle up automatically as stated above. Will

The troubleshooting tm states which pins to check if there is a problem with the tach that should be a good starting reference.

I am in the process of pulling a trans right now. It's larger and heavier than I originally thought. Unless you are lifting it out the top I am thinking a very large transmission lift would be in order. I measured the trans I am thinking either the truck has to come up a few inches or the trans...

No sorry I am going to use that one. It's a Medallion tach they make civ ones that are almost identical. The Internet is full of them.

The A1 is computer controlled throttle no hand throttle to rpm up when winching.

Is your winch truck a first gen or A1.

I dont have much A1 experience my A1 truck has collision damage. I believe there is a trigger lead that kicks up the rpms with winch engagement after the pto is engaged. Matt in MI has a complete winch setup he listed for sale it is a first gen though. The A1 manuals are interactive on the diag...

The A1 winch truck that I have did not have a tach. I believe this is due to electronic engine rpm control. Less operator options.

Probably piggybacks off the trans harness somehow. The manual dosnt show a different harness for winch trucks so there is a good possibility the connection you desire is tucked away somewhere in the dash or behind the heater. Pic below is what the connector should look like. A tach signal should...