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obijuan · 06-06-2017, 08:27 AM

I need to know how to use this OEM tach from a v8 diesel truck into my p pump cummins to throw a curveball. I have the entire cluster with wiring harness with power, ground and a brown wire that goes to an unknown location.

This is a real GM diesel tach and there is practically NO info on how to use it. The cluster was a mechanical speedo 85-87 gmc 7000 with the detroit.

Anyone here have any idea how to use this 8 cyl tach with a 6 cylinder 12 valve?

Thanks

06-06-2017, 08:27 AM	#1
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	OEM diesel 4k tach I need to know how to use this OEM tach from a v8 diesel truck into my p pump cummins to throw a curveball. I have the entire cluster with wiring harness with power, ground and a brown wire that goes to an unknown location. This is a real GM diesel tach and there is practically NO info on how to use it. The cluster was a mechanical speedo 85-87 gmc 7000 with the detroit. Anyone here have any idea how to use this 8 cyl tach with a 6 cylinder 12 valve? Thanks __________________ 1985 k5 396/nv4500/203/205 d60/d70 4.56 42 sx2 1991 V3500 350/4l80/205 60/14 4.10 35 toyos.