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TN riverjet this tach has a plug on the back instead of separate terminals a hot lead a ground awire for red ellumination and a diff. wire if you want reg. light then another trigger wire but only that one trigger wire the unit is made for 12 or 24 volt made in japan or china . Not...

thatsounds easy enough but I only have one trigger wire on this tach plus keyed hot and ground and light so still stumped?? mogger7

what are the chances that the transducer on the rear of the Humvee block is only used when the plug fwd of the transfer case shifter is connected to a shop diagnostic machine and uses the transducer for their rpm readings or rpm adjustment. maybe that's why ther is no power on the 2 wires if...

try'n to hook up this tach I got and the transduser on the back of the block shows no voltage on either wire . what should I be look'n for mogger7

been look'n for a tach like the one at the top of this thread but haven't found one looked on e-bay and a few other places anyone have any ideas? bunch of cheat ones on e-bay but all from china Mogger7

where did you get you tach and how is it triggered. Rich