[supradaddy0803]

I went through this Tach issue and just ended up replacing it with a aftermarket one. The wire you looking for comes off the ignitor box and wires straight to the back of the gauge cluster. This wire is black and gives the tach its signal while there is two other wires involved in the tachs system the black one is the signal from the ignition system that moves it. The plug on the gauge cluster you are looking for is the one right behind the tach and the black wire is like the 6th or 8th one from the door over. Easiest way is to trace out the copper on the board on the cluster and see where it goes. The nice thing is n/a 7M's, 7MGTE, and 1JZ use the same wire to get a signal just in different spots. As for the connection comming from the hood to the dash for this wire look at the connector that runs up into the dash not the lower two it sits up in the dash and runs over to the cluster on a 1JZ it is the IG1 connector on a 7m it is MA2 but not sure it has like 10 or 12 pins you will see the black wire in it it is the only one. As for the window issue the wondows dont run off a fuse they are a straight shot. Check the window switches if the driver side switch goes bad then they both dont work just remember that it gets all the power to run to the passenger side.