Stereo & Electronics - 96 camaro Gauge problem

im doing alot of weight reduction and i started removing wires, so far i have removed the cigarette lighter wires, TCS, Airbag, Ebrake, seatbelt, console light, radio (passenger side only so far with the antenna) and alarm sensor thats above the passenger side rear tire. i plugged my gauge cluster back in and my oil pressure and voltmeter are bother working but no temp and no tach (dont know about speedometer because the car still has no seat in it) i traced the tach signal wire from the cluster all the way to the PCM and its still intact. also traced the grounds and theyre good as well. any ideas?

anyone? hooked the alarm sensor back up thinking maybe it was something with the BCM but its still doing the same thing