external tachometer

**B2BTOWPRO** · 10-01-2008, 03:07 PM

adding external tach w/ shift light???????? can i leave factory tach hooked up, where do i pick my signal up? only has red,blk,yel,grn ,wires out of tachometer

**ls1camino** · 10-01-2008, 04:21 PM

Originally Posted by B2BTOWPRO

adding external tach w/ shift light???????? can i leave factory tach hooked up, where do i pick my signal up? only has red,blk,yel,grn ,wires out of tachometer

Auto Meter?

Red = Ignition
Black = Ground
Green = Cylinder 1 Coil Pack Power (Purple)
Yellow = not sure

**2001NBMZ28** · 10-01-2008, 04:46 PM

Yea you can leave the factory tach functional, not sure what yellow is either, maybe for the light? Anyway the tach output siginal wire on a '98 is pin #35 white wire on the blue connector: www.ls2.com/boggs/torques/98pinpcm.htm