AutMeter 9117 Tach Adapter for 2007 GT...need HELP!!!

[SintheBouncer]

I have been trying to get this damn thing to work all weekend! I ordered the 9117 Adapter and I am trying to make a 2 1/16" Tach w/ built in shift light to work. I have wired the receiving wire to the C6 slot on the wiring box in the one thats got the neon green cover. I ran the negative to the battery and the positive to it as well. The grey wire is hooked to the green one from the tach itself but all it does is flicker the shift light on and off. The digital RPM screen displays haywire signal and cuts off after a few seconds. I have tuned the tach to .5 since the signal wire to the panel is only sending a readout like that of a 4 banger. I am lost! HELP!

 

[LV51FER]

I'm afraid I'm not much cop on electrical stuff but when I put my Raptor shift light in, I couldn't get it to work and eventually found that shortening the earth wire and earthing it elsewhere fired it into life.

Otherwise, I found it hard to get a good switched live feed. This may help, it may not:
http://www.cardomain.com/ride/2177534/8

 

[bleedingvayneAD]

I have the same shift light and hooked it up EXACTLY like the raptor. And, just like you dd, I also set the tach to .5 to read like a 4 cylinder since it's only reading off of a single tach signal wire.

 

[SintheBouncer]

Im going to give it a try. Thanks for the link!