i have done search's and have still had no luck in getting my shift light to work. it is a proform and i have power but i dont know which wire to splice into to get the signal for the rpm's. i found on here that some said the the 13 pin in the red connector for the pcm but i tried that and still no luck. could someone that has hooked one up before please tell me what color connector it is in and what color the wire is. i got it to work by splicing into a wire going to the ignition module but that caused a missfire so i took it off. please some one help me!

 

OBD 1: White wire, red connector on PCM, pin #13

OBD 2 LT1: Same as OBDI PCM

98 LS1: Tach line is Pin 35 on the BLUE connector. Tach line is a white wire

99-00 LS1: Tach line is Pin 10 on the RED connector. Tach line is a white wire


it's worked for me....check all your connections

 

i just reciently tried installing my proform and it didnt work. ive read that a lot of people have had trouble with these. When i hook mine up to the power it just blinks on and off. I checked the web site and it said something about getting a "Zener Diode" to put in line, but i dont know. I e mailed proform and im waiting for a reply, ill let you know

 

i had problems with my LS1 install, called the company and tech support was very helpful

give that a try

 

I Have a Proform it seems to work good other than every once in a while it flashes for no reason. Rechecked all wires and made sure it has a good ground.