installing an aftermarket tach on a 99 camaro?
#3
Two different threads that will help you.
https://ls1tech.com/forums/showpost....14&postcount=3
https://ls1tech.com/forums/wiring-stereo-electronics/496034-installing-raptor-shift-light-ls1-f-body.html
3 wire hookup. + , - , and Pin #10 right out of the lower (red) connector on the PCM. It's a white wire that will be tapped and go to the tach signal on your tach/shift light.
https://ls1tech.com/forums/showpost....14&postcount=3
https://ls1tech.com/forums/wiring-stereo-electronics/496034-installing-raptor-shift-light-ls1-f-body.html
3 wire hookup. + , - , and Pin #10 right out of the lower (red) connector on the PCM. It's a white wire that will be tapped and go to the tach signal on your tach/shift light.