i have a 4 inch sunpro tach and want to use the light on it as a shift light. is this possible? can i take the light off and use that? the light itself has 2 wires comin off it... is this all ineed? the tach itself has the red/green/blk wires. any way to use wat i got...

 

you have to use the tach and the shift light together if you want to use it as a shift light.. red pos. black neg.. green is rpm.. you would set the rpm that you want to shift on . on the tach.

 

so how are the aftermarket shift lights wire up if they only have 2 wires comin out? well from the pic i see thats what it looks like.

 

units like this
http://www.autometer.com/media_newsa...1&mo=2&yr=2005
you adjust the rpm at what you want to to blink at. the light is just a light. some people remove it when its annoying

units like this
http://www.modernperformance.com/all...ftlights.shtml
(i have one) only have have 2 wires (pos-neg) wires and you adjust the shift point on the box..

 

there is actually a guy on here that did a write up on taking one apart and making just a shift light so you dont have the giant tach im not dure where the post is but you can probably search and find it

 

Is this the DIY you're talking about? https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-install-variable-shift-light-00-civic-1597461/