ok i read it says to hook signal wire from gauge to the white w/ red stripe but i have a 94 ls with gsr swap and in my wiring i see 2 white/red wires but 1 has grey spots on it about every inch and i dont wanna tap into wrong 1, which 1 do i use?? thanks for any of the help in advance!!

 

stupid question but what ecu?

Just find out the ecu pinning and go off that?

 

chipped p28, but still same pinout as stock but i got it figured out, it is 1 w/o the grey spots!!