questionabout air fuel ratio gauge

[sho-tyme]

where does the other wire goto there are only three power ground and another wire i dont have any intsuctions i bought it from a friend that hadnt hooked it up

[pinoyesv6]

the third wire is hooked up for the signal from the 02 sensor..

[Lazarus]

:shock: i can't believe what i just read. yeah what he said it goes to your O2 sensor or to your ecu pin 71 if yu have the I4