My 91 na was giving me a low coolant light and annoying buzzer. I found out the the low coolant sensor wire is not connected to anything. The sensor was connected to a wire, but that wire is broken and I can't see where it was supposed to go to. Does anyone have an idea on how to rewire this?

 

You'll need to find the wire. On my S4, the wire runs down near the airbox on the passenger side.

 

Yeah I had to take off the air intake and I found it went around towards the passenger side and thats where the wire broke and and can't see where the other piece is at...

 

It should branch off of the front harness, which is going to be tucked under the plastic pieces in front of the radiator. Remove the overflow tank and plastic panels, then see if you can find the harness-end of the wire.

 

Alright I will check that next.

 

IIRC until then to stop the buzzing (if you don't mind and you have a buzzer constantly going off) you should be able to ground the wire out against the chassis. Been a long time since I did this so I may be forgetting something important. =)

Edit: Download the FSM or Wiring diagram for your car and it should help you find what you are looking for.