This is what my manual says. (-) Neutral Safety Switch Input. Connect this wire to the Park/Neutral switch in the vehicle. This wire will test with ground with the gears selector either in Park or Neutral. This input MUST rest at a ground in order for the remote start to operate. You may also connect this wire to the Parking Brake Switch. I have a 95 acura integra automatic if you can help with what wire it is.

 

wire from the parking brake. if it is auto may wont hurt to just ground it.

 

Install a switch on the lead to supply a ground and the switch can be used as a service switch without putting system into valet. 94