2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 297Get this manual
Chassis Electrical System ForwardReverse Limit Switch Circuits
The forwardreverse switches allow the ECU to determine the position of the shift fork inside the chaincaseIn forward, the forward limit switch is depressedWhen depressed, battery voltage is routed to the ECU via the forward limit switch signal circuitIn reverse, the reverse limit switch is depressedWhen
depressed, battery voltage is routed to the ECU via the reverse limit switch signal circuit