Volvo All Engines (2010 Emissions) Fault Code: SPN 2836 FMI 3 PID: PSID 49 Battery 1 Potential 2 (Voltage), Switched

When the ignition key is switched to the RUN position, battery voltage is supplied though fuse 64 to the aftertreatment control module (ACM).

Conditions for diagnostic trouble code (DTC):
1) Ignition switch voltage shorted high

Probable cause
1) Chassis Harness
2) Cab harness