Express 2500 V8-6.6L DSL Turbo (2010)
1. Ignition OFF, disconnect the harness connector at the high idle switch.
2. Test for infinite resistance between the signal terminal C and the ground circuit terminal A with the switch in the open position.
‹› If less than infinite resistance, replace the high idle switch.
3. Test for less than 1 ohm between the signal terminal C and the ground terminal A with the switch in the closed position.
‹› If greater than 1 ohm, replace the high idle switch.
