Cummins ISX11.9 CM2250 – Service Manual 019-080   Remote PTO Switch

General Information

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A remote PTO switch is available for applications where PTO operation control is desired away from the operator controls.

The remote PTO switch circuit consists of the remote PTO switch signal wire and a switch common return.

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Resistance Check

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Locate the desired ON/OFF toggle switch.

Remove and tag the two connectors from the terminals on the switch.

Touch the multimeter probes to the terminals on the switch.

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Move the switch to the OFF position and measure the resistance. The multimeter must show 100k ohms or more (open circuit). If the circuit is not open, the switch has failed.

Replace the switch. Refer to the OEM troubleshooting and repair manual for the replacement procedures.

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Move the switch to the ON position and measure the resistance. The multimeter must show 10 ohms or less (closed circuit). If the circuit is not closed, the switch has failed.

Replace the switch. Refer to the OEM troubleshooting and repair manual for the replacement procedures.

If the resistance value is correct, the switch must still be checked for a short circuit to ground.

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Check for Short Circuit to Ground

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Touch one of the multimeter probes to one of the switch terminals. Touch the other probe to chassis ground. Move the switch to the ON position and measure the resistance. The multimeter must
show 100k ohms or more (open circuit). If the circuit is not
open, the switch has failed. Replace the switch. Refer to the OEM troubleshooting and repair manual for replacement procedures. If the switch passes all of the previous checks, the circuit must be checked for an open circuit, a short circuit to ground, a short circuit from pin to pin, and a short circuit to an external voltage source.

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Last Modified:  08-Apr-2003