CM2150 Electronic Control System – 019-021   Cruise Control or PTO ON/OFF Switch

General Information

TOC

The ON/OFF toggle switch is used to activate or disable the cruise control operation and PTO operation. The cruise control/PTO ON/OFF switch circuit consists of the cruise control ON/OFF switch signal, the switch return, and the OEM cab-mounted toggle switch.

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Resistance Check

TOC

If INSITE™ is available, monitor the switch for proper operation. If not, follow the troubleshooting procedures in this section.

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 an open circuit (100k ohms or more).

If the circuit is not open, the switch has failed. 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 a closed circuit (10 ohms or less).

If the circuit is not closed, the switch has failed. 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

TOC

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 an open circuit (100k ohms or more). If the circuit is not open, the switch has failed. 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:  03-Apr-2003