WIRING GP-MACHINE 2553983 - Caterpillar

Switches
Switches provide an open signal, a ground signal, or a +battery signal to the inputs of the ECM. Switches are open or closed.
When a switch is open, no signal is provided to the corresponding input of the ECM. The “no signal” condition is also called “floating”.
When a switch is closed, a ground signal or a +battery signal is provided to the corresponding input of the ECM.Implement Lockout Switch
Illustration 6 g03731316The implement lockout switch is designed to control the implement lockout solenoid. The ECM will provide power to the solenoid. The switch is a two pole momentary switch. When the machine is started, the implement lockout switch is engaged. Use the switch to toggle between LOCKED and UNLOCKED. The ECM disengages the implement lockout solenoid when the switch is placed in the LOCKED position. The switch should be in the LOCKED position before any of the following conditions occur:
The operator exits the machine.
The machine is serviced.
The machine is left unattended.The switch affects the system in the following manner:LOCKED - The implement lockout solenoid is de-energized. The implement system is no longer operable.UNLOCKED - The implement lockout solenoid is energized. The implement system is enabled.The switch is a two pole switch. The switch has a normally closed contact and a normally open contact. The ECM can always determine whether the switch is in the LOCKED position or the UNLOCKED position. The two input circuits are used for diagnostic purposes. The ECM will detect a failure in the circuit if the two circuits of the switch are ever in the same state. The ECM will also record a diagnostic code.Increment and Decrement Switch
Illustration 7 g03731176The increment and decrement switches are single pole switches. Both switches have a normally connected and a normally open contact. When the switch is not depressed the normally connected contact is connected to the return, and the normally open contact floats to a high voltage state. When the button is depressed, the normally open contact is connected to the return and the normally connected contact floats to a high voltage state. Based on the voltage state of the two ECM contacts, the ECM determines if either of the buttons are depressed. The buttons control the increment and decrement blade height function and power pitch (if equipped). Fourth Function
Illustration 8 g03794670The switch is two directional. The switch has three pins that connect to the ECM. The fourth function is normally controlled by the lever. The use of this switch allows the lever to be used for a separate function. This switch could be used in order to operate the fire plow. Depressing and holding the switch in one direction actuates the raise solenoid for the fourth function. Holding the switch in the other direction actuates the lower solenoid for the fourth function. This switch allows control of the fourth function.Outputs
The ECM responds to decisions by sending electrical signals to the outputs. The outputs can create an action or the outputs can provide information to the operator or the service technician.Proportional Solenoids
Illustration