HOSE AS 3458022 - Caterpillar

Illustration 1 g00507588
Schematic of the Air Horn Solenoid This diagnostic code is recorded when the VIMS interface module reads the signal voltage of the solenoid and the voltage is high. There is a short to +battery in the solenoid circuit.
CHECK FOR SHORT TO +BATTERY
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the machine harness connector from the VIMS interface module.
Measure the resistance from contact 31 (wire E785-GY) to the +battery contact 1 (wire 113-OR) of the machine harness connector.Expected Resutls:The resistance is greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. The solenoid harness is not shorted to +battery. Proceed to 2.
NOT OK - The resistance is less than 5 ohms. The solenoid harness is shorted to +battery. Repair the machine harness or replace the machine harness. STOP.
CHECK FOR SHORT TO OTHER SOLENOID OUTPUTS
Measure the resistance from contact 31 (wire E785-GY) to the other solenoid outputs of the machine harness connector.Expected Results:The resistance is greater than 5000 ohms. Results:
OK - The resistance is greater than 5000 ohms. The solenoid harness circuitry is correct. Inspect harness connector contacts. Reconnect the harness connector to the module and check the message center for the same diagnostic code. If the diagnostic code is present, the interface module has failed. Replace the module. Refer to the Testing and Adjusting, "Module-Replace" section. STOP.
NOT OK - The resistance is less than 5 ohms. The solenoid harness is shorted. Repair the machine harness or replace the machine harness. STOP.