SHAFT-HITCH 1J4035 - Caterpillar

G - The signal is pulled to ground.O - No signal or open+B - The signal is pulled to +battery.Note: The last row of the table shows the signals for the special operating modes.
Table 2
Forward/Neutral/Reverse Relay Driver    
Gear     N     F880     C904     G797    
N1     G     G     +B     +B    
N2     G     G     +B     +B    
N3     G     G     +B     +B    
N4     G     G     +B     +B    
F1     O     G     O     +B    
F2     O     G     O     +B    
F3     O     G     O     +B    
F4     O     G     O     +B    
R1     O     G     O     +B    
R2     O     G     O     +B    
R3     O     G     O     +B    
R4     O     G     O     +B    
N     G     O     +B     O    G - The signal is pulled to ground.O - No signal or open+B - The signal pulled to +battery.Note: The last row of the table shows the signals for the special operating modes.
Table 3
Forward/Neutral/Reverse Lamps    
Gear     P915     P914     752    
N1     +B     O     O    
N2     +B     O     O    
N3     +B     O     O    
N4     +B     O     O    
F1     O     +B     O    
F2     O     +B     O    
F3     O     +B     O    
F4     O     +B     O    
R1     O     O     +B    
R2     O     O     +B    
R3     O     O     +B    
R4     O     O     +B    
N     O     O     O    G - The signal is pulled to ground.O - No signal or open+B - The signal pulled to +battery.Note: The last row of the table shows the signals for the special operating modes.Note: The speed outputs from the shift lever can be checked at the diode block. The signal should be ground when the signal is active. The signal should be at a voltage of 5 VDC when the signal is open. All checks should be made with the ignition switch in the ON position.Test Step 1. CHECK THE INDICATOR LAMPS
Use the previous tables in order to verify the proper signals at each component.Expected Result:The correct signals are measured.Results:
OK - The signals are correct. The lamps are faulty.Repair: Replace the faulty lamp assembly. Proceed to test step 2.
NOT OK - The signals are NOT correct.Repair: Inspect the machine harness. If the harness is correct, replace the faulty component. Proceed to test step 2.Test Step 2. CHECK THE FORWARD/NEUTRAL/REVERSE SWITCH
Verify that the neutral lamp is ON.
Use