Category Archives: 1025R

John Deere – 1023E, 1025R and 1026R – Coolant Temperature Sensor Test

[1] – Park machine safely. [2] – Allow engine to cool before servicing the cooling system. [3] – Remove coolant temperature sensor. (See Remove and Install Coolant Temperature Sensor in Section 20, Group 10.) [4] – Suspend sensor (A) in water and coolant mixture. [5] – Bring water and coolant mixture to specified temperatures while… Read More »

John Deere – 1023E, 1025R and 1026R – Oil Pressure Switch Test

[1] – Park machine safely with park brake locked. [2] – Disconnect wire (A) from switch. [3] – Use ohmmeter to check continuity between switch terminal and ground. →NOTE: Be sure to apply Pipe Sealant with TEFLON TM to threads of switch anytime it is installed. If continuity is present between terminal and ground with… Read More »

John Deere – 1023E, 1025R and 1026R – Relay Test

[1] – Remove relay from load center. [2] – Use ohmmeter to check continuity between relay terminals 87A and 30 (D and C). [3] – Check for no continuity between terminals 30 and 87 (C and E). [4] – Measure resistance between 85 and 86 (A and B). [5] – Connect a jumper wire from… Read More »

John Deere – 1023E, 1025R and 1026R – Horn Switch Test

[1] – Disconnect switch. [2] – Use ohmmeter to check continuity across switch terminals. a. If continuity is not present between terminals listed for each switch position, replace switch b. If continuity exists between terminals not listed for each switch position, replace switch.  

John Deere – 1023E, 1025R and 1026R – Neutral Switch Test

[1] – Park machine safely. [2] – Disconnect wiring harness from switch. [3] – Attach ohmmeter leads across the switch terminals (A). [4] – Shift the transmission range to high or low. – Range in gear position: no continuity – Neutral position: continuity [5] – If continuity is not correct, drain the transmission and remove… Read More »

John Deere – 1023E, 1025R and 1026R – PTO Solenoid Test

[1] – Disconnect Y03 solenoid connector. [2] – Use ohmmeter to check continuity across terminals. a. If continuity is not present between terminals listed, replace solenoid b. If continuity exists between terminals and housing, replace solenoid. [3] – IMPORTANT: Check solenoid for secure connection. Reconnect solenoid. Confirm connector seal is not damaged. Verify that locking… Read More »