unit will power up but no functions - Technical Troubleshooting discussion in Forkliftaction's forums

JLG 1930-ES:
unit will power up but no functions

was having down issues after finding chafed harness in scissor arms to platform it tripped the breaker a a few times at the ground box and lost all control functions except down. repaired wires still nothing flashing 6-6 on platform box tried new harness still nothing tested powers and grounds at power module in front of lift everything good there. at the 12 pin conector plugged in 20ohms at pin 10 and 11 and 120 ohms unpluged am i pulling my hair out with this any help would be great

Posted 15 Apr 2025 22:22
Discussion started by Marcas_Belanger
Maine, United States

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Ok...do troubleshooting in manual for 661...if everything passes 662...it will tell you what needs replaced for sure

Posted 18 Apr 2025 12:16
Reply by Matthew_Reed
New York, United States

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Yes I have analyzer. I have tried resetting model number only code I get after everything I try is the 661

Posted 17 Apr 2025 19:34
Reply by Marcas_Belanger
Maine, United States

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If it's your lift..invest in an analyzer...it will allow for specific codes..and give better options for troubleshooting...try unplugging both drive motors..and then disconnect ground..reconnect after 30 seconds...see if operates up/down from lower controls...if code comes on...then you would normally next use analyzer to change model and country of origin...restart machine..then change back to reset to original setup

Posted 17 Apr 2025 13:51
Reply by Matthew_Reed
New York, United States

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