FF6 JLG code 7742 improper field voltage no functions

FF6 JLG electric scissor lift code 7742 improper field voltage and no functions, we will show you what this code means and how to make the machine operate good enough until you can get the repair parts to fix it properly. This covers all JLG electric scissor models 1230,1930,2632,2646,3246ES, 1932,3248RS and many more. This failure is relatively common and this repair is a good one to know it will save you a lot of time and headaches.
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[@JS-6769]

Thank you.
My machine is 3246ES, and it helped me a lot
I subscribe to it
Korean engineer

[@VinylVillageGarage]

That is great! Thank you

[@Nietsche_BR]

Thanks for the video!

[@VinylVillageGarage]

Cool. Very welcome

[@jamesforehan2809]

Good job!!

[@VinylVillageGarage]

Thanks!

[@traveler390ktm5]

Thanks amigo

[@VinylVillageGarage]

No problem, very welcome and glad
To help.

[@daves8111]

Was wondering if an analyzer would tell me the issue with a generator that isn't giving voltage to the platform on a 800aj .thank you

[@VinylVillageGarage]

The jlg analyzer won’t tell you sky power Gen output. It will let you set engine RPM to fine tune the voltage output. Sky power can be diagnosed with a volt meter. Most of the time it ends up being one of the circuit cards or the generator itself. Do you Have a voltmeter?

[@daves8111]

@@VinylVillageGarageyes I do ,I'll check it out thank you for your reply!

[@reecehomes2227]

Have an issue where running a motor by itself it works but as soon as they are both connected machine throws 7742

[@VinylVillageGarage]

That’s is interesting, the motor controller is looking for a voltage signal return between f1 and f2, of its too low it will set that code. Has to have resistance issue in the motors is my guess. test the resistance of the orange and blue wires on each motor of one is way higher that might be the issue. The
Next thing I would inspect is remove the motor from the drive hub and see if water sometimes very rusty dumps out of the motor.

[@reecehomes2227]

@@VinylVillageGarage resistance across the orange and blue wire, I have continuity across them on both harnesses

[@VinylVillageGarage]

@@reecehomes2227 yes continuity is one thing but resistance is another. If one motor has like 25 ohms and the other has like 50 that motor is probably the issue.