This 2004 Yale Electric Pallet Jack is a model no. MPB040EN24T2748 S/N B827N13699B

I bought it from a private party and they said the drive motor was bad and was determined by their mechanic (not a forklift technician).

When I got it back to my shop, it all worked but I notice a rough, kind of whiny sound in the drive motor. And the next day it all worked until I drove it 20 feet or so and it all stopped working, everything. A Code AL 10 showed up.

I didn't have time yet, but a good friend of mine that refurbishes hundreds of walkie stackers per year always told me to check the brushes first. So I need to do that, I also know what the brushes should look like and if they need replacing. I just have to find out where to look.

So I am kind of jumping the gun right now. But I wanted to see the comments I may read so that if the brushes are good, what is next? I guess checking the drive motor for continuity?

Please advise on code AL 10 and anything else that will help me.