Mac,
They are in there, just not sure if they work right
I think they are right? I guess it's been 33 years so they may have been cobbed in but the manual suggests a part number I can't find anymore.
That's correct. It's set to the "slowest" setting, highest number. Slowest accel and decel.
Update:
Upon inspection, the unit has 2 wirewound resistors. Both 150W 800mOhm (0.8 ohm). They have the part number gr150w.
They can be found on ebay such as here:
https://www.ebay.com/itm/RESISTOR-GR...UAAOSwG-1WyzBR (I'm sure that link will decay, sorry)
I've found replacements that I believe will work but are the wrong dimensions on Mouser and found that Ohmite will make to order one that is close enough although I don't know for what price yet.
Link:
https://www.mouser.com/ds/2/303/res_280-1265358.pdf
Can anyone suggest a test to make sure these are the problem or help me to decide that they are likely the problem? My understanding is this is where the power goes when braking so it really makes sense as the problem. I'll likely order the ones that don't quite fit but have the correct specs and cobble them in to find out. I'll have some more transistors and fuses on hand of course. That or I just give up on this rusty pile and get something from this century.