So I have a Stern Hot hand and the only thing wrong with it is the big flipper doesn't rotate.

So far I've checked that the replay attached to the large spinning flipper does pull in on game start. I tested for voltages at the relay and get 44v on banded side of the diode and 6v on the non banded side. Non of the other lugs from the relay output and voltage.

I tried to replace the replay with another from a spare solenoid driver board I had and the problem remained the same

I measured for voltage at the motor itself and get nothing.

I had a spare motor from a old FBC, I have no idea if that motor was any good but I tried it anyway just in case and still no spinning.

Then I took a 9v battery and hooked the leads up to the motor to see if it would spin at all and it does.

I'm really not sure where to go from here, any help would be appreciated.

I'm not great at reading schematics

But I think the attached picture is the relay you are talking about.

In attract mode the red wire with the lug on the non banded side of the diode measures 44.5v the double yellow wire on the banded side measures 44.5v as well

When I start the game the banded side stays at 44.5v and the non banded side drops to .645v

No idea what that means :/

15105893928001251088009724865575 (resized).jpg

Here is the picture of the wires attached to the motor

15105907925684480961003238202547 (resized).jpg

I had tried a different relay and the problem was still the same.

The motor does spin when I hook up a 9v battery to it.

The gearbox moves quite freely with my hand.

So the red/green wire on the relay is where the .645v is

But when I test for continuity, that wire does not go to the motor.

The red/white wire on the relay that has 0V on the lug directly below the red/green, that wire is the wire that tones back to the motor.

Could it be that at some point in the games life someone soldered the wire to the incorrect place?

This is what I get in that scenario

15105916705575213733268106247024 (resized).jpg

Like so?

This is the result

15105921628232504462015107417134 (resized).jpg

15105921875071855298046262406294 (resized).jpg

1510592210849997434533086964336 (resized).jpg

So jumper these two terminals?

The flipper doesn't spin, game started or not

15105923627783354948409317101156 (resized).jpg

Also when I ground q18 the relay clicks but the flipper does not spin

That same relay also clicks when I start the game

But I get a different reading in attract mode, the .543 is the reading I get during attract mode

15105929738664794114760954364286 (resized).jpg
15105929940397859905867383187737 (resized).jpg
15105930077024219257923261802334 (resized).jpg
15105930429422232085937029609014 (resized).jpg

Ok, thanks for the help, I'll start looking for the needle in the haystack