So I'm working on a Gottlieb Jet Spin and the voltage at the score motor is only about 20v voltage at the fuse it is 25v. The score motor will try to run but just sits there and buzzes if I help it along it will spin but slower than it normally would. It looks as though the voltage travels through about 12 relays before getting to the score motor jack if I'm reading the schematics correctly maybe im reading it backwards. My plan was to check voltage along the path to see where I'm loosing the 4-5 volts. Not sure if anone has a easier method. The score motor ohms out correctly so i dont think that is the issue.
Thanks,
Joe

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Voltage is correct at the Bounce switch. More work needed.
Joe

Update!!! replaced the score motor motor and the game over relay it was not working. I'm pretty sure it was the game over relay pulling the voltage down but already had the motor 75% out so replaced that too. Only issue now is the coin unit wont reset back to its starting position at the start of a game it will advance but not reset.
Joe

HowardR I was able to fix the coin unit it ended up being the AX relay. I adjusted it many time but those things can be a PITA!!
Joe