Is there a preferred method / process for setting up free play on mid 70"s Bally EM. For the longest time mine had had one of the wires disconnected from the credit wheel step unit - the decreasing coil mechanism - the credit wheel stays stationary obviously and the game starts with just the front door push button. If I connect the wire it adds credits when coins are added- and decreases as they are played and the credit wheel and game operate in what appears to be proper procedure as well. I suspect this is not the way others have made their games "free play" so was interested in feedback. Thanks

Thanks Tomass & currieddog. Very helpful info. Not sure why mine was done by removing the wire to the "step down" coil lead but I like the idea of all components (other than the adjusted switch) working properly on the machine- will make the correction

So interesting development.... as the credit wheel hadn’t been being used it obviously was sluggish just when manually activating it- took to cleaning it - it did have some muck buildup but wasn’t awful- nonetheless cleaned up the cog wheel shaft et al - other than swinging the switch stack out the way so cog wheel could be removed/cleaned didn’t touch anything else - now no response at all when i hit the credit switch on the front door- this has worked flawlessly for many years - if i drop coins in the either chute credits get added - but no startup when I push switch - either with credit wheel at 0 or showing credits (and credit light on apron comes on)
So I’m thinking some how I must have misaligned switches on the stack - there is a third switch between the credit switch and the credit limit switch (unlike the photo in the em repair link above) - but they appear ok

Any thoughts as doesn’t seem like it could suddenly be anything else?

Turns out a wire came free .....on the zero credit switch there is a grey/yellow wire (93 on the schematic)- the other end is now free - i cant seem to follow/trace where this other end came off- based on proximity would appear to be one of the other switch lugs but having hard time figuring out where