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Ipac2 Wiring Issues, Then Some Buttons Changed in Mame???
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NoOne=NBA=:
Provided Happ hasn't changed coin switches, you can use your wiring #1, but move the coin door wires to the points indicated in the pic below.

Those are the Normally OPEN (NO) contacts on those switches.

To be absolutely sure, you can slap the leads from a continuity meter onto the two tabs you used.
It should beep when the lever is not pressed, and stop when it is.
The ones I marked should NOT beep unless the lever is pressed.

Basically your Ipac is currently seeing those buttons as stuck down because the terminals are grounded at startup.
RoninEditor:
I haven't checked this thread in a bit and sure enough, you're correct.  Andy just told me the same thing, with Happ's switches being opposite of the usual ones... grrrrr.  But hey, it now works!!!!! 

I'll attach my wiring picture which is the same as yours though.
studmuff:
I had to send a thank you to everyone in this thread.  I wired my coin door to my keywiz with no problems.  Thank You.   :applaud:
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