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Message: <blockquote data-quote="Pinballjoe" data-source="post: 79796" data-attributes="member: 11435"><p>I bought this 763 about 4 years ago. I'm retired, so it's not like I need the machine on a daily basis, so I've been picking at the issues, little by little. One of the last problems is the backup alarm. I jumped it, and found it was dead, ok, so I bought another one, same numbers, etc. This one, is on ALL the time. The schematic is useless. It points to C102, which goes to the backup alrm switches. Great! No help to me! I raised the cab today, figuring I'd meter the two switches. so I did, they close when the switch is closed, and visa-versa. I did see they are in tandom with each other, which made sense. So, my question..........what's the next logical thing to check??? It's not possible to wire the backup alarm backwards? is it? I'm figuring the switches introduce the ground, and something else is doing that job.........short? Thanks for reading this!!! Joe</p></blockquote><p></p>