Hey friends. I have been hesitant to ask for help with this as I was hoping to figure it out myself, but with the combination of lack of knowledge and being locked in the house due to Covid here I am.

I have a 1974 Gottlieb Big Brave that I am having an issue with. I am going to follow the format in the stick to post the issue and information to avoid any crankiness toward me. Take it easy on me and I thank you in advance.

I have had the machine for a few weeks. As far as I remember the bonus did not stick when I played it at the family friends house I bought it from. The issue was apparent as soon as I moved it and powered it up.

The game came from a family friend that was really into EM's and does nice shop jobs on EM pins, and all the folks on here that he has sold pins to have had good experiences. He spent about an hour looking over the basic stuff before we all got locked down and we couldn't find anything that was OBVIOUS to him. IE an obviously loose wire or something disconnected. Plan was to come back over when he had time but you know... covid.

I do have a schematic but he is currently in possession of it. So it is not currently much help to me.

No strange smells, burning, or buzzing.

I do have a basic cheap HF multi meter. Not a pro with it. I can do basic soldering.

K to the nitty gritty.

Game start up fine. The bonus is triggered by the BIG roll overs, the drop targets, or the red roll overs. It doesn't ALWAYS lock the bonus. I have had time were I can hit B I G and a roll over and nothing. Sometimes one of the BIG roll overs will trigger it. The drop targets always seem to start the process, but before I shot the attached footage, with the play field up I triggered all of the switched including the drop targets and manually moved the bonus back to 0 several times before it would lock. The bonus will run all the way up to 15 and just keep on kicking. I will attach a video of the issue.

I can manually push in the bonus relay(D) and it will lock. I can manually pull it out to stop it although sometimes it resists(buzzes) and I have to try a few times. I can manually move the bonus motor both up and down with no resistance.

The only strange thing I found on the bonus motor is in the second picture. There is small jumper and I am not sure if it is just excess wire or if it could be going somewhere.

Here is video evidence.

Thanks again for any help you might be able to provide.

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Thanks for the advice. I will check this today and follow up!

I checked the switch on the add on bonus, I don't think it was adjusted properly but doesn't seem to be helping or hurting the runaway bonus. The switch is now closed when inactive and opens when the bonus counts. I believe it to be correct.

If I hold down "I" roller over switch when the game is behaving it does perform the run away.

I will will try and take a look at the "2A" switch. Can you confirm the stack I have circled is "2A"?

Thank you again.

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