I have a problem with my DM where none of the flashers are not working. I've been doing some research and am hoping that it's a bad interlock switch. I believe the way to test this theory is to look for 16 VAC at pins 3 and 4 on J102 of the driver board. I'm not really sure how to go about testing this with my DMM.

Do I put the positive on my DMM into pin 3 on the cable and the neg to pin 4 with the machine on?

For reference LED5 is not lit. I think this either points to the board not getting power, BR4 or C11 being bad or bad trace somewhere. I have tested the fuse out of the machine and it registered good.

Sorry for the noob question. This is all new to me.

Lol I'll be sure to do that

As far as checking the 20 volts T 7. Do I put my positive lead on the t7 post and the negative on the post just below it?

Edit: Also do I do this with the machine on and the coin door closed?

I'm going to try this.

I tested on TP7 and TP5 and looks like I only have .6 v. I know that's a problem. Where should I look next aside from the fuse?

So I think I'll pull the board in the next couple days and check out BR4 as well as continuity between the - on BR4 and the - on C11.

Thanks cody. I'll check this today

Edit: Just to clarify I'm inserting the leads into the connector right?

Quick update I tested on Pin 2 & 3 of the j102 connector and got 17.25 volts AC. I also retested TP 7 against the ground strap and still only got .5 volts DC. I believe then my problem is probably with BR4 or C11. Does this sound right?