I’m working on retrofitting a harbor freight gun safe and I’d just like to confirm my wiring, as this is my first “real electronics project. I’ve got jumper s3 to 1-2 but my meter is showing common as ground I’d like to have it as relay common hot but with the jumper in 2-3 it’s not showing as connected to the 12v line. Am I just over looking something, or is there possibly something wrong with my board? For the sake of posterity it’s an xAC v4 and this is the safe https://www.harborfreight.com/drop-down-gun-safe-57392.html
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Pics? 
Let’s see what you’re getting into.
What are you testing relative to what? Voltage is a differential between two references rather than an absolute thing.
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With what I have set up currently I’m checking for continuity between points and checking between the points marked in red. Also upon further inspection the reference pamphlet on the dangerous things website appears to be inaccurate as it shows pin 3 as ground but on my board it’s labeled ground (though I may be wrong on that
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Ok. So. Flip that thing over and use the leads. Plug it in and test from ground to 12v if you want to know. Continuity checks for a path which may be interrupted.
Can we assume that you are trying to run 12v through the NO lead to drive a solenoid in the gun case?
Edit: Beer might be involved in this part of my might.
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Yes, my current plan is to wire the NO lead to the striker motor positive and the negative to the board ground plane
Edit: I feel I should also mention I can’t test the board properly at this time because I’m waiting on a replacement antenna
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Ah ha! We have spoken before.
Oh, ye of little faith! Power it up. You can short the push-to-exit wire to ground to toggle the relay : )
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I completely forgot I could do that 
I’ll do some testing and come back if it doesn’t work
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I know I said I’d come back if it wasn’t working but if you’ll excuse the sketchy solder joints here’s a functional test setup (the green wire is just some scrap I had)
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Our favorite part is seeing these projects be realized. Thanks for sharing your progress
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Update: here’s the final wiring and finished product antenna location is final but temporarily mounted in case I need to move it after I get chipped (yes I know I need to dust)
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Are you sure???
Yeah, I think you will need to move it.
I would suggest you tape the fob onto your hand and see what works for you.
Are you a lefty or righty shooty?
Where are you thinking of getting your implant? P0?
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Can’t move it too far from where it is because of how the wiring worked out, but it’s easy enough to access, I mostly meant rotating to get a good spot to read, I shoot right handed (at least with pistols) and getting a NExT installed in P0 left hand
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I would consider looking at mounting the antenna here-ish
You should be able to desolder the antenna, and or run an extension.
Scan with your left, and pew-pew with your right.
Alternatively, if the pistol box can be mounted on the right, and implant P0-R, the scan and grab with your right…
Just some more things to consider before you commit…
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