Okay I’m a little confused on the operation of the xac and how I’m supposed to wire stuff.
Correct me if I’m wrong in these assumptions
- “NC” means normally closed
- “NO” means normally open
- “COM” is just the other side of that normally closed normally open circuit, i.e. if there was 12v connected to “COM” and “NO” then when you scan your tag you’ll read 12v on the NO wire?
Now here’s where I’m confused, what is the S3 jumper used for? I had switched it to the 12v high in troubleshooting the XAC connected to my car door lock and I got a bunch of smoke off the board. .Before doing so it worked on a test bench, with an adjustable dc power supply and a test light to see if I knew how to wire everything without frying it right away.everything worked as expected.
In the car I found a 12v constant and a ground, the XAC will run on it’s own door closed car locked for 20min(my car waits to turn a lot of things off acc power sometimes, terrible if you have an old battery;you have to replace it as soon as it gets old or it’ll die all the time. power mitigation in the works, just trying to get it to work right now)
The issue comes when I’m trying to wire the relay to my door lock. I’m not 100% how the switch works, as there’s only 2 wires but it works both ways(I assume to lock the door it just reverses polarity?), but for my purposes it’s fine because I can just jump the 2 wires and it’ll unlock the doors. So I wired the com and NO wires to it, scanned my implant annnd nothing. Tried flipping them, nothing. Jumped the pins with a wire, unlocks the doors.
At a loss I tried switching the S3 jumper from gnd low to 12v high and the jumper started getting red hot, and the board smoked. It seems just the NO side of things got fried, and everything else was untouched. NC still works, and the RFID functions perfect still. NO(or COM,it was the white wire, it was late at this point so I can’t remember) now seems shorted to ground and will unlock the doors as soon as I connect it to the wire that needs jumped on my door lock switch, whether theres supposed to be access or not.
So I suppose my question is to start what the heck does S3 do? And why didn’t wiring com and NO to both wires of the door lock(the ones that I can jump the pins to and it unlocks) unlock the door when I scanned my implant, the XAC is just closing that circuit between NO and COM right?