Hey,
This is a 12V DC motor
https://www.aliexpress.com/item/32942077188.html
I checked with a multimeter, it's getting its 12V, limiting current to 1 ampere with power supply
Thing is, it's been working fine last time I tested it a few days ago. The only thing I've done since is disassemble it to looked at the gears but it still should be turning as I left it disassembled... any idea?
Since you have your DVM right there, what does the resistance show when you remove the power and check the motor terminals?
Does the meter on your power supply show the current drawn? If so, what is shown when the motor is connected?
From the linked ad:
Current Rating: 0.8A
We don't know what that means. Is it no load current? The stall current can be 10 times or more of that value. Stall current is drawn every time that the motor starts and the motor power supply must be able to supply that much current.
@groundFungus as for the current when I put 12V it appears to be 0 (usually the current automatically changes when there is something running).. multimeter also shows 0 ampere
Hmm, strangely it appears to be short-circuited between the two legs... does it mean I fried it somehow?
With a reading of 5.66Megohms it looks like the motor winding is open, but turn the motor a bit and re-measure. Do that a few times. If you still get that high reading the motor is dead. The winding should read less than about 10 Ohms, but more than 0.
If the motor were short circuited, the meter would read near 0 Ohms. 5.66Megohm is an open circuit. That could be the result of applying too high of a voltage or applying the rated voltage to a locked motor. Most motors are not built to survive being stalled (locked) for long.
Woah... I just turned around a couple of times and figured it's not gonna work then after like 10+ turns it started working again! (probably should not have done it with the 12V connected heh...)
I didn't realize it was so fragile
I'll read about motor winding getting open more... I'm convinced I'm gonna go back to working with it and it's gonna happen again
Yea ok, I see what happened... whenever I try to put the gears back it stops running, I guess I applied too much pressure and the disassembly/assembly process f****d it up and now it goes back and forth between working and not working... ah darn it
Anyway big thanks for the help and for giving me insight into this.... 
appreciate it!
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