Okay do you have one of these?
These little gems are no good imo so lets fix her up.
Supplies:
China ohm meter
Screw drivers
Hot glue gun and ummm...glue!
Solder gun and umm...solder!!
The process:
Take the back cover off of the tester and take the batteries out save that stuff you will use it again
Lift up black shrink tubing covering the board amd the 510 connection now you do not need to take it all the way off you just need to fild it back and stuff it into the side where the board is at
Locate the black negative wire going to the nut on the 510 connection you see it soldered to the nut?? Probably not cause the connection is junk!! So procced to solder that bad boy on there even better!!!
Now get your hot glue gun and fill the entire cavity with hot glue for a solid connection!!
And thats a cheap fix for the ohm tester from china these things are simple electronic devices and the board most likely it not bad unless you tried to jump your car with it lol
I hope this helps

These little gems are no good imo so lets fix her up.
Supplies:
China ohm meter
Screw drivers
Hot glue gun and ummm...glue!
Solder gun and umm...solder!!
The process:
Take the back cover off of the tester and take the batteries out save that stuff you will use it again

Lift up black shrink tubing covering the board amd the 510 connection now you do not need to take it all the way off you just need to fild it back and stuff it into the side where the board is at

Locate the black negative wire going to the nut on the 510 connection you see it soldered to the nut?? Probably not cause the connection is junk!! So procced to solder that bad boy on there even better!!!
Now get your hot glue gun and fill the entire cavity with hot glue for a solid connection!!
And thats a cheap fix for the ohm tester from china these things are simple electronic devices and the board most likely it not bad unless you tried to jump your car with it lol
I hope this helps