DC brushless Fan issue?

[dknguyen]

2amp wall adapter wont run the fan at all WTF?

Does it say AC output on it?

 

[Xn35]

in :100-240VAC 50/60hz .55A
out: 12vcd 2A

 

[dknguyen]

in :100-240VAC 50/60hz .55A
out: 12vcd 2A

Now that's really weird... o.0. Is the barrel connector polarity the same as your other one? Sometimes the outside is negative and the inside is positive and other times it's the opposite. Measure the voltage with your meter.

 

[Xn35]

I tried even just sticking the wires directly to the adapter with both polarities

 

[Xn35]

and it is put out 12vdc on the multimeter

 

[dknguyen]

I tried even just sticking the wires directly to the adapter with both polarities

Try it with the batteries again to see if the fan still works. Reverse polarity can damage the motor (well not the motor so much as the electronics in the fan). Try the flick startup too.

 

[Xn35]

The fan motor still works

 

[dknguyen]

The fan motor still works

Bleh, I dunno man. That's really strange. Are you able to get at it such that you can you monitor the voltage or current when you plug the fan in?

 

[MaxHeadRoom78]

The automotive battery test will confirm whether the fan is working OK.
Max.

 

[Xn35]

Just hooked it up to a 12v car plug with 5a fuse and worked fine

 

[Xn35]

I cant get to the connections on the motor

 

[dknguyen]

I cant get to the connections on the motor

You're going to have to steal some wire from somewhere so you can get at the connections between the fan and power adapter while they are plugged together.

 

[MaxHeadRoom78]

Just hooked it up to a 12v car plug with 5a fuse and worked fine

I rest my case.
Max.

 

[Xn35]

I can get at the connections and it is saying 12V but i would like to get at the connections at the back of the motor but cant, its built into the metal casing.

 

[dknguyen]

I can get at the connections and it is saying 12V but i would like to get at the connections at the back of the motor but cant, its built into the metal casing.

That's fine. I just need the connections on the connector between the fan and wall adapter, not the motor on the actual fan. You're saying that it says 12VDC at the moment you plug the fan in without any other momentary value?

What about the current (meter is not connected in the same way to measure voltage).

 

[Xn35]

Why wont it work on the wall wart Max?
If I run the Multi meter inline I get like 300mV

 

[dknguyen]

Why wont it work on the wall wart Max?
If I run the Multi meter inline I get like 300mV

By line, do you mean like this?
https://www.electronicshub.org/wp-content/uploads/2015/09/Current-Measurement-using-Multimeter.jpg

If so, that's how you wire it to measure current. What does the multi-meter say for current at the moment you plug it in and a few seconds after being plugged in?

 

[Xn35]

Starts at 250mV then just keeps slowly climbing.

 

[Xn35]

Yeah thats how it was hooked up

 

[dknguyen]

The current, what is the current? Change the knob on your meter for current (and you might also have to change the plugs the probe are plugged into on the meter).