Halfords cool box

[camerabloke]

Surely if its connected the wrong way round it would be a hot box ; )

 

[thrifty]

Surely if its connected the wrong way round it would be a hot box ; )

Boom tish

 

[Lucien Nunes]

It probably won't blow the fuse. If it is a thermoelectric cooler, if you get the polarity wrong the actual cooling element will work in reverse and heat the interior. However if the fan has an electronically commutated motor, you will kill it instantly. If it has a brush motor, it will simply run backwards.

There is no convention for whether a stripe is positive or negative, even products from the same manufacturer can be different. I think you will have to open it up and look at the polarity markings on the fan motor or the direction of the power LED (if it has one) and trace it through to the cable.

 

[telectrix]

i'd cut the plug open as said before.

 

[sean_ork]

i'd cut the plug open as said before.

he doesn't have the plug ........

 

[Lucien Nunes]

Possibility: connect to low voltage around 3-4V, briefly, while carefully watching power LED. Will glow very dimly if polarity correct, but voltage probably won't be high enough to cause damage if reversed. If you are lucky it has reverse polarity protection on the fan anyway. OTOH what's the most it can cost you if it goes pop!

 

[ruston]

Possibility: connect to low voltage around 3-4V, briefly, while carefully watching power LED. Will glow very dimly if polarity correct, but voltage probably won't be high enough to cause damage if reversed. If you are lucky it has reverse polarity protection on the fan anyway. OTOH what's the most it can cost you if it goes pop!

Well it is no good the way it is. It probably is not polarity critical because it may be designed for camping applications where the polarity of the output cannot be guaranteed.

 

[UKMeterman]

What is wrong with a little dead testing with an ohm meter!
Take old plug and find out which contact had contiunity to the side with the ridge on the wire and which contact had continunity to the other. Once this has been done examine new plug and do the same tests, then based on your results wire up new plug!

 

[sean_ork]

he doesn't have the plug

 

[thrifty]

I Dinny have the plug! I have managed to open the case and trace the positive and negative back.....and rebuilt it, and it works!

Thanks for your input folks

 

[Earthstore]

Well we we all drink to that, and a cool one too...