12v supply - inline fuse keeps blowing

[HendrixsWhiteStratReturns]

Evening all

Wired in a 12v socket a couple of years ago( to charge phone) and works fine but have recently rigged up two 12v fans in car and they plug straight into one of these ( see pic) which then goes into the 12v. The in-line fuse for the 12v socket is 25amp but blows almost immediately.

Know next to nothing about electrics but what would be the correct fuse to fit (and the max that would be prudent to fit) ?

 

Any advice appreciated ! Thanks 

 

 

 

 

 

[OldAndrewE]

Do you know what current the fans are supposed to draw (what power are they)?  You have potential for a max of 300W although you do not want to run to the max of the fuse for long.  It actually sounds to me as if there is a fault somewhere.

[Wrightpayne]

Have you tested your new extra equipment in the tintop (check where the 12v socket fuse is located first!)

[HendrixsWhiteStratReturns]

Thanks both will look up ! 

WP - yes and they were fine. Think it might be a duff socket so testing a spare on the morning.