Airbag Code 12 - fuse keeps blowing
 

Hi,

The airbag light on my 1995 Ranger has recently started flashing a code 12, which I have traced to a blown fuse in the underhood fuse box (mini fuse #4). When I replaced the fuse, it blew again within 30 seconds or so (ignition off). The two air bag system fuses in the interior fuse box (#2 and #15) are ok.

Can anyone help me diagnose this issue further?

Thanks for your help.