Easy to fix, just use the original wires if you can find them, if not wire in a seperate fan circuit, like cossie owners do, just need a SPST, relay, holder a bit of wire and crimps.
Most relays a re to DIN standard so will be marked thus,
87 = FANS
30 = LIVE(to relay from battery or ignition), depending on whether you want it able to run with ignition off or not, BEST from battery through fuse.
85 = NEGATIVE
86 = SWITCH, ie fan switch, so that one side of the fan switch has a(PERMANENT) live, then the other side of the fan switch(output) goes to 86 to switch it.
tabetha