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It seems you have other wiring issues going on... and a fuse will blow with the fans.


Here is a diagram of the proper wiring....





To replace a fusible link...

REPLACEMENT

1. Disconnect the negative battery terminal from the battery.
2. Locate the cause of the problem and repair before replacing the link.
3. Locate the burned out link.
4. Strip away the melted insulation and cut the burned link ends from the wire.
5. Strip the wire back 1 / 2 . (13mm) to allow soldering of the new link.
6. Using a new fusible link 4 gauges smaller than the protected circuit and approximately 10 in. (254mm) long, solder it into the circuit.

Whenever splicing a new wire, always bond the splice with rosin core solder, then cover with electrical tape. Using acid core solder may cause corrosion.

1. Tape and seal all splices with silicone to weatherproof repairs.
2. After taping the wire, tape the electrical harness leaving an exposed 5 in. (127mm) loop of wire.
3. Reconnect the battery.

go to: http://www.madelectrical.com/catalog/fusible-link.shtml

First, figure out what size wiring the orange wire is, then order the appropriate link kit.
Crimp and solder it in.

AND, get rid of that solid core wire, its bad, plus way too small!