E-fan killing idle

sup guys i have a small problem, i have my fan hooked up to a relay,wich is on a switch 12v source. when the fan is hooked up the car dies, its fine at WOT but simply cant idle at a light. if the fan is disconnected car runs and drives perfect, clearly its drawing to much current. i have a fusible link on the POS on the circuit. would a smaller fuse bottle neck the system? and cause it to draw less current?? could i put in a resistor maybe? idk? any ideas?
 
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