On the fan shroud behind the radiator is a connector with wire leading to the aux fan. Disconnect the connector and use a volt meter to test the two thick wires. One will be power and one will be the ground. The Third skinny wire is the signal from the DME to turn the fan on.

If you don't have 12 volt at any one of the thick wires the 50 amp fuse behind the glove box is most likely blown.

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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD