pop the hood, and remove the two pin plug next to the fuel filter with key on or engine on, the front fans should run at high speed. If they are then the fans are good and the wiring is good to the fans.

If they dont go - follow

1 - raise hood to service position
2 - remove fuse panel and expose relay box by removing the screws
3 - there are two relays on the edge - one blue one green, blue is low speed and green is high both have fuses in them remove relays and check the fuses - if blown replace them
4 check fan operation by removing connector - if they dont work - then follow

1 the main fan connector is beside the radiator in a metal cradle on the chassis leg, remove the plugs and see which wire is brown, test the brown wire to body ground (it is grounded on the ABS pump bracket) - test the other wire to continuity at the resistor (test the side closest), if you dont get continuity - your wiring from the resistor is burnt which is normal for this car. remove headlamp and repair the wiring, you might need to change the resistor too as the lugs and nuts weld themselves to the screw posts renderring it useless.

If you see continuity to the resistor wiring, then you need to feed the fans power from the connector to see if they are good to run.

To check low speed A/C function the drier bottle ahead of the resistor has a switch on it with 2 brown wires with spade connectors, remove and join the body side together the low speed fans should work if the resistor and wiring is good. You might also want to test that one wire of what you are shorting actually has body ground, it is also grounded to the ABS pump bracket.

All this aside - the A/C function is also dependant on the main engine fan - it should clutch up from the transferred heat of the condenser. The engine fan can pull insane amounts of air. the front fans are only to provide some flow when the car is idling.

the blower motor difference is the little pig tails on the motor wiring and the smaller dia but wider fan wheels due to the airbox having filters.. You can solder your old wire pigtails to the old style motor and cut off the spade connectors on the motor then transfer the fan wheels over. - you would need a high wattage solder iron as the lug you are soldering to is very thick.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)