aux fan not working on 1990 BMW 525i

aux fan not woking i checked fan with power probe it works that way under the hood the relays are not labled. the haynes repair book do not help much????????

1 answer 1 comment
So, the AUX fan does not come on when the A/C is turned on? Does the A/C work properly? Does the engine run too hot? If the A/C works properly and the Aux or condenser fan does not come on, it could be a relay. Does the fan have power and ground when the A/C is on? If not, which is missing is it power or ground or both?
I have a 96 740 I replaced the blower motor and the ac still doesnt work my ? is would the aux fan effect the blowing of ac? a little comes out when u drive other than that nothing at all.. plz help..