Relay Auxiliary Fan Stage 1 K21 Bmw 7 E38 728i M52 Europe In my 1998my 528i (m52 engine pure m52, so aux fan is old school with pre set speeds and the resistors on the side) my aux fan works when i jumper the temperature switch plug on the radiator near the expansion tank both ways. however, it doesn't come on when the ac is turned on (the compressor clutch doesn't activate either). Relay, auxiliary fan, stage 1 k21 bmw 728i e38 sedan europe m52 right hand drive, transmission: automatic, production date: december 1999.
Relay Auxiliary Fan Stage 1 K21 Bmw 5 E39 540i M62 Euro Relay r2 – additional cooling fan, stage 1 relay r3 – additional cooling fan, stage 2 relay r4 – blower relay relay r5 – horn relay relay r6 – cut off relay relay r7 – boot lid tailgate remote control relay r8 – heated windscreen relay, heated washer jets relay r9 – additional cooling fan, stage 3. 7: 7.5a conditioning: 8: 30a adjustable outside mirror central locking system electric window lifters: 9: 20a auxiliary fan: 10: 25a automatic stability control: 11: 15a air conditioning auxiliary fan heated rear window heated windshield heated heater: 12: 15a steering column adjustment: 13: 20a steering column adjustment control. 1994 1995: auxiliary fan stage 2 relay: ags transmission control unit, diagnostic connector: 35 36: 10: coil spring: 37 38: 5: 1994 1995: auxiliary fan stage 2 relay: 1995 2001: auxiliary fan stage 3 relay: 39: 25: switching centre: 15: driver's seat heating switch, passenger's seat heating switch: 40: 5: diagnostic connector: 41: 5. Aux fan resistor repair. blown fuse and the low speed resistor are the usual culprits for no low speed on the aux fan. at least this is true on the older versions. feed 12 volts to it directly and it should run if the fan is ok. my fan for my model year has no resistors on the fan.
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