Fan Speeds

[ALean Mofo 0]

Hi all

Noticed today that the temp gauge on my '97 Highline has climbed past the vertical where it normally always sits to about 110.

Also noticed the absents of any fan noise, checked under the bonnet and the fan is blowing at low speed. When it gets close to 110 the fan starts to shreik louder than i remember, so it doen't actually overheat.

I vaguely remember reading somewhere that the fan on a vr6 has 3 speeds. If this is the case how can i check if the 2nd speed is working?

Any suggestions would be welcome as i worried if this continues its be the end of the head gasket

[dellert 0]

Dont know the details, but theres a post about removing plugs and bridging the terminals. Try doing a search.

[FishWick 21]

Depending on model/sped 90, 100 and 120 are your 3 speed's trigger points.

Speed 3 - black temp sender in thermostat housing

Speed 1/2 - Temp sender in radiator.

Ignition needs to be on to test speeds 2 and 3. Speed 1 runs with the engine switched off.

There is a 3 pin plug on the radiator switch. Red/black - Speed 2. Red - Speed 1. Bridge these two pins across to the 3rd to test those speeds, and bridge the black temp sender to test speed 3.

If they all work when bridged, the senders are faulty, although speed 3 very rarely comes on.... you'll know when it does as it sounds like a hovercraft!

If still no joy when bridged (ignition on remember!) then the fan controle module is probably dead and that's the big £100 box in front of the coolant tank.

[ALean Mofo 0]

Cheers Kev!

Speed 3 is very loud, thought id knackered the fan