another cooling fan problem

[peugeot309]

I have got a fan problem - different than the one in the thread below.

This morning I noticed a wire hanging under the driver's headlamp. When I tried to start the car the battery was drained out. I got a bust and drove about 45km. When I stopped the engine I realized that the cooling fans wouldn't stop (they seem to be on low speed). I had a look at the hanging wire, it has a plug that shows some rust in it. I suspect that wire is behind problem but I have no idea where to plug it back.

Any suggestions will be much appreciated.

 

[kev25v6]

See how far the cable will reach, it must go somewhere it can stretch to.

 

[Dick_Larimore]

Which fuse did you pull?

In response to you PM, I can find no wiring to the fans, the coolant fan control module, or the coolant fan thermal switch that would contain both a brown and a black striped wire. Brown wires in a VW are always ground wires. So I don't think the "extra" connector has nothing to do with the coolant fans running continuously.

A coolant fan control switch screwed into the radiator on the lower driver side (North American vehicle) turns both fans on low speed (red/white lead to power fans). The low speed is powered thru a 30 amp green fuse, S180, on top of the battery (far left of the three green fuses). The low speed control works on radiator temp and is independent of the A/C. If you removed this fuse to stop the fans from running, then it is very likely that the coolant fan control switch screwed into the radiator is defective (switch always on).

Please confirm that S180 causes the fans to stop running while fuse S164 (40 amp metal strap fuse on top of the battery) is still hooked up. You can confirm if the coolant fan control switch is bad by simply putting an ohmmeter across the output terminals of the switch. If the radiator is cold and the switch is on (resistance less than 10 ohms), then you found the problem.

 

[peugeot309]

I turned OFF the fans just by removing the 30 amp fuse while all other fuses are still hooked up.
I will check the coolant control switch.
Thanks.

 

[peugeot309]

Today the weather got reasonable in Toronto so I went to the dealer I bought a new radiator fan switch, unplugged the old one and plugged the new one (holding it in the air). No difference, as soon as I reconnect the fuse I can hear a click (I suppose the relay) and the fans would start …

I don’t have an ohmmeter and the access to the old switch is not that easy so I can’t really say if the old switch is defective or not.