02 1.9D Fan swtich and fan not working - Azz
Please can you help me I have recently purchased a new cooling fan switch which needs fitting on my Citroën Berlingo van 2002 1.9 D. Can you please tell me the location of the fan switch? It does not have air con.

It overheats (the fan does not come on) and I want to check to see if the switch is working but I can't seem to locate it whereabouts. I have been to four Mechanics and they can?t seem to find it either I have also visited numerous web sites without any luck. This is costing me a lot of money and my time I would be deeply grateful if you be able to able to solve this mystery for me or even a diagram of it location would be even better.

Azz
02 1.9D Fan swtich and fan not working - redman
The fan switch on non air conditioning cars is fitted into the radiator on the left hand side with a blue wiring connector. If your car has air con, they are controlled by the air con control unit, that uses a temperature sensor mounted in the thermostat housing. It has a brown wiring connector.
02 1.9D Fan swtich and fan not working - cops

I have a 2005 (54 plate) Berlingo Multispace 1.9D - I have the same problem - The fan switch is NOT on the side of the radiator and I cant find a blue connector anywhere. All the Manuals say it is on L/H side of radiator but it is not. There is a sensor/switch in the top of the thermostat housing but this is green. Does anyone know where it is and what the circuit is? ie is the relay controlled by the ECU? or is it simply controlled by the allusive switch directly. Is it just a switch or a thermistor/Thermocouple (need to know so that I know how to test it)

02 1.9D Fan swtich and fan not working - mss1tw

Bump an old thread as it may help others....(Mine's 54 plate Berlingo 1.9D also)

Anyone know if the elusive cooling fan switch looks like this?

i583.photobucket.com/albums/ss275/chronyx/20140726...g

i583.photobucket.com/albums/ss275/chronyx/20140726...g

The radiator is a Nissens Denmark part fitted early this year as the original was bulging and I have been having over heating problems that are nigh on impossible to identify.

I was trying to ascertain if both fan speeds were working but appears to be a single speed fan in contrast to every piece of DW8 engine data I can find online.

These are the two relays tucked away on the rear left of the rad I have verified operation and continuity across them - I even used spade terminals and a short length of wire to jumper across the relay connector itself. The fan came on, but whatever that coil of wire does is lost on me. It looks like a heater but did not get hot. The size of the cable suggests it uses a decent amount of current.

i583.photobucket.com/albums/ss275/chronyx/20140726...g

Edited by mss1tw on 26/07/2014 at 19:20

02 1.9D Fan swtich and fan not working - elekie&a/c doctor
The coil in the metal case is the fan speed resistor for the slow speed cooling fan.The black sockets with wires are for relays.The cooling fan on these May be controlled by a switch in the radiator,or more likely by the coolant temp sensor which is part of the engine control system.If the slow speed resistor is faulty,this will not stop the fast speed from working.there may also be fuses below the engine bay fuse box for the fan.You need to carefully lift the fuse plate for inspection.
02 1.9D Fan swtich and fan not working - mss1tw
The coil in the metal case is the fan speed resistor for the slow speed cooling fan.The black sockets with wires are for relays.The cooling fan on these May be controlled by a switch in the radiator,or more likely by the coolant temp sensor which is part of the engine control system.If the slow speed resistor is faulty,this will not stop the fast speed from working.there may also be fuses below the engine bay fuse box for the fan.You need to carefully lift the fuse plate for inspection.

Thanks very much elekie (that reminds me - no AC on this vehicle) I'd already learned about the maxi fuses on the underside of the engine bay fuse box from another forum but forgot to mention them. Do you know if each speed has its own fuse? I did check them as best I could the other day but was in France at the time and only got back yesterday!

The fan comes on full at approx 105 and does drop the temperature quickly back to the point where it switches off.

I did find some radiator switches on eBay, but can't see any corresponding places where one could be fitted. The temp sensor seems to be on top of the thermostat with a green connector. I unplugged it and the gauge went to red, and returned to normal when I switched off and plugged it back in.

Thank you again

02 1.9D Fan swtich and fan not working - mss1tw

Also, does anyone know, or can tell me where to find out, what the two small diameter pipes going to the expansion tank do? I can't find a detailed description anywhere, even the Haynes only gives a general overview.

02 1.9D Fan swtich and fan not working - elekie&a/c doctor
If the fan is cutting in and out,then the temp sensor must be working.?However you don,t know if this is first or second speed.It is possible to do a simple test,when fan is running,disconnect the speed resistor,if the fan stops,then this is the slow speed and the resistor is ok.As for the coolant pipes,these will be return flow pipes back to the tank.With engine running,there should be a flow of coolant back to this .
02 1.9D Fan swtich and fan not working - mss1tw
If the fan is cutting in and out,then the temp sensor must be working.?However you don,t know if this is first or second speed.It is possible to do a simple test,when fan is running,disconnect the speed resistor,if the fan stops,then this is the slow speed and the resistor is ok.As for the coolant pipes,these will be return flow pipes back to the tank.With engine running,there should be a flow of coolant back to this .

High speed works - I manually linked out the relay by removing it from the holder and putting a jumper wire across the switched female terminals of the connector.
When i did this to the other relay, nothing happened.

Both relays were removed and bench tested for operation AND continuity across the load terminals! All connections given a good clean and squirt of contact cleaner.

In your opinion is this a failed resistor, or a faulty fan motor?

The only other odd thing is there is absoutely no where a radiator switch could be connected.

(This is what the part looks like i.ebayimg.com/00/s/MjQxWDI0MQ==/z/-WwAAOSwI~VTzKza...G)

There IS what looks like a blank plate on the radiator near the top hose, but the only blue connector in sight is the one that has the resistor mentioned above plugged into it. This is not on the radiator but on the surround/mounting plate.

No loose or disconnected cables were obvious even after removing radiator to access the relay comparment.

Looking in the Haynes they use the phrases "Where fitted" and "If applicable" liberally so I'm hoping there is not a radiator switch on this model

Again thank you for your help elekie

02 1.9D Fan swtich and fan not working - elekie&a/c doctor
The way I see this so far.the fan motor is fine ,the temp sensor is fine.this car does not have a temp switch in the rad.There is a fault with the low speed circuit,which means a fault with the speed resistor or related wiring.The resistor is easy to test with a digi meter or test bulb and wire across the battery.
02 1.9D Fan swtich and fan not working - mss1tw
The way I see this so far.the fan motor is fine ,the temp sensor is fine.this car does not have a temp switch in the rad.There is a fault with the low speed circuit,which means a fault with the speed resistor or related wiring.The resistor is easy to test with a digi meter or test bulb and wire across the battery.

Thanks elekie - I will get the tools out again and update this thread.

Can I just confirm I should have only one connector plug at the fan, and that high/low speeds are switched in elsewhere?

I will also add here for reference that cutting some slots in the thermostat surround before installing it again is helping keep the temperature nearer 90 celcius, although of course there is a longer warm up time. Not a solution I would want to use long-term, but it should give the engine an easier life for now while I do more investigation and order any parts.

Wish I'd done it before towing 2 motorbikes 1700 miles to and around the Pyrenees last week. Poor engine was at 100 most of the time, and we had to have the heater on full blast on long motorway climbs and on the steep Pyrenees hills. Fun.

02 1.9D Fan swtich and fan not working - mss1tw

Elekie doc, I owe you a pint and if you happen to live in/near Surrey will gladly oblige.

Here is a pic of the offending article - the resistor like you said.

i583.photobucket.com/albums/ss275/chronyx/20140727...g

i583.photobucket.com/albums/ss275/chronyx/20140727...g

I removed it and linked out the connector, then the relay, and the fan roared to life.

Hopefully this info will help anyone else with this problem.

And I saved £1400 on having a new head gasket (Symptoms very similar, only it didn't use coolant)

Thanks everyone

02 1.9D Fan swtich and fan not working - mss1tw

Just one more question - would this fault have caused a car to run hot on the motorway at speeds over 60mph and when climbing hills? I did not think fans operated at motorway speeds

The symptoms were identical to either failed HG or dodgy water pump impellor.

02 1.9D Fan swtich and fan not working - elekie&a/c doctor
Good to see a result.Once on the move over approx 30mph,the fans are not very effective,unless the coolant temp sensor requests operation .
02 1.9D Fan swtich and fan not working - mss1tw
Good to see a result.Once on the move over approx 30mph,the fans are not very effective,unless the coolant temp sensor requests operation .

Thanks - it could be a couple of things then as I originally had a problem with it getting hot over 60mph on the motorway or when climbing hills. Around town and bimbling along on the flat it will stay at just under 90 unless there's a traffic jam, and previously I've driven miles and miles with my foot to the floor and it's stayed at just under 90C.

I might book it in for a timing belt and water pump change as it may be the impellor. Annoying as I had it done only 2 years ago.

 

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