L322 2006 3.6 tdv8 p0480 fan 1 control circuit

ow we doin'

As title really, cleared and comes back so needs sorting

Temp gauge rock solid in the middle, no overheating

Viscous fan works and kicks up a gear whilst idling, but electric fan at front of rad pack doesn't kick in at all

I am electrically inept

I've got 12volts from the harness plug, so I'm assuming I haven't got a break in the wires. Chased the harness back and it looks OK as well.

Can anyone advise how to test the socket on the fan, guessing I'm looking for resistance? Is it worth hooking a 12v battery direct to fan to test motor?

I thank ye!





Edit
I better check fuses hadn't I

I don't know about your car, but on most cars, the electric fan only operates with the air conditioning.
You need to use a test lamp for the voltage, a DVM can often give a reading but the voltage will disappear when under load.
Certainly check the fuses.

Datatek said:

I don't know about your car, but on most cars, the electric fan only operates with the air conditioning.
You need to use a test lamp for the voltage, a DVM can often give a reading but the voltage will disappear when under load.
Certainly check the fuses.

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Cheers Mucka

Just testing with a/c on now, still not coming on

Checked manual for fuse location, no fuses for cooling fan, ill attach pics of fuse lists

No test light unfortunately but do have multimeter

The Disco 2 also uses the aircon fan to suppliment the viscous when it's dead hot

1988smithy said:

Cheers Mucka

Just testing with a/c on now, still not coming on

Checked manual for fuse location, no fuses for cooling fan, ill attach pics of fuse lists

No test light unfortunately but do have multimeter
View attachment 293632View attachment 293633View attachment 293634

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Also on the D2 I think the fan only comes on when the temp is around 26 degrees, although I could be wrong.

backinblack said:

The Disco 2 also uses the aircon fan to suppliment the viscous when it's dead hot

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I thought it was big for just an aircon fan

Could the fault code be to do with the viscous fan even thought its working?

1988smithy said:

I thought it was big for just an aircon fan

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The P38 has 2 electric fans, so it's not that big. Does the viscous have electronic control on your car?

Datatek said:

The P38 has 2 electric fans, so it's not that big. Does the viscous have electronic control on your car?

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I believe so, just searching for location of relay and electrical connections online

Is your aircon working bloke?

Mark Piercy said:

Is your aircon working bloke?

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Tis arr, just not hot but thats another story

Its colder than an Eskimos ring piece tbf

You could try and power the fan once disconnected. Also fit a test light to the plug on the loom and have the aircon on and see if the problem is either the controller or the fan. Do you have any diag that shows the aircon circuit I.e aircon temps ?

i have the same model ,replaced condenser as air con was not working ,car ran fine with out putting air con on ,as soon as put air con on car would overheat ,is the fan the problem ?? live in Spain and its very hot need air con thanks any help

Mark Piercy said:

You could try and power the fan once disconnected. Also fit a test light to the plug on the loom and have the aircon on and see if the problem is either the controller or the fan. Do you have any diag that shows the aircon circuit I.e aircon temps ?

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I'll grab a test light today and power fan off a battery and update

No diagrams mate

Found these.
from 2002on and 2005 manuals
May help or hinder

J

marjon said:

Found these.
from 2002on and 2005 manuals
May help or hinder

J

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All looks v helpful, ill let you know

Local motor factors got no test lights in stock, I can try somewhere else later or tomorrow

Hooked a couple of wires up to a battery, figured out top pin on the plug was the perm live.

Applied electricity and nothing doing. Jammed the live into the command wire pin, nothing doing

Safe to say fan motor is fubar? I appreciate i need to check command wire on harness once I get a test light and investigate relay etc

if the fan wont run thats the first port of call shirley.
Maybe why you have the fault, the brain has said run fan, the fan don't run, the brain says opps somethings wrong, alert my owner cos he will fix it .

J

1988smithy said:

Local motor factors got no test lights in stock, I can try somewhere else later or tomorrow

Hooked a couple of wires up to a battery, figured out top pin on the plug was the perm live.

Applied electricity and nothing doing. Jammed the live into the command wire pin, nothing doing

Safe to say fan motor is fubar? I appreciate i need to check command wire on harness once I get a test light and investigate relay etc

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Are you saying there are 3 wires, positive, negative and a command line? If so, you will need +12 on the positive, ground on the negative and either ground or +12 on the command wire. Be careful with the command line, if it requires ground, applying 12 volts may cause damage.

Datatek said:

Are you saying there are 3 wires, positive, negative and a command line? If so, you will need +12 on the positive, ground on the negative and either ground or +12 on the command wire. Be careful with the command line, if it requires ground, applying 12 volts may cause damage.

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Yeah 3 wires, one of them is lickle so guessing command wire

I think I'll try a test lamp tomorrow on the harness plug, so test lamp probe in command wire pin but do I earth to negative or positive?

Teat lamp on positive pin and earth to negative will tell me if I've got constant 12v feed wont it, then as above to test command wire with ignition and a/c on

Then as you said to test the socket on the fan?