Could it be the fan itself? Is it getting power, circuit tester required, at 98 degrees?

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did you check the fuse(s) ? ....
sorry, see you already did

 

Remove from the resistor 1 fan gear (O22) of the brown color cable and connect it with the mass (-12V). Fan If it is efficient should move full power. Repair instructions Vol 3 part 2 page 671. Gtv/Spider Service Manual - Google Drive

 

As Lech mention you need to debug the issue.
If you measure the voltage at the red wire on the fan, do you then measure 12V?
And as Lech says try to connected the brown wire to ground (Chassis)
If fan and wiring are functional the fan should spin

 

Nelly, does it come on at second threshold? ( I think it’s 103c ) I’d let it heat up to that temp monitor via the OBD port if it does come on then bypass the resistor ( brown wire ) , your fan should come at 98 but at full speed, if it doesn’t that narrows down the fault to the wire to the Resistor in the fan shroud.

you could also disconnect the engine temp sensor as the fan will come on as a default to protect the engine in the event there’s open circuit on the temp sensor ...

if it doesn’t then that would suggest a short somewhere between the ecu and the fan itself, as the ecu thinks it’s running .

I assume you tested the fan by connecting directly to a battery ?

good luck ...👍🏻

 

Many thanks for the replies. I disconnected the temp sensor and the fan didn’t come on although diagnostics said it was active. I’ll borrow a multimeter from work and check the voltages and try a battery on the fan etc. I’m guessing when the fan should be on I should get 12v on the plug for the fan. Is there any way to test the resistor?

 

Is there any way to test the resistor?

Yes, just short it/bypass it. When mine was acting out I essentially wired it for the fan to be always on.

 

Yes, 12v on the fan motor connector to see if it's the motor. It can be dismantled and has four sets of brushes, mine were not worn at 83k miles so yours may be sticking. Bearing is easy to replace as well.

 

Thanks again for all the replies... I shorted out the resistor and the fans kicked in immediately so at least I know what’s wrong. Do I get a used one for a couple of quid or splash out £50 on a new one?

 

used, there Isn’t much to go wrong with one, either it works or it doesn’t.

 

Just in case I need to buy a new one; does anyone know the part number for the one I need? The one I took out is definitely the origInal one and it’s brown in colour. According to Alfa Workshop, I need this one and it’s brown and 0.23 ohm;

But when I e-mailed Partsworld with my chassis no to check, they said I need this one which is black and 0.18 ohm.

Both republican reputable Alfa specialists so who is right? Thanks

 

If your car has automatic air-conditioning the p/n for the resistor is 51736821
If no air condiotioning the p/n is 60692416
At least according to ePER

 

Many thanks... mine has aircon (not that it works but I’ll get it sorted at some point if other bits of the car stop breaking).

 

Just had a little play about and the fan seems to be working fine after cleaning up the connections to the resistor. I’ll keep an eye on it but hopefully all sorted now.
Thanks again for all the advice.