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Radiator fan resistor #1630051
25/02/2019 12:07
25/02/2019 12:07
Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
Scuderia Offline OP
My life on the forum
Scuderia  Offline OP
My life on the forum

Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
The slow speed fan is not functioning on my 16v turbo, it hasn't worked for years. The terminals to the resistor are burnt, its had a poor connection there in the past but I don't believe that's the problem. I cant start the engine to test the switch but I suspect it's the fan resistor anyway.

The unit has a large coil, it has no resistance, what is the purpose of the coil? It also has what I assume is a small resistor underneath. Should this have resistance? I have continuity on all parts of the resistor unit except that little resistor itself is open loop. I assume this is a definitive test that it has failed, can anyone confirm?

This part seems impossible to get but 20v turbo resistor is available. It appears to be the same except for the terminals which should be easy to rewire. will it fit the radiator shroud?

Thanks


Last edited by Scuderia; 25/02/2019 12:15.
Re: Radiator fan resistor [Re: Scuderia] #1630062
25/02/2019 19:47
25/02/2019 19:47
Joined: Dec 2005
Posts: 32,152
Hemel in the Hempstead
barnacle Offline
Club Member 18 - Minister without Portfolio
barnacle  Offline
Club Member 18 - Minister without Portfolio
Forum Demigod

Joined: Dec 2005
Posts: 32,152
Hemel in the Hempstead
The little black thing is a thermal fuse. Too hot and pop it goes...

The coil doesn't have a lot of resistance - on the Bravo I replaced the radiator fan resistor with an 0.47ohm 50W power resistor. Most multimeters can't measure that low if you're not greatly familiar with them.

That resistor you found should do the trick, just make sure it's mounted in the fan airflow so it's properly cooled.



Don't get no respect! Coupe Fiat 1994-2000 - an owner's guide <-- clicky!
Re: Radiator fan resistor [Re: Scuderia] #1630075
26/02/2019 06:51
26/02/2019 06:51
Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
Scuderia Offline OP
My life on the forum
Scuderia  Offline OP
My life on the forum

Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
Thanks barnacle

The coil has around 0.5 to 1.0 ohms so much the same. Are you saying if I replace the fuse it will work? I'm OK with a soldering iron, do you know the fuse details, can I buy one?

Re: Radiator fan resistor [Re: Scuderia] #1630091
26/02/2019 11:18
26/02/2019 11:18
Joined: Dec 2005
Posts: 32,152
Hemel in the Hempstead
barnacle Offline
Club Member 18 - Minister without Portfolio
barnacle  Offline
Club Member 18 - Minister without Portfolio
Forum Demigod

Joined: Dec 2005
Posts: 32,152
Hemel in the Hempstead
I don't know the details; they're specific for current and temperature so while they're available you can't just stick one in; you need the right flavour. Unless it's got a manufacturer and part number, it'd be suck it and see.

You have to wonder why they bothered with a thermal cutout on a part which is supposed to keep things cool. If it fails, as yours has, then you lose the half speed fan but you also *any* fan until it gets hot enough for full speed. Odd design choice.



Don't get no respect! Coupe Fiat 1994-2000 - an owner's guide <-- clicky!
Re: Radiator fan resistor [Re: Scuderia] #1631524
07/04/2019 09:49
07/04/2019 09:49
Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
Scuderia Offline OP
My life on the forum
Scuderia  Offline OP
My life on the forum

Joined: Nov 2006
Posts: 1,563
Melbourne, Australia
Well, the 16V turbo part seems very hard to find. I took a punt on a 20v turbo item and it fits and works fine with a minor rewire.


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