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Old 17-02-2014   #31
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Re: Burnt wiring in heater

Quote Originally Posted by molton View Post
@KBonnie, I have the same issue with my 2006, 1.4 with climate control. The fan won't run at high speed for more than a second or so, and then turns itself back down. It keeps trying to get to full speed, but then goes back to slow.. Also I am not on full auto.
After a further look i have found that the gray plug of the two plugs going into the motor has a melted connector. Not sure if i can replace just that part will try and get a picture later but id start by looking there.
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Old 17-02-2014   #32
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Re: Burnt wiring in heater

I just checked all 4 connectors that i can get to, and none of them show sign of overheating. I don't know if this is good or bad news for me
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Old 27-12-2014   #33
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Re: Burnt wiring in heater

Hi sorry to bring this up.... im new to fiat puntos, i bought an 06 for my daughter and have the same fan problem. Ive checked all fuses, ihave power at the multiplug and have removed resister. Wires seem ok not burnt at all so am i right in thinking new resister will be the culprit ? Many thanks col.
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Old 27-12-2014   #34
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Re: Burnt wiring in heater

Quote Originally Posted by curlycol1 View Post
Hi sorry to bring this up.... im new to fiat puntos, i bought an 06 for my daughter and have the same fan problem. Ive checked all fuses, ihave power at the multiplug and have removed resister. Wires seem ok not burnt at all so am i right in thinking new resister will be the culprit ? Many thanks col.
Hi,

worth taking the fan out , and checking it actually runs with 12Volt supply to it's connector terminals

leaves/ parking tickets, etc can all build up and stop it..,

generally resistor problem fail to S L O W it, just runs at full chat permanently,

if it's NOT blowing , take it out,
3 screws..!!,

look in the Guides for info , GP , and similar Punto 2/b

Charlie - Oxford
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Old 27-12-2014   #35
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Re: Burnt wiring in heater

Thanks charlie, it doesn't work at all on any speed, my daughter said it was making a noise like a piece of card in it. I will chexk in the morning. Do you know what pins out of the 5 is live and earth. Thanks
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Old 08-02-2015   #36
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Re: Burnt wiring in heater

Quote Originally Posted by curlycol1 View Post
Thanks charlie, it doesn't work at all on any speed, my daughter said it was making a noise like a piece of card in it. I will chexk in the morning. Do you know what pins out of the 5 is live and earth. Thanks
no problem,
did you figure out the issue,

Charlie
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Old 08-02-2015   #37
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Thumbs up Re: Burnt wiring in heater

Yes i did thanks, brushes worn out in motor, i bought a new one from feebay.... fitted and cured the problem... very easy diy task to be honest. Cheers
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Old 21-03-2015   #38
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Re: Burnt wiring in heater

I came across a quick fix to the overheated resistor pack plug on the Corsa forum where someone joined the orange & brown wires together in the loom bypassing the connector. This will make the fan run on full speed only via the fan control.
A bit more investigation shows that the orange & brown connectors (4&5) are actually joined on the resistor pack and even bypass the thermal fuse on the pack. I've attached the diagram from eLearn. The wiring colours and the speed switch wiring through the resistors is not correct at least so far as my 07 GP is concerned but the connectors are certainly joined together inside as per the diagram.
I've joined the brown & orange wires (4&5) in the loom just outside the connector, but left them also connected into the connector. Hopefully this will allow 2x the wires & connectors taking the load out of the pack to the motor for speeds 1-3 and will bypass the connector & pack altogether for top speed which is what puts the most load on the connector.
So far after a week, all is fine. But I take no responsibility if you try this, there maybe variations in the wiring colours or the actual wiring itself from time to time.
Attached Files
File Type: pdf heater wiring.pdf (149.6 KB, 361 views)
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Old 13-12-2016   #39
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Thread resurrection! My heater does not work at all on any speed despite working perfectly 12 hours ago. I removed the motor thanks to the helpful guide, but there was no debris. I cannot get the resistor free (not for lack of trying). I did notice however my orange and brown look a little burnt? I'm no expert so looking for a second opinion before I decide what bit to buy (the Corsa D adapter kit or a new resistor).
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Old 13-12-2016   #40
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Re: Burnt wiring in heater

From your description, I doubt if it's the motor brushes, but I may be wrong.

You could try joining the brown & orange wires on the wiring loom (leave some free wire above the connector) and then set the control to full speed. If this works, you can re-join the brown & orange back to the connector but leave them connected together as I did. I read somewhere about there being a screw holding the resistor pack in place, maybe that's why it won't move sideways?
An alternative is to buy a new wiring connector and a new resistor pack, then cut & join all the wires to the new connector.

As I noted in my first post, I can't take any responsibility for anything you do to your own wiring, but this did work for me and was fine 18 months later.
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Last edited by cancunia; 13-12-2016 at 11:53.
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Old 13-12-2016   #41
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Re: Burnt wiring in heater

Thanks for the speedy reply! I'm keen to fix it 'properly' - just wanted a second opinion on the state of my orange and brown wires (are they scorched?) before I purchase either a new resiator or the adapter kit you posted. Since my previous post I managed to get the resistor free using a thin flat blade screwdriver on the smaller of the 2 clips holding it in place, and note the #5 pin is a little cruddy. WD40 made no difference, I think i'll go to my local FIAT and see if I can try a new resistor before I buy :-)
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Last edited by Turtle; 13-12-2016 at 12:12.
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Old 13-12-2016   #42
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Re: Burnt wiring in heater

The problem is that the single connector taking all the power to the motor is not really up to the task, replacing the connector will solve the problem but maybe only for a while. There's a design fault & that's why there are connectors on ebay. I think later models have a revised wiring loom to fix this problem. By joining the 2 wires, you double the connectors taking the load to the motor and bypass the connectors altogether when the motor is on full power.
In the end, you must decide what's best for you. It's your money & your car!
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Old 13-12-2016   #43
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Re: Burnt wiring in heater

Quote Originally Posted by cancunia View Post
The problem is that the single connector taking all the power to the motor is not really up to the task, replacing the connector will solve the problem but maybe only for a while. There's a design fault & that's why there are connectors on ebay. I think later models have a revised wiring loom to fix this problem. By joining the 2 wires, you double the connectors taking the load to the motor and bypass the connectors altogether when the motor is on full power.
In the end, you must decide what's best for you. It's your money & your car!
So the resistor is probably not at fault?
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Old 13-12-2016   #44
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Re: Burnt wiring in heater

Quote Originally Posted by Turtle View Post
So the resistor is probably not at fault?
There is no resistor or thermal fuse used for full speed on the fan afaik (see the pdf file that I attached in an earlier post) so if your fan does not work at all, chances are that the resistors in the pack are not your main problem. To be sure, you'll need to check with a multimeter.
The common problem is that the connector taking the power to the motor overheats and melts the connector and / or becomes corroded & simply stops taking the power through to the motor.
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Last edited by cancunia; 13-12-2016 at 12:35.
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Old 13-12-2016   #45
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Re: Burnt wiring in heater

Update with a happy ending! New resistor did the trick.
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