Technical 2002 1.6 alternator fail

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Technical 2002 1.6 alternator fail

kivar20

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Hi guys,

This morning my stilo hit me with the alternator fail notice. I checked the battery and it is ok but it is not charging. All the electronics seem to have gone ofline. No abs asr aso.
How do i check to see if the alternator is really the problem? I heard that it might be a faulty wiring also..
Thanks!!
 
Follow the altrernator wire that's coming off the battery it will lead you to the alternator's plug and just attach your mutlimeter directly there
 
What should the multimeter read if the alternator is ok?
 
If you connect a voltmeter across the battery, it should read c.12.3V with the engine off.

Start the engine and put some fast idle on it (1500 - 2000 rpm) and the volts should read c14.6V. If yours is less, then the alternator isn't 100%.

Switch the lights on with the car idling and get someone to prod the gas pedal so the revs go to 1500-2000 for a second and then drop back down to idle again. If the lights get brighter with the extra revs then it's more likely the regulator/rectifier than the alternator itself. If the lights get brighter but not much... and the battery voltage is only slightly higher than 12.3V... then there may be a problem with the alternator itself (brushes usually).

If there's no difference to the battery voltage or the lights, whether the engine is at idle or at fast idle then the alternator windings are most likely knacked.

None of the options above is better than any other. You still have to remove the alternator to fix it and the rectifier/regulator will probably be more expensive than buying a whole new "exchange" alternator (cleaned up like new but "second-hand" frame and parts... fitted with new windings, brushes and regulator/rectifier).

Don't buy a new alternator without checking the price of a refurbished/exchange one... but don't fit something scabby taken off a breaker... it should look like new (unless you really enjoy dismantling alternators, of course.. :D )


Ralf S.
 
Thank you for all the good advises.
Is there a guide, like a step-by-step, about how to replace the alternator on a 02 stilo with a 1.6 engine
 
So, i finally managed to get around changing the alternator. Not too difficult but how do I unbolt this one? Any ideas
 

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Is there a guide, like a step-by-step, about how to replace the alternator on a 02 stilo with a 1.6 engine

Which is like impossible to get to. :) but I'll try to...

Below are diagrams and instructions from the Fiat dealer eLEARN workshop manual.
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Thank you. I got it done. Relatively an easy job IF you get the lower bolt off easily. It's a paiin in the &%# to reach.
 
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