Alternator Diode - Audio & Electronics Forum

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Alternator Diode
Monday, August 22, 2011 6:28 PM
I have an 03 Sunfire that is having some power issues. I had the battery and alternator tested thinking it was the battery. The diagnostic came back saying there was a failure in the diodes from the alternator. Is this a replaceable part or does it mean i have to replace the whole alternator? Anyone have a good reference for doing either job?

Re: Alternator Diode
Tuesday, August 23, 2011 8:40 PM
you can replace the diode but it'll probably be more expensive/time consuming than just getting another alt, considering that they're relatively cheap
Re: Alternator Diode
Wednesday, August 24, 2011 8:47 AM
It's a rectifier, and they're not all that expensive.



Re: Alternator Diode
Wednesday, August 24, 2011 9:04 PM
for the price of the trio/rectifier, you can get a HO rebuild kit from spring hill. i rebuilt mine in three hours. awesome kit. well worth the price.



Edited 1 time(s). Last edited Wednesday, August 24, 2011 9:39 PM


car audio noob since 1984.
Re: Alternator Diode
Thursday, August 25, 2011 5:25 AM
Thanks for all the info. Looks like I'll rebuild the alternator.... starting the car and losing all stereo presets and the clock is getting old.
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