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2002 pt cruiser blowing asd fuse at high rpm

 
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  #1 (permalink)  
Old 20 Jun 2016, 03:49 pm
Young Cruiser
 
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Location: Shannonville, Ontario, Canada
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Smile 2002 pt cruiser blowing asd fuse at high rpm

I have 2002 pt cruiser 2.4L non turbo. This issue started out as just a one time asd fuse blow but has gotten worse. I have so far checked every wire in circuit coming from fuse #13 for a dead short with a multimeter on continuity to see if anything is going to ground. Result nothing.

I narrowed it down to the fuse blowing when the RPM's are at 4000 or above. I then decided to take the generator out of the picture by disconnecting it and did not blow the fuse all the way up to redline several times.

Ran a voltage terst and it seems the voltage at high rpm is getting extremely high at 19.5 V

Here is what I am wondering? Where is the most likely place to look next the generator itself or the pcm which controls the voltage of the generator.

any advice greatly appreciated.
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Old 21 Jun 2016, 07:31 am
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

I would suspect a defective diode in the alternator (generator) that's allowing it to over charge. How many miles do you have on the PT? If you're close to a salvage yard, why not just get another alternator (generator) and try replacing it and see what happens? Of course, I'd open the junkyard one and install a new set of brushes before installing it in the PT, but that's just me.
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Old 21 Jun 2016, 08:46 am
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

Quote:
Originally Posted by chuzz View Post
I would suspect a defective diode in the alternator (generator) that's allowing it to over charge. How many miles do you have on the PT? If you're close to a salvage yard, why not just get another alternator (generator) and try replacing it and see what happens? Of course, I'd open the junkyard one and install a new set of brushes before installing it in the PT, but that's just me.
I will try that I was just afraid it was the pcm as it seems to control the field on these generators. I have 350000km (218000 Miles). I have a junkyard within a half mile from me.

Thank you
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Old 21 Jun 2016, 01:15 pm
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

I sure hope that works. If not, I don't have any other ideas that are different from yours.
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Old 21 Jun 2016, 02:59 pm
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

Will let you chuzz as soon as I get it changed out. Definitely will replace brushes while it is out as well. That is easier than putting it in and having to pull back out just to change brushes.
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Old 21 Jun 2016, 03:02 pm
Fk5 Fk5 is offline
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

Quote:
Originally Posted by gordon2418 View Post
Will let you chuzz as soon as I get it changed out. Definitely will replace brushes while it is out as well. That is easier than putting it in and having to pull back out just to change brushes.
Don't let him Chuzz! Never let him Chuzz!

Good luck with the alternator.
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Old 21 Jun 2016, 05:24 pm
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

LMAO! I think we're all smart enough here to figure out what word is missing in the first sentence of post # 5.
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Old 24 Jun 2016, 07:08 pm
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Talking Re: 2002 pt cruiser blowing asd fuse at high rpm

Thanks auto correct rotfl
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Old 24 Jun 2016, 09:18 pm
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

Still waiting to hear from you, Gordon.
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Old 24 Jun 2016, 10:18 pm
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Default Re: 2002 pt cruiser blowing asd fuse at high rpm

I would suggest checking your Battery Temperature Sensor or Inlet Air Temperature Sensor if equipped.
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