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Bad Diode


 
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kygreenyj
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Joined: 06 Jan 2004
Location: Clovistan, NM

PostPosted: Thu Dec 02, 2004 1:32 pm    Post subject: Bad Diode Reply with quote

My heep hasn;t been starting regularly so i took it to the batter place to check and make sure my Optima was not the problem. Turns out it was atleast part if not most of it. They also got another warning on all their diagnostic tests they did, it said "bad diode" in relation to the alternator. It is a crappy autozone alternator so im not really surprised but what dos this mean is my alt gonna go bad soon too?
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Thu Dec 02, 2004 8:51 pm    Post subject: Reply with quote

It sounds like it's already causing a problem. Alternators rely on diodes to rectify their AC output. If a diode has failed, the alternator might seem to be working but it is not delivering a full charge to the battery....thus the Jeep has not been starting regularly.

Steve
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CoreyXJ
Turkish
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Joined: 20 Jan 2004
Location: Louisville, KY

PostPosted: Thu Dec 02, 2004 9:26 pm    Post subject: Reply with quote

"Its all about the ball bearings....."

thephantums right on this one. The output of the alternator might be good but if the diode or resistor (whichever it is) isn't functioning properly then you aren't getting 100%. (watering the lawn through a straw?!?!)

You may also check the output voltage of the alternator...Sometimes it might be way to high and it could be burning out things in your system. Alternators are weird like that. Sometimes they just go tits up....dead. Other times they put out a whole lot of juice for a little while (like 24+ volts) and then they go dead, but ruin other things in the process.....

CoreyXJ
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"Do what you love to do...the money will eventually follow" - I. Larry
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kygreenyj
Member


Joined: 06 Jan 2004
Location: Clovistan, NM

PostPosted: Fri Dec 03, 2004 9:51 am    Post subject: Reply with quote

thanks i'll have to check out my options for replacements before i ruin another optima
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ecrab3
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Joined: 17 Jan 2004
Location: Westbank,Louisiana

PostPosted: Fri Dec 03, 2004 11:08 am    Post subject: Reply with quote

A few years back I had a old police car that had a slew of electrical problems. Well one day on my way to work, 90 miles from home, my alt went crazy and my voltage shot up beyond the gauges range and EVERY light bulb on the car, dash, dome, headlights, you name it, all blew at the same time! It was 6am and the sun was just starting to come up, im talking a bright blue flash! I made it to work and parked. 2mins later the battery exploded and dented my hood nicely and dripped acid on my front pass tire. Bubbled up the parking lots strips big time .

Needless to say, I got rid of the car right where it died for $350.

Moral of the story, dont sit on that bad alt/voltage regulator too long or you might end up with a story like mine rofl
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kygreenyj
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Joined: 06 Jan 2004
Location: Clovistan, NM

PostPosted: Fri Dec 03, 2004 12:46 pm    Post subject: Reply with quote

old police car wireing + doughnut frosting = electrical problems
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ThePhantum
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Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Sat Dec 04, 2004 6:55 am    Post subject: Reply with quote

kygreenyj wrote:
old police car wireing + doughnut frosting = electrical problems


rofl

you know a cop runs this board...right?
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CoreyXJ
Turkish
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Joined: 20 Jan 2004
Location: Louisville, KY

PostPosted: Sat Dec 04, 2004 7:05 am    Post subject: Reply with quote

We used to have a D.A.R.E. program that the police went around to schools to teach kids about drugs and alcohol. I always said it stood for Donuts Are Really Expensive.....

Corey Wright
University of Louisville Graduate
Justice Department
Bachelor of Arts in Police Administration

I was almost a cop too....but I decided I would rather go back to school Sad
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kygreenyj
Member


Joined: 06 Jan 2004
Location: Clovistan, NM

PostPosted: Sat Dec 04, 2004 8:12 am    Post subject: Reply with quote

CoreyXJ wrote:
We used to have a D.A.R.E. program that the police went around to schools to teach kids about drugs and alcohol. I always said it stood for Donuts Are Really Expensive.....

Corey Wright
University of Louisville Graduate
Justice Department
Bachelor of Arts in Police Administration

I was almost a cop too....but I decided I would rather go back to school Sad


where am i gonna be in 2 and a half years?? probably AF security forces Very Happy
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94 Jeep YJ 3.5 inch lift 33's Tera SYE and CV driveshaft, More Sport Cage, BL/MML, rust

06 Ford Escape Hybrid

03 KLR 650
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