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Old 12-05-2003, 05:55 PM
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Join Date: Jun 2001
Posts: 90
Some help please,300e ABS trouble caused by alternator

I`ve had the abs play up because of a faulty exciter diode in the alternator, and had the diode pack replaced and it cures the problem, this has happened twice, one year between(coincidence i thought), and both times the replacement of the diode pack has cured the problem. But now it`s happened again six months later, are these diode packs running at their max almost for me to have this happen for the third time, it`s the 80amp heavy duty alt, and the same diode pack as original.
cheers george.

Last edited by georgehifi; 12-09-2003 at 01:40 AM.
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Old 12-07-2003, 11:33 PM
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Join Date: Jun 2001
Posts: 90
Ok, the progress so far ,is that the auto electrician has replaced the rectifier diode plate now for the third time, i said to him this is outragous, he did`nt chare me for it, but did let the problem slip out , each time he`s replaced the diode plate it`s been with what he calls a 6 x diode plate and that`s the problem, he cannot get the original Bosch 9 x diode plate from Bosch, which he says must be a bit more rugged than the one their giving him.
Can anyone comment on what`s been happening.
(a new alternator here in Australia is a whopping $550.00) no thanks!
Cheers George
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Old 01-02-2004, 06:16 PM
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Join Date: Jun 2001
Posts: 90
Can anyone reply on this, an autoelectrician perhaps?
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Old 01-03-2004, 11:39 AM
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Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,322
Can anyone reply on this, an auto electrician perhaps?

Hello George
Problem: faulty exciter diode in the alternator.

Answer: Replace the diode pack.

Problem: Replaced the Bosch 9 x diode plate with Bosch 6 x diode plate, multiple Bosch 6 x diode plate failures.

Question: Can anyone comment on what’s been happening?

Answer: Bosch 6 x diode plate is one third the capacity of the Bosch 9 x diode plate.

Solution: Need local source for the Bosch 9 x diode plate or friend to help find one.
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