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Bad diodes: Replace them or the alternator

I was told I had bad diodes in my alternator. Should I replace the whole alternator or replace the bad diodes?

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  • Suzuki Master
  • 20,706 Answers

Told, and what tests did they do , in order to say, those magic words.
(max amps tests under max load (tools) or a scope test.
if they didnt do those to tests, they are just Guessing.
if you want to guess. why not do that yourself, after all its your wasted cash , not his... see?
IMO, youll never ever get the diodes out and back in , and not mess it all up. (some are easy , most are hard.)

if on the other and all all this post really is , is the failure to state
the symptoms, and then asking how to do the tests. then we can do that.
let me guess, (i roll the dice) and land on.
Battery will not charge, driving, and voltage is not 13.3v to 15v driving.
so the battery discharges, and the soon the engine stalls.
did i guess right?




Posted on Nov 20, 2013

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Posted on Jan 02, 2017

localwonder
  • 6784 Answers

SOURCE: i HAVE A BAD ALTERNATOR AND KNOW i HAVE TO TAKE IT

Removing the Old Alternator Step1 Pull your Mazda into the garage or your work area. Turn the car off and let it sit for a while to cool. Step2 Begin by disconnecting the negative cable of the battery. Step3 Remove the serpentine belt from the pulley on the alternator. Do this by using a socket wrench to turn the serpentine automatic belt tensioner so that it allows slack in the belt. Then simply slip the belt off the alternator pulley. Step4 Locate and disconnect all the mounting bolts on the alternator, use a vehicle specific manual if you have any trouble. Step5 Disconnect all wires attached to the alternator then remove the alternator from the Mazda. Installing the New Alternator Step1 Slide the new alternator into place. Do not worry about the serpentine belt yet. Step2 Replace the bolts that held the previous alternator to secure the new one in place. Step3 Attach the wires to the new alternator the same way they were attached to the old one. Step4 Adjust the serpentine belt tensioner the same direction you did in Section One to put slack in the belt. Wrap the belt around the pulley of the new alternator and then remove the socket wrench from the automatic belt tensioner. Step5 Inspect the belt to be sure it is not snug and follows the path required in the pulley and belt configuration diagram. Step6 Hook the negative battery wire back to the negative terminal on the battery.

Posted on Mar 21, 2009

michigan man
  • 3533 Answers

SOURCE: A/C compressor bearing sounds bad. Can bearing & pulley be replac

it is best to replace the whole compressor but if it was me I would go and get a can of 134A oil and put that in first to see that helps with the problem and if not then replace the compressor they are somewhere around $40 to $75 at a good salvage yard and you can try www.junkyarddog.com and if you cannot find one there try www.schramauto.com or call them at 1-800-292-1032

Posted on Mar 22, 2009

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