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my alternator went out the other day. so I replaced the brushes, and still nothing! so I pulled it again, and now i'm lost. I got the alternator apart and I'm testing the diode assembley, between the diodes I'm getting resistance about 2.5 ohm's, the book says there should be infinite resistance between the diodes. so does that mean that where should be no numbers on my meter? this is out of a 00' tacoma 3.4L. what eles should I check well I have it apart?m
 

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If your measuring the diode pack correctly since polarity of the leads matter then your diode pack is bad.

2. Does your multimeter have a diode setting?

http://www.deserted1.com/FSM/Repair_Manual/03tacoma/ch5vzfe/gene/insp.pdf
These are the procedures for checking the alternator. The placing of the leads has to be exact due to polarity when dealing with diodes.

Procedures are the same for 2000 Tacoma. This one had better pictures.
 
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