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tobesmcgobes

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About tobesmcgobes

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  1. My understanding is the regulator for the alternator is in the PCM - not the alternator. All modern Mazda's are this way, and I assume this must have been one of the first ones that started this way. All my wiring between the PCM and the alternator has tested okay. I've even bypasses the factory wiring harness, and put in a wire straight from the PCM to the alternator - no change. I believe my PCM has failed, I just want confirmation. Does it output a changing voltage, dependent on load? I'm looking at maybe getting a PCM off a wrecked car, but wondering if there are other options.
  2. G'day all. Wondering if anyone can help me out? I'm having problems with my charging system - specifically the PCM control of the alternator. I'm getting B+ to one wire of the plug (W/R), and 0V to the other wire. I've already determined it's the PCM at fault, I'm just not keen on spending $3,000 on a new PCM through Mazda. I'm trying to make a work around, just need to know what voltage I should expect at the second wire? When I apply 5V in place of the PCM, the generator outputs 15.5V. It's the W/L, LG/B wire going to the PCM. The car is a 2000 626 GF Series 2
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