Thanks dude I will do that in the morning after replacing a fuel line that blew above the gas tank

 

OK, Do as much as you can of the checklist I posted; they are very important.

 

Where did you post this?
Maybe you meant to say off the information posted by other members on this thread?

 

Having same issues took mazda in had
alternator checked dead in the water but this is the second one this year. Daughter randomly bought it used in Feb. We're not sure of its history but I'm guessing not the best salvage title.
Anyway battery same now looking at new issue what is causing her alternator to burn out?

 

Welcome to the forum

Generally it is better with service question to start your own thread for help. While it may seem that you have the same problem it is seldom the case to many variables. The one I see standing out is the *salvage title.
So maybe start your thread and a few of us can start a positive Q&A specifically for your Mazda.

Make sure when you do that you enter the vehicles information.

Year
exact model
miles
and any and all resent in the last 6 mo. service-related work done including what parts were replaced,

Also the estimated life of the battery?
And where and what brand are you getting alternators from as well new or rebuilt

So about the same information you would fill out at any service shop.

* salvage titles can hold key information about current running gear, drivetrain and chassis problems and concerns that can come up!


ASE

 

The alternator is controlled by the PCM/ECM.

I have seen PCM's go bad and fry the alternator & battery.

 

Same-ish problem.

1999 Mazda Protege LX 1.6L auto tranny.

• Always had to replace battery every 2 years or so.
• 10 days ago had car go into "limp mode" & charging light came on.
• Checked voltage and was at 17.5 V.
• Went down to 11.7V and car went into gear OK.
• Charge light is on now about 90% of time. 11.7 V.
• When charge light goes off V @ 13.5 to 14.1 - charging.
• No real circumstance when charge light goes off.
• New battery.
• Replaced alternator 2 days after initial incident.
• Cleaned main grounds @ engine & fender.
• Continuity looks good.

So what is next? What should I look for. ECU? Hard to find. Anyone ever use one of the ECU reprogramming services like Flagship One? If so, which is recommended. $150 for a reflashed ECU seems good.

Looking for any help. Thanks.

 

Time to start diagnostic on the ECU.

 

17.5 volts screams a regulator problem. Can be faulty or a bad earth.

 

How would I go about? Have a test/read unit on the way.