No external regulator the PCM controls ALT output so if high then PCM is a fault

Answered by Docfixit (expert)
18,420 answers provided

Thank you for clarifying Docfixit. That actually makes more sense.

Response from Gman316
2 questions asked

Most manufactures doing that now say it provides better current flow to system but does add cost to ALT repair.

Answered by Docfixit (expert)
18,420 answers provided

Good Afternoon,
I am having the same problem with my 04 Mazda 6, 2.3L 4cyl. I had it checked at Advance Auto the other day. Battery good, starter good, but alternator putting out 0 current. He told me to check all wires first before changing anything. It started after driving from NC to Maryland Sunday night. I got home and the battery light flickered. Drove it to work on Monday but when I went to go home, battery light came on and stayed. Went to pull off and car went from 1st to 3rd and would not downshift to 1st when I stopped. I had to take off in 3rd gear. I switched the car off and was now in 1st. Also, it would not manually downshift to 1st either. CEL (Check Engine Light) also on - Coolant Temprature Low (that will be another post because I changed the Coolant Temparature Switch and CEL stayed off for about one month).

I read on some other sites that 1 guy changed alt 3 times and CEL was still on so I don't want to hane to go through that process. Is there a sure fire way to determine the problematic source? BTW, not good with volt meter!!

Thanks

Answered by CATWillMazda-6
0 questions asked