It looks like you're new here. If you want to get involved, click one of these buttons!
Mazda B2500 Electrical charging system overcharging
I have a 1999 B2500 that I experiencing electrical charging issues that I cannot determine root cause. I am on my 3nd alt in 5 weeks. The last (new) alt charged 13.5 vlts at idol and 15.5vlts at about 2500 RPM. The alt surface temp goes to around 190 degrees after 15 minuets of driving normal in town. The first alt just quit charging the battery enough to operate the vehicle. The second alt failed with a melted main post on the back side at the lead supply cable. Now 5 days later (with the 3ndalt) the truck just quit running...battery too low to operate the vehicle.
Question: is there something within the electrical system of the vehicle that controls the alt or would cause premature alt failure?
Please advise Thank you, Braveheart3