Have 03 Ranger 4x4 4.0 4dr.
When running at times, dash lights go out, engines sputters, when driving constant speed alt gauge runs near middle, but under hard acceleration gauge drops to low.
Original battery showed 10.8 vbolts, replaced with new. Still has problem intermittantly, but growing stronger. Battery has 12 volts. Alternator test showed only 12 volt output.
Can the brushes, rectifier in the alternator be changed without much problem, or should I just get another alternator?
All kinds of other strange problems appear as well. Installing key in ignition causes dash lights to flash, clicking sounds, even before key is totally inserted.