have a 2002 mazda tribute. starts up with a charged battery,able to drive throughout the day, but really using any like defrost,heater,etc. had the battery checked, pulled alternator twice,now. went had it tested,then put it back in. went had both tested the altenator and baterry with the car running both tested that they were working just fine. well as day goes on and the battery light comes on.battery is dying, cause for some reson the altentor isn't charging the battery. like ifound out both of them tested good.my voltage readings are ,with the vehicle running the terminal itself was 11.86,the bottom wire was 11.5,the middle wire was 7.60,and thetop wire was .60 now with the car off the terminal read 11.86,the bottom wire read 11.5,the middle 11.3, and the top wire .0 i don't understand in the voltage dropping except possibly the regulator is defective?
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2002 Mazda Tribute
Question: is it the regulator?
Answer #1torque wrench from Stewart's Auto Repair LLC, January 15, 2011, 21:26Master
those readings are to low to keep the battery charged , I don't have a wiring diagram in front of me for this car but the voltage regulator is internal to the alt. on this model I think and the charge signal is from the pcm, if so you have a problem in the (pcm)
powertrain control module.