Detail: O5 Montana. Replaced alternator and battery. Battery keeps dying????
Solution: Before starting the engine,put a voltmeter on the battery,it should read approximately 12.7 volts at rest.Now start the van,the voltage should rise to approximately 13.5 to 15 volts.If voltage does not rise you may have a defective alternator. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck! , Stecorbett: May I suggest that you drive your car to one of the major auto stores and they can and will check your alternator for you to make sure it is good/bad.These places like AutoZone do this all the time. They do not charge for the check out. (Of course they are hoping that if you need a part you will buy it from them. One other suggestion. If you do need a new alternator, get a rebuilt one. It is cheaper and most always comes with a warranty. Hope this helps Good luck Loringh PS please take a moment to give me a rating , Hi and welcome to FixYa, Initially, it could be the alternator or more specifically the voltage regulator inside the alternator. The function of the alternator is to produce the necessary charging voltage to replenish the charge of the battery. This voltage is then funneled and controlled by the regulator. Of course even if the alternator/regulator is good, there could be other possible reason(s) why the battery looses or is not charging such as loose wire/connector/terminals or a partial electrical short/fault draining the battery when parked. To crank (turnover) the car's engine, a starter is used. Good luck and Thank you for using FixYa. , its definitly something taking power ,have you install something new lately,car stereo,amp,if not could be just car trunk light,under hood light,stays on.things to check , look for a fuse under the hood check owner manual but it would be in a black plastic box and should be labled or may be a fuselink , i work for advanced auto the altiniator can bee goood but the voltige regulator is bad