SOURCE: the battery does not charge and if i use a new one
that car may have a fuseable link that protects the alternator . if its got the magnetic field the light is off and your not seeing over thirteen volts when the engine is running you should check all the fuse links under the power control module. if any break apart with slight pulling they need replaced. and the way of testing if the field is energized would be to hold a screw driver or other ferrous metal instrument near the rear and center of the alternator and if it is attracted then the field is active . then check connections. if the field is not present check for the field voltage at the connector with the key on engine running. if not present check its source and correct as needed . if all checks out . the alternator should be pulled and tested at just about any auto parts store to verify before replacing..if the alternator checks out under a load and the field and connections are good then you could assume the voltage regulator .the correct charge should be 13.8 volts to 14 . anthing more will boil out the batt any less and it wont recover after repeated starts and running the accessories
but never replace a part that you have not ruled out every other possibility and confirmed is lack of function ..unless you like throwing money at a problem and hopping to get lucky..
an 85 aries is not a car some one of means would own so I would take some time and go through the steps above .
SOURCE: bought a new battery rode
To check the output of the charging system, first, you must start with a fully charged battery. Then connect your DVOM (Digital Volt Ohm Meter) across the battery. Red meter lead to the positive post and the black meter lead to the negative post of the battery. Put the meter's function selection switch in DC VOLTS, 25 VOLTS OR GREATER scale. Start the engine and bring it to a high idle. Your meter should read between 14.5 to 15.0 volts.
If not, find where the regulator plugs into the alternator. A Big Twin is in the front of the engine and the Sportster is behind rear cylinder. In the stator side of the plug, there are two metal contacts. This is where you're going to check the voltage output of your stator. Put the meter's function switch in AC VOLTS, 50 VOLT OR GREATER scale. Start the engine and insert either meter lead into one metal contact and the other lead into the other contact. Do not allow the leads to touch each other or the engine case. Bring the engine to a high idle. If you're working on a Big Twin, you should be reading at least 30 volts, a Sportster should read about 25 volts. If you don't read this much, your stator is bad, If you do read this much, it's probably the regulator. But, since you said that you've changed the regulator at least once, I'd guess maybe another problem. Make sure you regulator is grounded to the frame. I always put one of those star type lock washers between the regulator and the frame on both mounting bolts. The regulator must be grounded.
Good Luck
Steve
SOURCE: ford focus 2003 will not hold a charge/new battery
Checking the battery terminals are tight a grease free is an easy test.
The alternator needs checking to make sure it is charging the battery when the car is in use otherwise the battery will just deplete. :)
SOURCE: battery doesn't charge
why is my battery on my aprilia 50sx boiling over any ideas will be much appreciated many thanks bob
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