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First check voltage on your battery with a multimeter a fully charged batt should be 12.6 bolts . Disconnect the battery from the car check voltage, second tyical voltage regulator maintain voltage between 13.5 and 15.5 . 15 when cold and 13 when hot. The regulator allows higher voltage to force electrons into you batt. If batt voltage is under12volts change batt. Is your regulator does not maintain 13 or above change alternator or alt regulator. Good luck
the relay will not alter the charge rate but the voltage regulator will
regulators reduce the rate of charge according to the battery voltage so if the battery is fully charged at 13.2 volts it is possible that at idle speed , that voltage recorded from the alternator is correct
you can check by inducing a discharge such as turning on the head lights and ac unit and then increasing the rpms to around 2000rpms where alternators are checked
There is a fuse or fuseable link between the alt and battery, and the alt gets a signal from the key to activate the voltage regulator. I would check for batt voltage at the alternator and you may need a wiring diagram to check for key voltage.
Check voltage regulator. Also try to see if anything is possibly draining the batt while not running. Is the alternator charging at the right voltage? Do not remove terminal from batt to check alt. this can burn out a diode in the alt.
If you disconnect the battery for 20 min it should kill all memory and reset everything.If not you charge is still low charge up your batt. with a charger.and test your alt. output 13.9-13.7 you have to check the book.I'm not to sure on that.You might have a voltage regulator problem bad batt. Or somthing is hooked up wrong. Mabey the old alt was fine. Have the batt. tested. All alt. well most are rebuilts so you might have a bad one it happens.Make sure that it's putting out a charge. Loose alternator drive belt or loose or corroded battery cables. The battery itself may also be bad.
Sounds like you may need an alternator. If the batt is ok, could be the alt going out. A local pep boys or equivalent can check free or inexpensively... The voltage regulator is built in to the alternator... so if you change the alternator, you change the regulator too. k
14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.
Voltage regulator is built-in to the alternator assembly.
Have you tried replacing the battery?
A battery with a shorted cell will not charge properly and may even damage an alternator or regulator.
Note1: use a digital voltmeter (about $25 at Lowe's or Radio Shack) and
check voltage across batt terminals while engine running. If more than
12.6 Volts DC and more typically about 13 Volts, then the alternator is
Note2: from Jan 98 to May 98 shows a different part # alternator than June - Dec 98
check the manufacture date on your driver door edge.
if i were you i would check the alternator again. just take something steel and touch the top of the alternator but be very careful not to touch the pully. if you feel a magnetic pull on the alternator then then is not it if thier is not a pull then the alternator is bad its common to get a faulty part back from some places but if thats the case then go get your money back from where you got it. also check the batt. cables may not be tight enough.