I have put on 2 alternators and it still will drop below 8 amps on the amp gauge from time to time, it seem to be worse more at low speed than high. It never fails to start. Also the radio changes station all the time by its self. Thanks jarrell
Find the ground wire off the block and follow it prob to the fire wall and take it loose wire brush behind it and on the connector and tighten it back up. gm put thiere grounds over paint alot of times
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The problem will be in the alternator,it is not charging enough,and it is on it`s way out,If this was at all helpful,please rate,the voltage at the battery should read with a volt meter,13.65 volts to 14.25 volts with the headlights are turned on,and ac on high blower motor.If it is not in this range,replace the alternator.
You put pulleys on to increase power , but slowed down the alternator. Theres your sign. At idle speed the alternator isnt spinning fast enough to charge. So you can put original pulley back on, or a smaller alternator pulley.
could be the wrong battery check the craniking amps to see if u got the right battery sometimes these auto parts stores give the wrong item also make sure your cables are clean when clean pour some coca cola on them so they dont corode
Check the gauges, if the car
is equipped with them. If you have a volt/amp gauge, it will read the
alternator output for you. Turn on the blower fan for the AC or Heater,
the headlamps, and any other accessories that put a strain on the
alternator, and watch the gauge to see if it decreases voltage or
amperage. As a rule, if the voltmeter is higher when the engine is
running then when the engine is not, you can confidently assume that
the alternator is charging.
Open the hood, and with the car engine off, loosen the negative battery cable so that it can be removed with little effort. With the battery
cable still loosely attached to the terminal, crank the engine, then
pull the battery cable completely free of the terminal. If the engine
continues to run, the alternator is providing enough voltage to power
the electric circuits that provide spark to the spark plugs, electric
fuel pumps, etc. You can increase the demand on the alternator by
turning on headlamps, heater blower fans, and other electrical
accessories to determine the draw capability of your alternator. If the
engine immediately dies when the cable is removed, the alternator is
1. Put a voltmeter as close to the
alternator as possible. (Positive and Negative both.) If you can put
the meter leads directly on or in the wire coming off the alternator
that would be optimum.
2. Now start the car and turn all
accessories off and check the voltage level. It should be between 13.5
and 15.1 volts. (depends on your make and model of car) It is a good idea to write down all voltage readings your taking.
The main thing your looking for is a drop in voltage. Once you hit
around 12.5, your alternator is not going to produce any additional
3. Now turn on one accessory at a time. Write down
that accessories fuse rating. Keep turning on accessories and adding
fuse ratings until the voltage falls to 12.5. Now add 15 amps if your
electric cooling fans are on and 10 amps per battery in your system.
Your numbers may look like this.