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I have a 97 ford ranger and I was driving and the battery died so I had the battery check and they said that it was good so I boufht a new alt but it didn't work either so I got it checked and it was bad and I got new one and got it testwd and it works but put it on and the battery gauge says battery low won't go down or back up to normal an help be awesome

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  • Cars & Trucks Master
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The alternator you finally ended up with may not be compatible with the regulator system requirements for your car. Some alternators have an internal regulator and others have an external regulator. I suggest you take the car to a reputable auto electrician to help sort out your problem

Posted on Oct 13, 2013

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SOURCE: 2004 Ford Ranger Low Idle

I figured out what was going on. supposedly on ford rangers the Idle Air Control Valve (IAC Valve) goes bad. i got a trouble code looked it up and sure enough it is the IAC Valve. Under 100 bucks for the part

Posted on Jul 13, 2008

yotaguy
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SOURCE: low battery gauge indicated

Not necessarily,this can also be caused by poor battery cable connections or a bad battery cable or a bad connection to the gauge or just a bad gauge.Check or have them checked first,and then have the alternator output tested,a voltmeter connected at the battery posts should measure 14.5 to 14.8 volts at an idle,any lower than this than the alternator is the problem.

Posted on May 30, 2009

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SOURCE: 97 ford ranger/check eng. light on/P1443 DTC

P1143 Air assist control valve range/performance

Could Be your mass air flow sensor. Start there.

Posted on Jun 09, 2009

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SOURCE: get spark, but no power to new fuel pump 1999 ford Ranger

the inertia switch is in front of the passenger seat, bolted to the fire wall, hidden by the carpet on an 89 and behind the kick panel on the 99. 99 should have a picture that looks like a gas station pump with a line thru it. pull panel off, push big red button. on 89 its the little grey button on the top.

Posted on Oct 03, 2009

Testimonial: "This contributor is a Wizard! Within 5 minutes of reading his answer, the truck is running! Thank you SO MUCH!!!!! We never would have gotten it. CS"

localwonder
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SOURCE: 2000 ford zx2, battery light keeps coming on/off,

There seems to be a no charge state in this case. i recommend checking the charging system. use the procedure below to isolate this issue.

Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)

To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)

The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)

Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

Posted on Nov 02, 2009

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