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What should the alternator execution wire read

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Around 14V is what the alternator should be putting out.

Posted on Dec 24, 2016

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I have a 06 gmc envoy xl 4.2...battery meter fluctuates back and forth from 14 Down to 9. When it does this and u have to shut it off it will not start back up without a jump. Alternator and battery were...


Bad plug or broken wire at the plug, at the alternator. Pull the plug off the alternator. Turn the key on and check for power and ground at the leads. No reading, probe the wires a couple inches back. If a read there fix or replace the plug. If you have a 3 wire plug, best to use an ohm meter. Test each wire separately. At the pin and a couple inches back on the wire. This test may include testing the wire back to the PCM and fuse panel. You'll need wiring schematics for this. The PCM is what fields the alternator to charge and supply power when the engine is running.

Aug 07, 2016 | 2006 GMC Envoy Xl

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THE ALTERNATOR IS NOT CHARGING THE BATTERY WHAT IS THE SOLUTION


Loose drive belt---loose wires or connections on alternator--- Dirty battery terminals--clean to shiny metal both battery and leads.---- faulty rectifier in alternator.. Pace a multimeter across the battery terminals and set to dc volts reading Place revs at around 1500 rpm and read voltage . if no reading set to ac voltage and repeat. If you get an ac volts reading replace the alternator.

Mar 16, 2013 | Cars & Trucks

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2000 Cavalier 2.2: Put in new starter. 2 days & it


The battery and alternator may have been ok.
You have a fuse or fuseable link between the alternator and battery to protect it. If you have battery voltage at the battery post and not at the alternator post, there is a break in that circuit.
If the battery cable goes to the starter, the alternator wire may go from there and that could be where the fuseable link is.
Fuseable links are special thin wires that act like fuses.

Jan 11, 2013 | Cars & Trucks

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Wire diagram for chevy 3500 van


When you say charging,do you mean amp reading or volt reading?Amps should rise when first started then drop.Volts should stay close to constant.The small wire going to the alternator to power the regulator in the alternator is just switched power.If the volts fall under 14 after ten minutes you may need to try a replacement alternator.

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Trying to remove the alternator from under the engine on the right side what needs to be done and what tools do i need


You will need Box spanners to execute the work but with the availability of double end spanners and ring spanners based on your ease of work it will be an added advantage.
remove the clamps fitting the alternator to release, remove belt , disconnect wires ( while making a note) and removing .

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1 Answer

I have a 94 merc cougar xr7 with a 3.8. the batt light is on and the volts are reading 12.38 roughly when running. the ignition wire has 12v rinning to it and the batt wire to the back reads 12v. the...


Need to check voltage at back of alternator, should have no less then13 volt's, if you do alternator is good, this is just a self test for you, with engine off, with test light check for voltage at back of alternator, test light should light up, if it don't look for blown fuse link at starter solenoid on fire wall. most of the time a fuse llink will have a tab on the wire, pull genly on wire, if it feels rubber like, bad fuse link,

Aug 17, 2010 | 1994 Mercury Cougar

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84 CK TRK, 2500, 5.7L 55,000 miles have replaced alternator twice - battery still reads 12 volts. Trickle charge on battery OK and engine starts up OK - terminal 1 on alternator wire (brown) reads 2.4volts...


On some of the older style GM's you can take that brown wire and cut it and take the end leading from the alternator and hook it directly to the hot terminal on the alternator and just leave it hooked up and it will work. But I have ran into the occasional problem where leaving it hooked up will drain the battery when the vehicle isn't running. Hope this helps..

Oct 24, 2009 | Chevrolet Silverado 2500 Cars & Trucks

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Wiring an amp meter diagram


put the meter in series remove wire gointo back of alternator put one lead on wire and one on alternator that should give you your reading

Jul 23, 2009 | 1990 Volkswagen Passat

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