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Altinaitor not charging. Code keeps switching from alt to low gas to bat

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Try this, turn on your car once on leave on but unplug battery if the car turns off as soon as you pull the wires then your alternator is no good...if it stays on then it's going to be the battery

Posted on Dec 08, 2016

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1 Answer

New battery not charging after changing the alternator


First make sure both battery cables are free of corrosion and ground is secured to chassis and engine then check to see if theres an alt. fuse or bat. fuse blown. Another way to test charging sys w\out an meter is to remove the ground terminal from the bat. with the car running, if the alt. is good car stays running, if all else fails take the alt and bat to a parts store that will test them for free

Dec 14, 2013 | Chevrolet Venture Cars & Trucks

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Bad eld wire or ecu?


Sounds like the alternator is charging, but the extra voltage is not reaching the battery. You should have battery voltage on the large wire at the alternator with the engine off.
If not, that wire is fried or a fuse is blown.

Jul 07, 2013 | Cars & Trucks

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03 Taurus, battery light comes on. R&R bad alt &


You may have a a/c voltage leak comming from the alternator..If its a rebuilt alternator sometimes you get a bad one ..But make sure all your connections are good ecspecially the small wires coming out the back ..These are the field and sensor wires..Plus make sure all your grounds on the vehicle are not broken or missing..You can have good voltage but it may have a drop going to the computer because of a ground and cause the light to come on

Sep 15, 2011 | 2003 Ford Taurus

1 Answer

Car wont but changed alternator


check power to alt first , alt has one big red wire that bolts to back of alt that should be hot all the time. if it is not hot with fire check fuseable link that is in wire bolted to the starter. also has two smaller wires that plug in alt. one goes to charge lite or bat guage in dash, other wire goes to ign and should be hot when ign is on if it is not change ign switch

Mar 21, 2011 | 1986 Buick Electra

2 Answers

Battery on full charge then start truck drive to town and noticed volt gauge at low turned lights and access off got home shut truck off tried starting after shut down and noting but dead bat havn prob...


You need to fully charge the battery and load test it, then check the charging system and alternator drive belt for tightness. do not remove cable when running or it can harm the charging system...ok on older cars, no longer good practice. Quick check of charge system can be done with volt meter across the battery. Volts should read between 13 and 14volts and not drop over time. With all lights, heater etc on volts should be better than 12.5 (usually above 13 and again, not drop with time.

Oct 26, 2010 | Ford F-250 Cars & Trucks

1 Answer

Alternator wiring im trying to by pas a volt. reg. to charge a bat. witch wire do i splise strait to the bat. for charge


you dont slice any wire to the battery. the alt is turned on by grounding the green field wire on the back of the alt.THIS IS FOR TEST ONLY if you leave it grouned and drive it you will blow up the battery from all the hydrogen gas created by the massive overcharge. you also will damage every computer in the car from the overvoltage they will recieve.
the engine computer is the regulator for the alt.

Mar 20, 2010 | 1996 Plymouth Voyager

1 Answer

F 150 starts and starter stays engaged unplug alternator starts ok but no charge


2 problems, first you have bad starter or starter relay for starter staying engaged, keep alt plugged in has nothing to do with starter staying engauged, to test starter relay, jump at relay bat + post with red/bk wire on solonoid, if cranks over without staying engaged, then not relay or starter but rather in your ign switch, ford had bad problems with ign switch some years ago doing that

Feb 05, 2010 | 2006 Chrysler PT Cruiser

1 Answer

Charging system lights and acc dim to out, motor runs, alt and battery check good won't start with switch, but will jump


Ck your charging system with a meter at the batt posts. Charging range should be between 13.6v and 14.2v. The higher the voltage, the less the charging amps. You want it to be close to 13.6 if the batt is low and 14.2v if the bat is charged properly. It won't start with key because battery is too low. Good Luck

Jan 23, 2010 | 1995 Geo Metro

1 Answer

Good alt. will not charge good battery


the regulator should be in the alternator,is it a rebuilt one,if so you could have gotten a bum one, i'v had that happen to me three times in a row till i finaly got a good one, also make shure the ground wier is tite and none of the wiers are frayed or broken

Dec 20, 2009 | 1991 Chrysler New Yorker

1 Answer

Wires


if you have a 3 wire Alt :
you have to hot to the Bat.

than # 1 of the 2 pins goes to a switched hot (NOT to the Dist. the car wont turn off) this is what turns on the Alt. charging system
the #2 goes to the charging lamp on the dash

Aug 05, 2008 | 1984 Chevrolet Chevette

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