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1970 chevy impala gen light on slightly, changed regulator(it is charging) battery good 350 motor

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It is fine if it was me though i would get to a chevy 2 prong alternaterbut thats just me

Posted on Sep 25, 2009

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2005 chevy astro van 4.3l V6... Alt not charging, changed battery, new alt... still no charge... check the 12 gauge fusible link wire @ starter... was good... what could it be?


Could be the circuit from the key that tells the alternator to energize.
You may have a 10amp fuse marked GEN that could be blown, and there could be a problem with the body or engine computer which controls the internal voltage regulator. You may need a shop manual to get the test procedures.

Nov 17, 2015 | Cars & Trucks

1 Answer

98 chevy malibu my alt isnt charging new alt batt test good cut out the fuselink on starter the alt wire runs thru firewall If i run a wire straight to the batt it is putting out 19v any suggestions


Did you check the fuse in the under hood fuse box ? GEN / BATT fuse 10amp . Is your check engine light on ? This is a computer controlled charging system , it should have four wires connected to the alternator . 1 - the heavier wire on the back ,this comes fro the starter - the one with fusible link , you could have checked for battery voltage with voltmeter ! The three other wires in the connector are the orange one ,this comes from the GEN / BATT fuse an should have battery voltage ! The last two come from the PCM - engine computer . The gray wire is the turn on signal from the PCM an the Red wire is the control from PCM ! Charging System Wiring Diagram MOTOR Magazine Article MOTOR Information Systems

Aug 14, 2015 | Cars & Trucks

3 Answers

How can I bypass the security code


Why do think the key security is bad? If you still have a factory key, this is not the problem...if no factory key, you can take your VIN number or original key to GM dealer to get new key that they will program for you...Check for dirty battery connections:)

Apr 30, 2015 | 2003 Chevrolet Impala

2 Answers

My 1970 chevy truck overcharged only when headlights are on


Have your alternator tested it may have a burnt diod.

Apr 09, 2014 | Cars & Trucks

1 Answer

No charging on a1959 MG A.


I can't rem but that a generator on that? The you need to check the gen, the regulator and the battery. Start with the battery as you need some power to excite the gen before it can make any power. If thats good and yo can run it check the gen output. The ouput will vary with rpm so as long as you have something it should be good. Next will be the external volt regulator. At a fast idle you should see about a half volt over the system rating Again not sure if that one is 6 or 12 volts. The gen and regulator can be rebuilt or replaced

Jun 04, 2012 | Cars & Trucks

1 Answer

2005 chevy impala driver side power window is not working how can I fix it?


THEIR ARE A FEW PROBLEMS THAT IT COULD BE,SOME MECHANICAL KNOWLEGE IS REQUIRED, THE EASIEST THING FOR YOU TO DO IS TO TAKE THE DOOR PANEL OFF,FIND THE PLUG THAT GOES INTO THE WINDOW MOTOR GET A HOT BATTERY WITH TWO JUMPER WIRES AND ATTACH THEM TO THE BATTERY AND TOUCH THEM TOO THE PLUG OF THE MOTOR YOU CAN REVERSE THE WIRE FOR UP OR DOWN.POS NEG OR NEG POS FOR UP OR DOWN.YOU COULD ALSO HAVE A BAD MASTER WINDOW SWITCH IVE SEEN THAT IT WILL WORK IN ONE DIRECTION AND NOT THE OTHER ,AND MANY OF PEOPLE HAVE THOUGHT IT WAS THE MOTOR .THATS WHY I IF YOU DONT HAVE A EXTRA MASTER SWITCH LAYING AROUND TO TEST ITS EASIER TO JUMP THE MOTOR,IF IT GOES UP AND DOWN AT THE MOTOR THEN SWITCH IS BAD OR FUSE OR RELAY ...WHICH YOU SHOULD CHECK TOO BUT USUALLY IF THEY ALL THE OTHERS WORK THEN PROB NOT A RELAY.ALSO CHECK ON EBAY FOR YOUR PART ITS CALLED A WINDOW REGULATOR AND MOTOR IT COMES ALL TOGETHER.ITS BOLTED TO THE DOOR .IF YOU TOOK IT TO A SHOP EXPECT TO PAY 250 TO 350.THANKS AND GOOD LUCK

Aug 04, 2011 | 2005 Chevrolet Impala

1 Answer

I have a 1991 chevy truck 350 engine 4x4 with air it started back charging the battery so I change the alternator with a new one and now it does not charge now


make sure the old and new one is rated for the same rpm,and amp ratings. also knote if they have the internal regulator, or are externally regulated. where as the altinator may not have been over charging, but the regulator just may not have been doing its job correctly. also some altinators need whats called the (sense) wire hooked up correctly in order to operate.

Jan 28, 2011 | 1991 Chevrolet Crew Cab

2 Answers

How to install 350 chevy frame mounts in a 1985 chevy impala


The 1985 Impala came standard with the Chevrolet 305 V8. All Chevrolet small block V8's from 265 cubic inches to 400 cubic inches from 1957 to about 1989 used the same block with almost no difference in the castings, so the motor mounts should fit from one block to the next. If you are trying to swap in a 350 newer than 1989, then the motor mounts are different, and you will have to have them fabricated by a local welder, machine shop, or perhaps the best, a local short-track race car driver/builder. Those guys can build anything.

Feb 16, 2010 | 1985 Chevrolet Impala

1 Answer

1994 chevy impala will not start battery is charged


if the pass key light is flashing you may have to take it to a shop and have it diagnosed. i had this problem with my 98 sonoma. my problem was that the pass key sensor was bad. for some reason the car is not recognising your ignition key and is going into security mode. this one is almost impossible for the do it yourselfer unless you have a scan tool. (not a code scanner) this is how gm gets you.

Mar 16, 2009 | 1994 Chevrolet Impala

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