Question about 2003 Chevrolet Suburban

1 Answer

2003uburban not charging

I have a 2003 suburban with a 145 amp alternator. Raplaced the alternator, and had the battery tested good, battery charge light still is on. The alternator has a three wire connector that indicates 0 volts, 10 volts and 0 volts. Battery voltage is 12.8 v. Also when I remove the positive battery cable and place a light tester between the positive battery post and the hot wire to the main fuse block it lights up, ( approx 2.8 amps ) nothing is on and the key is not in the ignition. To summerize: Alternator tests good, Battery tests good, no fuses are burned, charge light is on and there is a load between the battery and the main fuse block under the hood.
If you could help me out I would be so gratefull Thanks Frank

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 44 Answers

Make sure you have power to the back of the alternator and make sure you have power from the plug

Posted on Apr 07, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why wont the battery charge

take battery out and take it to a auto parts store have it tested if its good then its an alternator problem sometimes its wire connections you can look up alternator to see what it looks like then go out and buy a can of wd40 and spray it on the electrical contacts you can reply me

Jan 14, 2015 | 2003 Chevrolet Suburban

1 Answer

Well our 2003 ford focus wagon when you start the car the battery light comes on and its not charging but if you hit the accelerator the light brightens and it starts charging and light stays on i've put a...

You have installed many parts, but missed the
entire process of repairing any vehicle

First you have to learn the system your about to work on,
by looking at wiring diagrams & also gather other info from
various sources,so you can have a point to start your testing

If all I do, is go by what you wrote here

I would say you never did any testing ,to even
find a problem

No mention of checking for codes

That is what you do, after you confirm the battery
is good,fully charged & holds a charge & test it

Aug 20, 2014 | 2003 Ford Focus

1 Answer

The battery not charging light comes on when starting engine

-Check alternator out put. If not supply enough voltage. It won't charge.
-If alternator is good then time to replace new battery.
(Each battery's life is last ONLY 5 years)


Oct 09, 2013 | 2003 Chevrolet Suburban 1500

1 Answer

2006 ford 3/4 ton 4wd bad alternator voltage regulator

could have wrong amp alternator or battery could have short in alternator field wires or battery feed wire or damage.bad battery cables cause high resistance in charging circuit.

Feb 23, 2013 | 2003 Chevrolet Suburban 1500

2 Answers

2003 bmw alternator giving 14volt no charge to battery

Can not charge a dead battery

You should have just over 14 volts running, if battery
is good

Current or Amps is not the same thing as voltage

You can check that also if you have an amp clamp for the
volt meter

Nov 29, 2012 | 2003 BMW 325

1 Answer

I have a 2003 Suburban. Would not start, so I jumped it off. As long as the cables were hooked up the truck ran. When I took them off, it died. I took the alternator and had it tested and it passed 3...

Yes a bad battery can cause this problem. Pull out the battery and take it to have check also. But, your wiring to the alternator maybe at fault. If your alt. is good but, it is not charging the plug or a wire may not be making contact. Check your battery. Check for any broken, burnt loose wiring. I know you just had it out. But check the wiring at the battery. The smaller wires are whats called "fusible links" meaning they are fuses. Tug on them a bit to see if inside the insulation you can feel the wire separate. Hope this helps Fix Ya up.

Aug 22, 2011 | 2003 Chevrolet Suburban 1500

2 Answers

Chevy Suburban 1500 -- Battery Not Charging Light....Replaced Alternator....Still had battery not charging light....Replaced battery....Still have battery not charging light...also first time seen service...

Make sure that you buy a 'lifetime' warranted alternator from your parts source to avoid problems with bad alternators out of the box. I would try to return and exchange the alternator with one that tests out ok on a bench, in order to verify if the wiring in between the alternator or the alternator itself was bad.

Service brake booster would have to do with the vacuum or power booster problem around the master cylinder for the braking system. That wouldn't have anything to do with the alternator, I do not believe.

Good luck on these repairs.

Jan 08, 2011 | 2003 Chevrolet Suburban 1500

1 Answer

I have a 2003 suburban that keeps displaying a battery not charging code. I have changed the battery and the alternator. Need advice please help.

Try hotwiring the alternator charge terminal directly to the battery positive terminal. If this eliminates the code, your fusible link is bad or the wire is loose in the junction box. If it doesn't eliminate the code, something is wrong with the PCM or the wiring to the PCM. Pull the connector off the alternator and check the terminals on both the alternator and the connector for good contact.
PCM failure would be very unusual in this mode. If you have questions, please let me know.


Oct 31, 2010 | 2003 Chevrolet Suburban 1500

1 Answer

I've replaced the battery and the alternator on my 2003 Isuzu Rodeo. But when traveling for several hours with headlights on the battery will go dead and the alternator won't charge till it cools off....

Sounds like there's still something wrong with the charging system. Did you verify alternator output?
(Volts/amps) Should charge at about 13.5 - 14.5 volts when engine at medium idle. About 65 amps w/o a/c, about 85 amps with a/c. If you've got the non a/c alt in a vehicle with a/c, amps falling short may cause intermittent charging/problems.

Does engine exhaust leak blow on alternator? Had this symptom before-it can ruin your alternator also.

Battery going dead-either the battery won't HOLD a charge or the alternator is not charging it. One or the other is your problem. Verify alternator output as described earlier, then need to do a LOAD test on the battery with a full charge.

Hope this helps.

Mar 19, 2010 | 2003 Isuzu Rodeo

1 Answer

2003 Ford Focus battery light is on, but alternator appears good

Disconnect battery ground for 30 seconds & reconnect. Light should be out unless you have deeper diagnostic problem. Charging system good Battery good. This action should reset trouble light. Good luck!

Dec 29, 2009 | 2003 Ford Focus

Not finding what you are looking for?
Cars & Trucks Logo

220 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

71288 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7009 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides