Question about 2004 Mitsubishi Montero Sport

1 Answer

Brake and battery light on new battery and alternator installed

3rd alternator on car. After a dead battery a month ago, first replaced alternator lasted about 1.5 weeks. Battery light and brake light came on. Took to autozone, and given a replacement alternator. Installed new alternator, was over charging the system. Took car to mechanic and had alternator replaced by professionals. 3rd alternator lasted about a two weeks, and now is showing the brake and battery light, but very dim while in drive and brighter at idle. All electrical items seem to be fine, nothing is noticable other than the brake and battery light on the dash. All alternators have been rebuilds, I find it hard to beleive that i am 3 for 3 with getting bad rebuilds. Connections seem to be good, could this be a fuse or something else stupid? any help would be appreciated.

Posted by Anonymous on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mitsubishi Master
  • 5,494 Answers

Wouldn't be a fuse, but it seems as if the alternator is still not putting out normal power, or else your battery has a problem taking a charge. Better have the battery tested for a dead cell. also see what a voltmeter says about alternator output now. If you have an electrical problem in the wiring somewhere or in the alt. charging controls, then possibly one or more of the diodes in the alternator may got burnt out. That means the alternator puts out less power.
On some newer cars, the engine computer, pcm, controls the rate of charge of the alternator. So you have to be careful diagnosing -know how your system operates. That's why mechanics always ask for year, make, model, and engine size if applicable.

Posted on Mar 19, 2017


6 Suggested Answers

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 25 Answers

SOURCE: New battery and alternator - still won't charge

try the battery connectors if you haven't already... sometimes replacing these is all that is needed to get the charge back.

If not.. check out a new starter.

Posted on May 17, 2008

SOURCE: alternator and battery issue

Did you fully charge your battery before you ran the new alternator? If not, the alternator is damaged and will have to be replaced.

If your battery has a dead cell it definitely destroyed your new alternator.

Do you have a voltmeter. Do you know how to measure battery voltage?

Posted on May 04, 2009

  • 1 Answer

SOURCE: 1999 Mitsubishi Montero XLS Sport has an

I have had a similar problem with mine. The repair shop is telling me there is oil seeping into the alternator and shorting it out. I am going to soo if I can put some sort of shielding around it to prevent this.

Posted on Sep 24, 2010

  • 2926 Answers

SOURCE: 2001 Mitsubishi Galant. Battery

P0421 is not the cause for a no start condition. It is a catalyst warm up code related to an O2 sensor. What is the engine size and mileage on the vehicle? Was the fuel pressure checked? If so, what was the reading? Is the engine getting GOOD spark vs. weak?

Posted on Dec 27, 2010

  • 215 Answers

SOURCE: 2001 Mirage 1.8. Battery

Sounds like you have a bad ground for your brakes lights. I would start by checking the light terminals in the back for damage, corrosion, or even burn marks. If you do find some they those terminals need to be replaced. There will also be a ground wire with a nut or bolt in the area around the light make sure it is also clean and free of corrosion and verify it is tight.

Posted on Mar 08, 2011

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Brake and battery light came on while driving.

The battery may not be charging, alternator, cable, or fuse problem.
The brake system may be low on brake fluid. The parking brake switch may be telling the light the parking brake is on.

Jul 18, 2012 | 2000 Mitsubishi Galant

1 Answer

88 rx-7 convertible doesn't click or start, new battery and alternator installed 2 months ago ... does the starter/ solenoid need replaced?

try tapping on the starter housing while somebody is in the car. have them try to start the car while tapping on it if it starts replace the starter. who may have a dead spot in the whindings. good luck steve

Jan 03, 2012 | Mazda H240 Cars & Trucks

1 Answer

I have a 95 nissan Maxima In June i got a new alternator put in. About @ months ago the brake light and battery light keeps flashing on and off every so often. What could this be?

Often when you lose an alternator its because the battery is too weak. Then systems start failing everwhere. Have the battery tested, chances are its got a dead cell in and you'll want to change it asap or it will cause damage to alot of relays and sub systems.

Jan 04, 2011 | 1995 Nissan Maxima

1 Answer

Going through alternators

Hi there, I am a girl (i.e. not car savvy), but I have a 1998 Altima as well, and the first time (4 months ago) I noticed the brake and battery lights on simultaneously, I took it to a Nissan service shop. Everything seemed fine until about a month ago when the symptoms returned. I ignored the problem for 3 days and the car just stopped running, period. Took it back to the shop, figured out it was a fauly alternator, got it sorted, no problem. Today (1 month after replacement), I see the same bloody problem, and I'm taking it back to the shop in the morning. I am wondering... is it the alternator, or something connected to the alternator that is malfunctioning? The 2 alternators put in were "rebuilt" since they didn't have genuine Nissan alternators available. I really hope the dealers aren't taking me for a merry ride.

Jul 13, 2010 | 1999 Nissan Altima

1 Answer

My a/t oil ,brake, and battery light have all come on in my 2001 nissan pathfinder..the battery was just replaced about 3 months ago..have any idea what could be wrong?

The incorrect battery was installed , the alternator is defective or the wiring connected to the alternator and battery cables are defective (corrosion and looseness)

May 04, 2010 | 2001 Nissan Pathfinder

1 Answer

Brake and battery light are on in my 85 toyota pick up

sounds like a alternator take the truck to a local rebuilder and have him test it

Apr 09, 2009 | 1991 Toyota Pickup

1 Answer


Replace the alternator with a new one not a used one.

Nov 28, 2008 | 2001 Nissan Xterra

4 Answers

2000 Nissan Maxima Battery & Brake Light On

I thought this was free support. Apparently I was wrong. How did I fix it? Easy, I broke down on the freeway and got towed home on a flatbed! That was easy!!

Jul 30, 2008 | 2000 Nissan Maxima

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

Related Topics:

39 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

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

Answer questions

Manuals & User Guides