Mitsubishi Lancer and Lancer Sportback Newer to the United States, the Lancer line offers a sporty compact sedan, with all of the fine styling of the performance minded Evolution.

2002 Lancer - Only Battery light On - Battery & Alternator checks good

  #1  
Old 04-01-2015, 10:53 AM
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Default 2002 Lancer - Only Battery light On - Battery & Alternator checks good

I have a 2002 Lancer with only the battery light on. The brake light is not on. I had the alternator & battery checked at 3 different places and both checks good.

Any idea what would be causing just the battery light to be on ?

Thanks

Waid
 

Last edited by waid302; 04-01-2015 at 12:28 PM.
  #2  
Old 04-01-2015, 12:12 PM
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Originally Posted by waid302 View Post
only the battery light on.

just the alternator light to be on ?
wut. ..
 
  #3  
Old 04-01-2015, 12:29 PM
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Corrected. The battery light is on like this one!


 
  #4  
Old 04-01-2015, 06:47 PM
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At the battery with car off, my multi-meter reads 12.2V. With car on it reads, 15.5V. However, with my Android OBDII Scanner, it reads 14.4V.

Waid
 
  #5  
Old 04-02-2015, 03:16 AM
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i would trust a multimeter over a telephone for diagnosing electrical problems.

15.5 seems high, which points to a regulator issue.

12.2 seems low, which points to an old battery.

if it was reading low and "overcharging" to compensate, this would explain it all.


replace the battery.
 
  #6  
Old 04-02-2015, 07:27 AM
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Thanks Akzle,

I will put another good battery in the car and see if the light goes away. If not will replace the alternator and see.

Thanks

Waid
 
  #7  
Old 04-07-2015, 10:15 AM
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Found the problem! The Orange battery sense wire (Pin 2 on B-25) at the Alternator was broken but still attached to the alternator. I started from the Battery and traced it back to find where it was disconnected. Once I connected it, the light went away and all is well.

What is interesting is I went to 4 different auto parts stores with the Alternator and Battery and got 4 different answers as to what is bad. One AutoZone said the Alternator was bad and other one said it was good and both said the Battery was fine. O'Riley said Battery and Alternator was fine. CarQuest said Battery was bad and Alternator was good. So go figure!

Thanks

 
  #8  
Old 04-07-2015, 01:11 PM
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good job, happy ending and money for beer rather than replacement parts!
 
  #9  
Old 04-07-2015, 01:32 PM
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The Alternator for Lancer here is high $$$. I paid $25 for the used one but my Alternator is still good. I may just keep it as a back up just in case.

Waid
 
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