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2003 Jeep Wrangler check gauge engine light

Tiny
WANDASJEEP
  • MEMBER
  • 2003 JEEP WRANGLER
  • 6 CYL
  • 4WD
  • MANUAL
  • 233,321 MILES
For the past 3 months the check engine light comes on. Replaced the gas cap, relay switch, heater wiring housing under the dash, all fuses are new. Replaced the battery and I was told the alternator is working fine. When I accelerate past 30mp the check gauges light comes on and the battery decreases between 12 -9 amp. The battery before this stayed at 14amp. Before I go and replace any more parts can someone please give me an idea of where to look next. I have seen postings of it possibly being the computer as the problem or simply the person doing the alternator test was unqualified. Any suggestions?
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Wednesday, December 17th, 2014 AT 3:51 AM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,749 POSTS
What trouble codes are coming up when you scan the computer? As far as the alt, it could be a faulty regulator, loose belt. Loose wire.
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Wednesday, December 17th, 2014 AT 5:29 AM
Tiny
WANDASJEEP
  • MEMBER
  • 4 POSTS
All wires seem to be attached properly. Code that comes up is p1682.
WHen you turn off the jeep code clears battery is fine. Once it accelerates above 2rpm and over 30 mph gauge light is back on. All other gauges are fine and work properly.
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Wednesday, December 17th, 2014 AT 10:36 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,749 POSTS
Remove the alt and have it bench tested.
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Wednesday, December 17th, 2014 AT 10:59 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
ALL RIGHTY THEN

NO CJs TORE UP TODAY!

HAD TO JUMP IN SOMEWHERE AND ATTEMPT TO HELP

MAYBE EVEN GIVE A CHRISTMAS PRESENT TO A JEEP GAL

IF YOU ARE TOLD YOUR ALTERNATOR IS SCREWED AFTER ITS BEEN BENCH TESTED

LET'S NOT DO WHAT THEY CALL

"IMPULSIVE BUYING"

YET!

LET'S THINK ABOUT IT A FEW MINUTES

IF YOU GOT ONE OF THEM "SUPER PHONES" (MUCH DIFFERENT THAN MY FIVE YEAR OLD FLIP PHONE/ WITH THE "STILL UNBROKEN SCREEN")

IF THIS PARTICULAR STORE IS AVAILABLE TO YOU, YOU CAN DO THIS IN THE PARKING LOT!

AIN'T NUTHIN' WRONG WITH A "REMANUFACTURED" ALTERNATOR, I BELIEVE THIS ONE HAS A LIFETIME WARRANTY

http://shop.advanceautoparts.com/p/toughone-alternator-remanufactured-117-amps-12334/19850503-P?navigationPath=L1*14920%7CL2*14999%7CL3*15587

IF THIS STORE AIN'T IN YOUR AREA

THIS SORTA SYSTEM MAY WORK FOR A DIFFERENT AUTO PARTS STORE. SEE MY LINK BELOW

https://www.2carpros.com/questions/2001-dodge-neon-milage-just-want-put-fliuds-their-locations

EVEN THOUGH MY LINK IS NEARLY A YEAR OLD

"A124" PROMO CODE JUST WORKED AGAIN (JUST LIKE IT HAS BEEN FOR THE LAST YEAR) WHEN I DID A "TEST RUN" USING YOUR ALTERNATOR

I , MY FRIENDS, MANY ON HERE HAVE SAVED MEGA BUCKS ON PARTS, BY DOING THIS

SO BASICALLY, AFTER YOU TURN YOUR CORE BACK IN, YOU WILL HAVE KEPT $40 IN YOUR POCKET.......I'LL LET YOU KNOW WHAT I WANT FOR CHRISTMAS!

RETURN HERE WITH GOOD NEWS!

THE MEDIC

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Wednesday, December 17th, 2014 AT 5:02 PM
Tiny
WANDASJEEP
  • MEMBER
  • 4 POSTS
So now my baby has a new battery, alternator, new battery wires,
Harness cable, reattached all wires and tightened the wires to make sure nothing is moving around. Now the check engine light comes on, check gauges light, battery is fluctuating between 11-14.
So I replaced everything the manual says possible and still can't clear this code or rather codes. Not a jeep mechanic but I know how to read manual. Is there something I'm missing?
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Friday, December 19th, 2014 AT 2:48 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
THE NEXT THING TO ATTACK IS THE CHECK ENGINE LIGHT

TAKE THAT PUPPY TO A POPULAR AUTO PARTS STORE

NORMALLY, THEY WILL CHECK YOUR CODES FOR FREE!

HERE'S THE DEAL ON THAT

TAKE PAPER AND PEN AND WRITE DOWN THE EXACT CODE NUMBER(S)

MAKE BELIEVE EXAMPLE "P0201" (OR MORE IF YOU HAVE MULTIPLE CODES)

THE AUTO FELLER MAY OFFER "WHAT THEY MEAN" OR A PART "YOU MIGHT NEED" OR NOT (TAKE IT ALL IN-BUT "WE NEED THE NUMBERS!") CODES MAY BE INTERPRETED IN MORE THAN ONE WAY

RETURN HERE, ONE OF US WILL CHECK 'EM OUT

AS FAR AS VOLTMETER FLUCTUATION, HOW FAST, AT WHAT TIMES, IS IT CONSTANTLY MOVING OR AT INTERVALS?

THE MEDIC
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Friday, December 19th, 2014 AT 7:08 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I KNOW

I KNOW

MAYBE THE CODE YOU GET NOW IS DIFFERENT?

THE MEDIC
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Friday, December 19th, 2014 AT 7:10 PM
Tiny
WANDASJEEP
  • MEMBER
  • 4 POSTS
It turns out the wire attached to the alternator needs to be examined. Before buying an alternator or battery anyone with this code should take the attachment wire and examine inside. Magnifying glasses are the best tool to use. The plugs interior is white and so is corrosion so it will be hard to see with the naked eye. Use a fine bristle brush and get out as much corrosion as possible then use forced air to push out the rest. Clear the code from the jeep and see if that fixes it. Surprisingly it did the job. (FYI this was a two person job and the help was much appreciated) thanks everyone for the advice. This is one item not mentioned in the jeep manual. Maybe it will help someone else with the se issue.
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Sunday, December 21st, 2014 AT 9:02 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
WONDERFUL THAT YOU GOT IT FIGGERED OUT!

PEOPLE DO READ THE FORUMS AND DO SEARCHES FOR SIMILAR ISSUES TO THEIRS, INSTEAD OF SUBMITTING A QUESTION

YOUR INFO IS SURE TO AID ANOTHER!

THE MEDIC
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Sunday, December 21st, 2014 AT 5:44 PM

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