Question about Jeep Grand Cherokee
I would need to know what year the Jeep is to comment on the overcharging problem as well as the code 37 problem.
There could be a voltage regulator on the alternator, or it could be built into the engine computer.
Posted on Jul 12, 2013
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
SOURCE: Alternator may be overcharging?
Yes It sounds like the voltage regulator inside the alternator has gone wide open .It can also ruin your battery and explode the battery.I would have it hooked up to a alternator tester and just to make sure it's not just your gauge.hope this helps
Posted on Jan 24, 2009
Most likely it is the voltage regulator that's going bad which allows overcharging. this is inside the alternator, so it most likely needs replacement. you could pull it out and take it in to most auto parts stores and they would check it to make sure.
Posted on Jul 06, 2009
Battery by itself with no cable attach should read 12.4V for low and 13.6V for fully charged.
With both terminal connected a health charging system should read 13.6 to 13.8V
Amp gauge should read positive when chagring and when discharging it should be on the left (negitive side)
Key has to be out of the ign.
Charge battery to the max with terminals off the car.
Test voltage and make sure it's between 12.8 to 13.6V
Check the battery CCA and compare it with a battery load tester.
CCA that read 60% below the sticker is a BAD battery.
Cannect the + terminal.
Carefully touch the negitive terminal to the neg. battery post.
Make sure all doors and light are off
You should get a little spark.
A large spare is equal to a large load.
An amp meter will give you a better idea what the drain is.
A short is hard to find and it will take time.
Work on one fuse at a time until you find the load.
Posted on Jul 17, 2009
With Ign. off what is your batt.voltage reading than take neg. cable off and take another reading 5 min. later. It sounds like a intermitten short, try to isolate voltage drop when acting up. Gauge circuit would be a good start. Schematic would be helpful.
Posted on Sep 02, 2009
Tips for a great answer:
Nov 15, 2015 | 2008 GMC Sierra 1500
Jul 14, 2015 | 2004 Chevrolet TrailBlazer
Feb 01, 2015 | 1998 Jeep Wrangler
Sep 13, 2012 | 2004 GMC Envoy
Feb 01, 2012 | Cars & Trucks
Feb 27, 2011 | Ford Expedition Cars & Trucks
Aug 12, 2009 | 2000 Ford Windstar
Jan 24, 2009 | 1999 Chevrolet Silverado 1500
Jan 08, 2009 | 2000 Ford Escort
187 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: