Voltage does not stay the same?

325

Asked by Mar 28, 2017 at 08:59 PM about the 2003 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

I noticed to today that my voltage gauge keeps
moving around alot, it bounces around from 14 to
15 volts and sitting parked it will have around 12 or
13, I suspect it's the alternator but im not for sure.
Is there anything else that could cause this?

2 Answers

5

Change your altenator.

1,245

The alternator has a built in voltage regulator. You should check the system with a voltage meter to verify the gage on the dash is correct. With the external voltage meter connect at the battery, start the engine and check the voltage. Before starting the engine, it should read about 12 volts. After starting the engine, it should increase to about 14 volts. You can also turn on the headlights and blower to see if the voltage remains above 13 or so with everything electric turned on. If the voltage jumps around on the voltage meter, you likely have an bad voltage regulator. Replacing the alternator should correct the problem. Also check the battery connections to make sure they are not corroded.

Your Answer

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,140
  • #2
    Tom Demyan
    Reputation
    1,910
  • #3
    thejeepdoctor
    Reputation
    1,850
View All

Related Models For Sale

Used Dodge Durango
259 Great Deals out of 22,528 listings starting at $895
Used Ford Explorer
912 Great Deals out of 67,921 listings starting at $1,495
Used Toyota 4Runner
275 Great Deals out of 22,870 listings starting at $2,300
Used Jeep Wrangler
341 Great Deals out of 17,187 listings starting at $2,999
Used Chevrolet Tahoe
717 Great Deals out of 41,409 listings starting at $1,995
Used Ford F-150
2,559 Great Deals out of 195,338 listings starting at $1,300
Used Chevrolet Silverado 1500
2,256 Great Deals out of 168,224 listings starting at $1,000
Used BMW X5
368 Great Deals out of 13,334 listings starting at $2,500
Used Honda Accord
1,022 Great Deals out of 57,887 listings starting at $1,099
Used Ford Mustang
585 Great Deals out of 36,206 listings starting at $1,200

Used Cars For Sale

2018 Jeep Grand Cherokee Laredo 4WD For Sale
5,186 listings starting at $27,490
2017 Jeep Grand Cherokee Laredo 4WD For Sale
9 Great Deals out of 1,632 listings starting at $22,284
2016 Jeep Grand Cherokee Laredo 4WD For Sale
567 listings starting at $28,500
2015 Jeep Grand Cherokee Laredo 4WD For Sale
20 Great Deals out of 889 listings starting at $16,365
2014 Jeep Grand Cherokee Laredo 4WD For Sale
12 Great Deals out of 796 listings starting at $13,422

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.