I just changed my alternator and battery now i have no power in my H3 Hummer. I can even get it to go out of park and my key is stuck in it.

Asked by Mar 17, 2017 at 12:39 PM about the 2006 Hummer H3 4dr SUV 4WD

Question type: Maintenance & Repair

4 Answers

76,905

Did you clean and tighten the battery connections? Did you accidentally reverse polarity?

26,605

Check all the battery connections and harness to alternator, then check you didn't blow a mega fuse or fusible link, if you have a multimeter, check of continuity or opens along the charging circuit. In the meantime you can mechanically release the park shifter so you can release your keys. Check your owner's manual for a how-to.

How do i check the mega fuse? I don't know what fuse that is. As far as checking continuity, i dont know much about that or how to go about it.

26,605

Look in your power distribution box under the hood, a fuse tester or a meter set to ohms can check it. Check "continuity" by setting meter to ohms, you want to see zero ohms or near to it, it means the wire is still intact. An "open" means you have a break in the wire (ohms will read "infinity"). The fusible link goes from the alternator to the junction box (by the PS pump), it tends to get very hot, if it 'opens' then you get no power.

Your Answer

H3

Looking for a Used H3 in your area?

CarGurus has 34 nationwide H3 listings and the tools to find you a great deal.

Postal Code:

Hummer H3 Experts

  • #1
    cocod
    Reputation
    820
  • #2
    HummerGirl
    Reputation
    800
  • #3
    PatriciaDoss
    Reputation
    630
View All

Related Models For Sale

Used Hummer H2
31 listings
Used Jeep Wrangler
111 Great Deals out of 1,605 listings starting at $3,995
Used Ford F-150
489 Great Deals out of 10,137 listings starting at $3,450
Used Jeep Wrangler Unlimited
50 Great Deals out of 2,630 listings starting at $9,175
Used Chevrolet Tahoe
6 Great Deals out of 721 listings starting at $4,995
Used Chevrolet Silverado 1500
185 Great Deals out of 11,082 listings starting at $999
Used Toyota FJ Cruiser
81 listings starting at $12,499
Used Jeep Grand Cherokee
100 Great Deals out of 2,793 listings starting at $1,500
Used Toyota 4Runner
6 Great Deals out of 474 listings starting at $5,990
Used Cadillac Escalade
4 Great Deals out of 438 listings starting at $4,000
Used Toyota Tacoma
41 Great Deals out of 884 listings starting at $5,990

Used Cars For Sale

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.