Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Ignition fuse keeps blowing

Thread Tools
 
Search this Thread
 
Old Mar 15, 2024 | 01:21 PM
  #1  
Fayesstarr's Avatar
Thread Starter
|
Junior Member
Joined: Mar 2024
Posts: 2
From: Louisiana
Default Ignition fuse keeps blowing

Hello! I have a 2007 H3 that will not crank. It was absolutely fine until one morning while waiting for the windshield to defrost and the engine just died. After some initial looking, the drain hose for the sunroof had popped off due to a (previous owner's) foreign object, and was dribbling all over the electrical stuff under the steering column. We've reattached the drain hose and dried her out but every time we have tried to crank her, the ignition fuse blows.

My questions are two-fold:
1) What is the name of the part(s) I need to replace?
2) Where do I find said part(s)?

Any suggestions will be appreciated! Also, if y'all think that I'm not on the right track with the fix, I'd appreciate any wisdom you could impart.
 
Old Mar 15, 2024 | 02:08 PM
  #2  
Doc Olds's Avatar
Super Moderator
Joined: Jul 2007
Posts: 13,090
From: Boat Town USA MI
Default

Welcome to HF.

Might want to have it scanned and post any code(s). Just because your truck has a short does not mean it need parts, and you would have to have a diagnosis of cause before buying any.

Since we do not know how you dried it off or what stuff got wet your question would be difficult to answer. Which fuse: #33? Auto or Manual Trans?

The I5 engine's ignition coil packs do not have any loom covering/protecting them at the end near the coil packs. I5s vibrate and one of those wires (or more) may have been rubbing on the valve cover which is aluminum and conducts electricity setting up the perfect opportunity for a short to ground. Never happened to my 07, but it did to others.

You need to remove the Intake Resonator Box and inspect the wiring to the coil packs and see if you find compromise to one or more. If the insulation wore through, then tape and protect from contact with the valve cover.

If not there, then look at all the wiring under the dash where it got wet for frayed/torn insulation and correct, the water may have gotten inside a wire itself then cause a short to another.

Report back what you find.
 
Old Mar 16, 2024 | 06:10 PM
  #3  
Fayesstarr's Avatar
Thread Starter
|
Junior Member
Joined: Mar 2024
Posts: 2
From: Louisiana
Default

Thank you so much! I'll do these things in order and let you know what I find.

Oh, and yes it's the IGN fuse, but I have forgotten the number and it's raining lol.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
flashinq
Hummer H2
3
Jan 31, 2023 07:29 PM
Tab Tucker
Hummer H2
3
Sep 9, 2020 03:57 AM
lingsoni
Hummer H3
6
Sep 17, 2019 06:39 AM
chevin
Hummer H3
2
Sep 6, 2018 01:56 AM
kaxtos
PRIVATE For Sale / Trade Classifieds
5
Jan 2, 2016 03:17 PM




All times are GMT -5. The time now is 11:17 PM.