H3 Cruise/temp/compass not working

[06 H3]

Cruise and the rearview mirror is not working. It's not V8 swap related because it did work after the swap. Both are controlled by fuse 35. I put in a new fuse and it popped immediately.

I did a search and it seems I'm not the first one to have this issue. Many people in stock unmodified rigs had this issue.

I'm going to try and pull the rearview plug try the new fuse and see if it blows to see if it's cruise or mirror related.

Anyone else already have this issue and fix it?

 

[cbetts]

Think back to when it first happened and what you may have done to cause it. You recently removed your doors for a trip. If those events lined up, look at the door harnesses.

Sent from my XT1254 using Tapatalk

 

[06 H3]

This happened a while ago so memory may not be the most accurate but I remember one day I hopped in turned it on and nothing. Cant remember if I had the doors off weeks prior. I will start diving into it today. Oil change, throttle poisition sensor and the cruise issue.

 

[cbetts]

Did you ever pull out your fuse box? Those funky plugs on the bottom can cause havoc. I bent a pin on mine that took out cruise and mirror. Maybe you have something similar. Also, check the harness between fuse box and firewall. You might have nicked it during your engine swap and it finally got a short later.

 

[06 H3]

thanks! I will check, I know I changed the fuse box soon after the engine swap. Those pins are a PAIN!

 

[4speedfunk]

Yeah. Shorts are easier to troubleshoot than random electrical gremlins. If you are popping a fuse...there's a definite issue somewhere.
When my cruise quit working at 4000 miles (brand new), it turned out to be a faulty brake light switch.

 

[06 H3]

I changed the oil today, cleaned the throttle body and changed out the throttle position sensor. I got a code for that a few months ago but haven't had a chance to change it. 5.3 Silverado guys say it's common that the throttle position sensor go out. Changed it and the CEL is gone! Much more responsive now as well. By the time I finished it was 100 out so I called it quits. I'm going to try and start the cruise control issue tomorrow

 

[alrock]

Should be a fun hunt looking for a frayed wire :gaah:

 

[06 H3]

I'm not convinced it's a frayed wire. The cruise control wire was never touched during the swap. I figure it might be a bent pin under the fuse box (removed the fuse box during the swap) or the one of the clusters went out. (Not sure if a bad cluster will trigger a fuse)

I'm betting on the bent pin. Reloader has said in the past that the fuse box connectors are an absolute pain in the ass and cbetts said he had an issue with a bent pin.

No cruise wire was moved, cut and soldered, relocated, or even messed with so I doubt it's frayed

 

[raetza]

Was this resolved?

I'm not convinced it's a frayed wire. The cruise control wire was never touched during the swap. I figure it might be a bent pin under the fuse box (removed the fuse box during the swap) or the one of the clusters went out. (Not sure if a bad cluster will trigger a fuse)

I'm betting on the bent pin. Reloader has said in the past that the fuse box connectors are an absolute pain in the ass and cbetts said he had an issue with a bent pin.

No cruise wire was moved, cut and soldered, relocated, or even messed with so I doubt it's frayed

Hey, I'm a newcomer to this forum. I got an 07 H3 about a year ago and recently I can't keep the cruise/rearview mirror fuse from blowing. I feel like it's a intermittent short as it will go for days at a time without blowing....but other times will blow within minutes of being replaced. I just wanted to benefit from anything someone else has found regarding this issue if possible.

Thanks