XM not working

[therick04pp]

Hi all. 08 H3 Alpha... Quick rundown.

Stock XM/CD radio. XM worked one day, did not the next. Fuse under the hood coming off battery is good and both sides show power with a test light. This fuse blew once a few years ago and I lost XM and rear view camera/Onstar (rear view camera still works as does Onstar this time though). Not sure what else to check. Stereo FM/AM and CD work fine, but will not go into XM mode, just cycles from FM 1 Fm2 AM1, back to FM1.

Any ideas? I removed the stereo, unplugged everything, plugged it back in, unhooked the battery for a few hours, unplugged/replugged the XM module above the glove box. Nothing has worked so far. I am all ears!

 

[alrock]

I think the simple answer is the most likely - the XM unit is probably dead. Not that I've heard of this happening before, but simply because your head unit isn't switching to XM right now. I assume no other modules are plugged in, are they? Like an aux adapter?

 

[therick04pp]

Negative, nothing else plugged in. I decided to get a new module and see if that solves it, but I think I need a new one vs, used? Not sure on that. Best part is on Wed., I picked up my daughter from school (last day) and while sitting in traffic... BAM, all dash lights came on, Low Power Mode, traction fail, vibration and 15 mph max speed. Error code when i checked with scanner (that I literally keep in the door pocket because the engine light comes on once a month with a new issue) said error "7&" or something with "Manufacturer component" listed.. Hahaha.I was able to drive it to a side street. Babying the gas I got it up to 30mph and drove it right into my mechanics place.

It has been in the shop since I paid it off, every other month. BCM, Radiator, two alternators, AC ($1,800 fix), balljoints/tierod ends, wheel hub (including front driver driveshaft needing to be torched in half to remove), brakes, ujoints, hood latch, TBS, fuel vent solonoid, O2 sensors... It just never ends. I pray someone lights it on fire. I used to love this thing, now, I wish someone would steal it and they find it burnt to a crisp in a field. Haha.

EDIT* Mechanic called. Half the ignition is working, the other half shutdown.. Lol. He thinks its my remote starter, I told him to rip the damn thing out. We'll see.

 

[alrock]

Aftermarket remote starters are evil. They nearly always seem to fail, leading to weird and inconvenient problems.

 

[therick04pp]

Aftermarket remote starters are evil. They nearly always seem to fail, leading to weird and inconvenient problems.

Agreed. I hate them. Haha. It sure didn't fix it either. Apparently it's the entire fuse/relay box and I need a new one. I guess it makes sense since I obviously disturbed it while messing around and must have been the last straw for it. He also said it happens with the silvarados that use the same fuse box. Fix sounds simple, but nobody has any. Said it could be weeks to months, no stock. I called a stealership friend of mine who works in parts and said he found one in Rhode Island and it's the only one in the dealer network in the country, that he can see.. I snagged it. Online (although out of stock) they are $240-ish, my price from him was $325 plus freight. This may be the final fix before I ship it down the road. It breaks so much, I can NOT be fighting to find parts before something goes that they have no parts for.

Hopefully** this fixes it.

 

[therick04pp]

6/30/21 Update.

Fuse box replacement didn't work. My mechanic was working on tracing all the circuits when the Matco guy shows up. Shows them a new diagnostic tool he has and wound up lending it to them to demo.. It determined it was a harness UNDER the fuse/relay box that was corroded. Fixed it up and put her back together and voila. All good. Only cost me $210 in labor and about two weeks of not having a vehicle.

Best part.. that damn XM still doesnt work.. HAHAHA. :gaah: