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-   -   New Battery Installed Lost Radio and Sounds (https://www.chevyhhr.net/forums/problems-service-repairs-42/new-battery-installed-lost-radio-sounds-57968/)

firemangeorge Aug 10, 2019 07:55 AM

If it helps. The "A" in the triangle, gets it's power straight from the 50 amp maxi fuse by the battery.
If you're having problems with anything else that shares this power to the BCM, then I would look at the maxi fuse.
That's all I've got for now Steve.
https://cimg1.ibsrv.net/gimg/www.che...4c7b2d8487.png

Oldblue Aug 10, 2019 09:56 AM

I have pulled and tested that maxi fuse it has continuity.
Fuse #23 is fine , it also feeds the RCDLR, the remote locks work.
I just finished the fuse box halves clean, nothing burnt loose or otherwise, tested all BCM fuses.
Hmmmmm!

RJ_RS_SS_350 Aug 10, 2019 10:04 AM


Originally Posted by firemangeorge (Post 870946)
If it helps. The "A" in the triangle, gets it's power straight from the 50 amp maxi fuse by the battery.
If you're having problems with anything else that shares this power to the BCM, then I would look at the maxi fuse.
That's all I've got for now Steve.
https://cimg1.ibsrv.net/gimg/www.che...4c7b2d8487.png

Looks like the maxi-fuse only powers windows and sunroof through the RAP. Not radio, I think donbrew has mentioned this before.

Oldblue Aug 10, 2019 10:23 AM

Just sifting through the inter webs , there’s mention of this problem, but no solution.
Most sites switch to theft lock codes and I would think that would not be my trouble .
Blizzard stated in one thread he had that problem and it cleared itself after a few days .
As I said , I don’t want to throw down cash as this one is for sale .

firemangeorge Aug 10, 2019 10:23 AM

Might want to look again RJ. The radio and RCDLR are hot all the time via the maxi fuse.
Steve has a dead radio. That's why I posted the schematic.
https://cimg5.ibsrv.net/gimg/www.che...b8600fe5d3.png

Oldblue Aug 10, 2019 11:51 AM

The RCDRL is working, it’s just the radio , display is blank, no sounds , nothing.

I just finished going back out in heat, it’s 34 C out .
anyways , I pulled the radio it has power thru the red and white wire #1 pin.
I do not see any broken or loose ground wires , I ensured the #32 relay is seated , something is is the problem but what is that something?

RJ_RS_SS_350 Aug 10, 2019 11:54 AM

Yep, I missed that part, thanks FMG!

donbrew Aug 10, 2019 12:50 PM

The darkgreen/wht wire is the digital line from the BCM. I don't know how to test it; it might be as simple as ground.

Maybe try a key relearn? Some people say they have seen that advice.

firemangeorge Aug 10, 2019 02:26 PM

Please don't let it be a simple "I forgot to push the big knob in the middle to turn it on" :wink:

On a side note. Installed a new radio in my Dodge truck several years ago. One of those aftermarket ones with the detachable face plate. 6 months later got in the truck leaving Walmart and the radio was dead: no display or sound. Stopped on the way home and checked fuses. Nothing.
Decided to check it the next day and it was working. Weird. Couple months later same thing. Dead again. This time I checked all the wires, fuses etc. Was about to give up when I noticed something putting the radio back in the dash. The detachable face plate was a "little' loose. Popped it off via the detach button, snapped it back on and Viola !, everything back to working again.
Funny thing is it will do this again every once in a while. May go 6 months or longer then the same thing with the same simple fix. My theory is slamming those big Dodge doors eventually pops the face plate loose somehow.

Anyhow. Figure it out Steve. Maybe get your buddy Dan involved if wiring is something he does.

donbrew Aug 10, 2019 04:28 PM

Good point, I never turned mine off so never thought about turning it on. But Sweetie said no blinker sounds.


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