Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-21-2024, 08:47 PM   #1
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default CB Issue

All the 12 V CBs on the right side of my panel (lower right - see pic) are dead. I haven’t pulled the panel yet. Anyone experience anything similar? The left side works fine.

Thanks,
Steve
Attached Thumbnails
IMG_4100.jpeg  
__________________

SteveP is offline   Reply With Quote
Old 03-21-2024, 11:27 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,211
Default

More information please. The upper right are AC powered while the lower are DC powered, which are not working?
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 03-21-2024, 11:43 PM   #3
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

Lower right… the 12 volt
SteveP is offline   Reply With Quote
Old 03-22-2024, 04:32 PM   #4
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,211
Default

Quote:
Originally Posted by SteveP View Post
Lower right… the 12 volt
I don’t see the wiring diagram in our library for your model but have to assume the 12V feed is missing. You’ll most likely have to pull the panel. Is there a separate breaker for that side!
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 03-22-2024, 11:39 PM   #5
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

Thanks… doesn’t appear to be a second breaker. Just the master on the panel. I have the diagram from the manual but it really doesn’t show much. As many have mentioned here and on Facebook I’ll pull the panel and have a look. Was hoping someone else with a 4600 had already solved a similar issue.
SteveP is offline   Reply With Quote
Old 04-01-2024, 05:15 PM   #6
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

Turned out to be a corroded ground attachment in the main 12v CB. The other bank of 12v CBs was not going to last too much longer. Two pics are the back of the panel and the two old/new connections. The 12v side is behind the steel panel sticking up. Thankfully all the other 12 and 110 connections looked OK. Now to tackle spring cleaning…
Attached Thumbnails
IMG_4103.jpeg   IMG_4104.jpeg  
SteveP is offline   Reply With Quote
Old 04-01-2024, 10:25 PM   #7
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,211
Default

They’re not corroded but fried. Either they got loose and became resistive connections or too much current was conducted through them.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 04-01-2024, 10:50 PM   #8
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

If you saw the wire you might rethink your statement.

Regardless… it is now working.
SteveP is offline   Reply With Quote
Old 04-01-2024, 11:25 PM   #9
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,211
Default

I doubt it since there is signs of burning on the connectors.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 04-01-2024, 11:44 PM   #10
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

Maybe we are both correct with corrosion causing excess resistance and heat…
SteveP is offline   Reply With Quote
Old 04-01-2024, 11:46 PM   #11
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,211
Default

Quote:
Originally Posted by SteveP View Post
Maybe we are both correct with corrosion causing excess resistance and heat…
That’s possible. I didn’t notice any other corrosion in the area. Main thing is you resolved the issue, enjoy.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 04-02-2024, 07:54 PM   #12
Moderator

 
shrew's Avatar
 
Join Date: Apr 2008
Posts: 5,596
Default

The entire 12v panel is fed by a 10-12 gauge wire?? That seems kind of small. How many 12VDC breakers are on that bus? What devices are drawing from that bus?

Even with a 10 gauge wire I wouldn't expect to pull more than 30amps total, likely much less depending on the distances of the circuits.
shrew is offline   Reply With Quote
Old 04-02-2024, 08:36 PM   #13
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

Not sure of the gauge but the hot feed was twice the size of the 2 ground connections. The panel supports the 2 heads, fridge, sump pump, lights, wash down pump and a few other items… 14-15 total. Other than the ground wire issue the connections seemed OK.
SteveP is offline   Reply With Quote
Old 04-03-2024, 04:12 PM   #14
Moderator

 
shrew's Avatar
 
Join Date: Apr 2008
Posts: 5,596
Default

Quote:
Originally Posted by SteveP View Post
Not sure of the gauge but the hot feed was twice the size of the 2 ground connections. The panel supports the 2 heads, fridge, sump pump, lights, wash down pump and a few other items… 14-15 total. Other than the ground wire issue the connections seemed OK.
TWO Ground wires?? This doesn't make a lot of sense and not how it would have shipped from the factory. This is the ground to the panel?

The ground would need to be same size as the Line In. The circuit is sized for the round trip Battery Positive -> Panel -> -> Battery Ground. If the Line In was 6 gauge, then the ground would be 6 Gauge as well. Not two 12 gauge in parallel.

I suspect this might be why that ground leg of that circuit got hot.
shrew is offline   Reply With Quote
Old 04-03-2024, 04:46 PM   #15
Lieutenant
 
SteveP's Avatar
 
Join Date: Jan 2018
Location: Virginia
Posts: 63
Default

You’re correct. What I had mistakenly called a ground was the continuation of the hot (red) lead out of the main CB. The main is split into 2 leads that each power half of the 12v panel when the CB is on. LOL electrical is not my strength. Just glad it was a simple fix.
__________________

SteveP is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 12:37 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.