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Old 08-13-2018, 02:59 PM   #1
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Radio Help

Not sure where to post this but hope I can get some help here.

2006 Holiday Rambler gasser Admiral SE. It is a 30 footer but length should not factor in. I had to replace house batteries and goofed up and wired reversed polarity. Corrected the problem and everything works fine except the magnadyne 9900 cds radio.

Used to run off house battery by pushing a rocker switch labeled RADIO on dash. Does not work now. Thought I must have "blown" radio BUT removed and benched test at home and all works well. Reinstalled in dash and still does not work.

Pulled every 12v fuse in bedroom cabinet and all tested fine.

I don't know what else could be feeding this radio and from where. Pulled the rocker switch and there are 6 (or 8) all white wires.

Any idea where any other fuse could be feeding the radio or radio switch?
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Old 08-13-2018, 03:53 PM   #2
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Dash radios are usually not powered through the house 12 volt system, but It might be powered from the house to keep from running the chassis battery down. Trace the wire from the switch and I believe you will find a inline fuse. If not, The fuse is most likely in the fuse panel for the chassis. That panel is usually on the firewall in front of the drivers left leg or under the dash.
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Old 08-13-2018, 04:00 PM   #3
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I don't know about the gassers, but Monaco use to put all the 12 volt fuses for the chassis in an outside bay under the driver's window, called the run bay.

Monaco occasionally powered two items off of one fuse, but labeled the fuse under the other item. For example, the radio and dash fans could run off the same fuse, yet Monaco labeled that fuse dash fan. Consequently, you often have to test each fuse with a meter to make sure its still good.

I like keeping one of these handy for testing fuses of all sizes. You can buy them at Walmart in the automotive section. You just touch the pointers to the fuse and it lights up if good.

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Old 08-14-2018, 05:52 AM   #4
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check the back of the radio head unit for a fuse.
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Old 08-14-2018, 06:45 AM   #5
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In mine it is in the power cord bay. It is behind a black panel that is attached with velcro
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Old 08-15-2018, 09:32 AM   #6
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Radio Help - Solved

Well I resolved the issue. After testing all 50?? fuses I can find, I finally opened the large (15" x 15") black mystery panel in the storage bay under drivers seat.

Yep, another 77 fuses but these were marked properly and the second fuse pulled was indeed bad. Replaced with spare fuses I carry and voila ... radio works fine. So I presume this panel is HR's and all these fuses, buses and relays are for the house batteries.

Thanks for all the suggestions and help.

Oh and definitely I will pickup one of those testers from Walmart. Will make the next time (gulp) easier.
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