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Old 09-11-2013, 08:33 PM   #1
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radio display still illuminated when trailer is on battery

My radio display is still illuminated while on battery. Won't this kill the battery if left this way? Thinking about cutting the power wire and putting in an auxiliary push button switch so I can totally isolate it. Hate to leave it set a month only to find the battery dead. Anyone else's bunkhouse 267 radio hard wired with no way of powering it down?
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Old 09-11-2013, 08:38 PM   #2
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I believe most radios are wired this way in trailers. I put in a switch like you mentioned. But this is not the only phantom draw. The propane/co2/smoke detectors will also draw down a battery in a period of time. Your best bet is to put a quick disconnect on the + battery terminal so all power ceases to flow.
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Old 09-11-2013, 08:43 PM   #3
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Quote:
Originally Posted by Mainenebula View Post
I believe most radios are wired this way in trailers. I put in a switch like you mentioned. But this is not the only phantom draw. The propane/co2/smoke detectors will also draw down a battery in a period of time. Your best bet is to put a quick disconnect on the + battery terminal so all power ceases to flow.
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Old 09-11-2013, 09:57 PM   #4
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I disconnect the battery and put it on my battery tender when not in use...problem solved, and helps prolong battery life.
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Old 09-11-2013, 11:35 PM   #5
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radio display still illuminated when trailer is on battery

Agreed that most trailers are like this.

Either install a cutoff or remove the battery when not in use.

I do the later to prevent battery theft at storage.
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Old 09-12-2013, 08:07 AM   #6
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I did the same here but sort of for a different reason... My JENSEN radio has two 12VDC power connections - One goes to 12VDC through an in-line fuse and the other other connection is suppose to go to the ignition key when used in a car/truck setup. Both of these two connections were wired together to 12VDC in my trailer.

On my setup if I removed all of the 12VDC going to the radio and the ignition lead I would lose all of the presets and everytime I turned it all back on I had to find my favorite station and also do all of the other setup things again I liked to do like fade between inside/outside speakers etc...

To solve this problem I added a RADIO SHACK panel Lever thumb switch and connected this to the IGNITION wire. Now if leave the radio MAIN ON-OFF in the ON position I can operate the extra ON=OFF for the ignition wire (Just like turning on the radio in the car/truck by using the ignition key) and this will keep all of my preset setting. Of course if I ever turn off the radio by the MAIN ON-OFF I kill everything again including presets.



I installed this switch to the right of my JENSEN RADIO shown in this photo.


My trailer setup has a BATTERY SELECTOR and DISCONNECT switch which kills all 12VDC feeding the trailer when I need to do that...


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Old 09-20-2013, 08:06 AM   #7
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My trailer (24FBS) has a 30 amp fuse at the battery box, I just pull the fuse and set it on the
kitchen counter. Since we travel a lot per-sets are not important.
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Old 09-20-2013, 09:50 AM   #8
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I believe that if you have 2 leads for power, 1of the leads connects to the 12vdc to keep only the selected radio station memory alive. If you do not care about storing stations in memory, disconnect it. Less of a battery drain.
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Old 09-20-2013, 11:10 AM   #9
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If you're willing to part with a few $$$, buy a solar battery charger and install it. In the end, this could be a lot simpler than installing switches and you won't lose the settings/time on your radio. Also, if your battery becomes too weak, your propane detector will begin to "chirp" periodically- just like smoke alarms do when their battery needs replaced. Many refrigerators will refuse to start (even on propane) when the battery voltage drops below a certain point and you're not running on shore power.
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Old 09-20-2013, 01:23 PM   #10
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I just pull out the inline fuse that is located near the battery, I suppose not all trailers will have this fuse in this location.
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