Master switch

RCREYES

RCREYES

Senior Member
Joined
Mar 22, 2010
Messages
1,370
Location
Far West Texas
What position does the master switch go in when the trailer is not in use? My battery is going dead when I leave it down or in the middle.
 
The middle is the "all things off" position. The refrigerator in 12 volt mode is the only exception. If you have a tongue jack it doesn't go through the master switch.
 
I believe somebody said that the stereo system bypassed the switch because it needs power to maintain the program settings. That should be a very small draw. You may have something else wrong. If you have an ammeter, put it in series between the battery positive post and the disconnected battery wire and see if there is any current flowing. If so and the master switch is on the center position start hunting for the gremlin.
 
RichR said:
I believe somebody said that the stereo system bypassed the switch because it needs power to maintain the program settings. That should be a very small draw. You may have something else wrong. If you have an ammeter, put it in series between the battery positive post and the disconnected battery wire and see if there is any current flowing. If so and the master switch is on the center position start hunting for the gremlin.
Click to expand...

Yes, I've posted on this and installed a simple ON-OFF switch in the positive electrical supply to the radio/TV/DVD player. I suspect you have something similar in your trailer. The player was completely isolated from the 3-position switch, so the switch had no effect. The battery would be drained within about 2 weeks if it was not disconnected, which is what I did before I found the source of the problem.

Having the ON-OFF switch has caused no problems. Radio presets don't mean much when you are traveling, and it has not caused any problems with the DVD, which is really all we use, to play DVDs and CDs.

- Jack
 
JIM L said:
Could the carbon monoxide alarm also be hot wired so is a small constant current drain? I Haven't tested mine to see if always on.
Click to expand...

My carbon monoxide/smoke alarm is double A battery powered unit, my 12 volt propane gas alarm was wired incorrecting from the factory causing a battery drain. I ran a new 12 volt supply line from the 12 volt fuse box with a 3amp fuse to the propane gas alarm. With my switch in the center prosition there is no draw and the alarm is off. With the switch in the battery prosition I get 12 volts to the fuse box and then to the alam. If I'm pluged into shore power, my converter sends 12 volts to the fuse box and then to the alarm.
 
RichR said:
I believe somebody said that the stereo system bypassed the switch because it needs power to maintain the program settings. That should be a very small draw. You may have something else wrong. If you have an ammeter, put it in series between the battery positive post and the disconnected battery wire and see if there is any current flowing. If so and the master switch is on the center position start hunting for the gremlin.
Click to expand...
I better hunt for the gremlin since I do not have a stereo system.
 
The only two items I could think of robbing the power is the fridge fan and the break away brake switch. Both are unlikely sources, but possible. Don't know if you have installed a new fridge fan and rewired it or left the switch on. And again if the break away brake switch was the problem, your brakes would be on when you would hook up to tow - but if the battery was drained, there would be no juice from the battery to apply the brakes. Hope this makes sense.

Bob
 
The breakaway switch would kill your battery very quickly. The propane alarm would be a slow drain. You could certainly tell if the alarm or the fridge fan was on (you'd hear the fan or feel a breeze, and the propane alarm has a light that blinks about once every 15 or 30 seconds when it's on).

- Jack
 
Jack,

If the fridge fan is the factory original, you can hear them run from a block away. If they have been replaced by the newer technology fans, you cannot hear them run. I have to literally put my ear on the exterior vent to hear it run. It has a so-called "liquid bearing" by Sony.

Bob
 
Bob - Yep, I know that, having replaced my Mattel fan with two PC fans. But, when I put my ear up to the vent I hear them and certainly feel the air blowing on my head. :) I didn't think RCREYES had replaced his fan, but that's why I suggested he could feel a breeze, if he couldn't hear the fan.

I think the Sushi Mod was one of the best things I did to our trailer!

- Jack
 
JackandJanet said:
Bob - Yep, I know that, having replaced my Mattel fan with two PC fans. But, when I put my ear up to the vent I hear them and certainly feel the air blowing on my head. :) I didn't think RCREYES had replaced his fan, but that's why I suggested he could feel a breeze, if he couldn't hear the fan.

I think the Sushi Mod was one of the best things I did to our trailer!

- Jack
Click to expand...

I haven't replaced my fan. I haven't had time to check it out yet either. I'm taking a four day weekend so I'll be doing some maintenance on my trailer. I'll let you know what I find. :confused:
 
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