Question about Keystone 2008 Big Sky 340RLQ

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Location of converter

Have no 12v power inside of cabin unable to locate the converter

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The converter is incorporated with the fuse/breaker box. Remove the cover of the breaker box and the converter should be in the lower portion. You will have a small gauge black, white and green wire that will be routed into the breaker (110vac) side and two heavy gauge wires; red and white, that will be routed into the fuse panel (12vdc) side. Once disconnected there should be one or two small screws holding the converter in place. Remove them and slide the converter out.

Posted on Jul 24, 2014


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Your trailer has two electrical systems, 12v and 120v. The 12v system has a battery and perhaps a converter/charger to power it. The 120v system must he hooked up to 'shore power.' Both systems have their own protection. The 12v system has a fuse panel, check for power at each fuse. 12v wall switches are often smaller and don't look like typical 120v switches like in a house.

The 120v system has a breaker box and circuit breakers. Reset each breaker by turning off then on again. In addition, the 120v outlets might have a GCFI outlet near a sink. It often is wired first in a breaker circuit, thus giving GCFI protection to other outlets in the circuit. Test the GCFI and make sure it clicks off and can be reset.

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Where is the 12v converter located?

The converter is located in the power center. The power center is where your breakers and fuses are.

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Do you have 12v when plugged in or on generator? If you do, then it's likely 1) a fuse or breaker for the converter, or 2) the converter is dead. Is your battery good? Try using taking the battery out and using to crank your car or truck. If that works, look at the fuse or breaker for your converter or your converter may be dead. If the batter doesn't work, do the opposite and put your car/truck battery in your RV and see if your 12v works -- if it doesn't, then check your converter fuse/breaker or it may be dead; if it does, then your battery is terminally (pun) dead.

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You are probably hearing the cooling fan cycling. The fan is controlled by the temperature which is controlled by the amp draw which produces heat. If you are using your refrigerator, water heater, AC and lights then you are drawing a heavy load on the converter. I know that the water heater, AC and refrigerator may use 100 electricity but they also require 12v power to run the circuit boards.

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Why am i getting power loss in my rv

12v or 110v? If you are losing 12v power but 110v is staying steady then your converter may be failing. If it is 110v power loss I will need more of a detailed description of what is taking place. What conditions are present and what is occurring when you lose power?

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Interior lights cycle from bright to dim and back

Most likely:
If it is a regular rhythm, look at your converter. The converter changes 120vac to 12vdc. Your interior light are 12v. A failing converter will cycle like that. Probably in the diode array and not servicable. I recommend one of the multi-stage converters. More $$$ but worth it. An alternator (on the engine) can do the same thing if the engine was running.

If irregular, it is varying loads on the power feed. Not much you can do about it except change where you hook up.

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