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Elec. hooked up. new battery. lights will go very dim. compressor on a/c stops working but fan still blows. can turn off a/c and converter breakers and lights come back bright. if I leave for a few days when I come back the battery is almost dead to the lights and can reset breakers and lights come back on and battery starts recharging. what's going on? JImmy

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  • Dennis Reynolds Mar 07, 2016

    I think your

  • Rigger DeBusk Nov 14, 2017

    Brother Jimmy, check that no neutral wire (white) is hooked to the ground buss bar. Sounds like could be the backfeed.

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There is a sort some were and it will need to be rectified before it over heats or catches fire.check wiring without the battery on with a meter. turn every thing off and test lines then turn one thing on test then turn on something else keep doing this on all electrical equipment till you find the unit at fault.

Posted on Sep 24, 2013

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As a safety measure, I would do (or have done) a "hot skin" test. If one of your 120vac wires is shorted to the chassis, all metal will be charged with line current. Very dangerous.

Simple to do. Get a digital VOM and a 20' (or longer) 12ga wire with alligator clips on both ends. Check the polarity of your shore power with a $5 tester from Wal-Mart, Lowes, Home Depot, etc. Do this INSIDE and OUTSIDE, Try several outlets inside. If okay, proceed to next step.

Connect the 12ga wire to any earth ground. i.e. a copper pipe in your house, outside water meter, etc. Run the other end to the RV. Set VOM on 200vac and clip one end of VOM on the 12ga wire. Touch the other end to to various metal on the outside of the RV, like the step, frame, trailer hitch.

You may read a small voltage, like 1 or 2 volts. This is residual voltage and is okay. ANYTHING more than that and you have a shorted hot wire in the system.

I repeat: THIS IS EXTREMELY DANGEROUS. GET IT FIXED ASAP.

Posted on Dec 02, 2014

  • Dudley McFadden Feb 28, 2015

    I agree with confirming the polarity and grounding; assume nothing.

  • Dennis Reynolds Mar 07, 2016

    If there was voltage on the frame our skin of the camper, MOST likely he would have already gotten shocked when he opened the door. Unless the ground was bone dry for days. This would not cause his problems even if it was "hot" on the skin. As a certified RV tech, I work on campers all the time.

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My friend,sounds to me like your wiring is crossed,most likely in the breaker box connections.Open the breaker box and see if there is even ONE white wire going to the ground buss.If so,remove it or clip it off.Check this out and get back to me.I've a real neat trick for when RV is sitting for a log while and not in use.

Posted on Oct 22, 2013

  • Rigger DeBusk Mar 07, 2016

    What I said previously about the white (common) wire being connected to the ground buss was why my old '75 Midas kept doing that. Newer systems you plug the old stuff into are set up this way and it works, BUT when you're plugged into an earlier system, it will cause a short. Just clip the white wire from the ground buss of it is connected. Mine just happened to go up to the light and hood vent over stove that I had removed anyway. You can rewire it to the old way if needed. It's only 12 volt, easy to rewire.

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Contact your local retailer directly or online here: HOW CAN WE HELP YOU

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It sounds like when compressor shuts off shorting and feeding back through neutral and shorting out ac power try with air unit breaker off

Posted on Nov 14, 2017

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Make sure you have the right voltage at the "pole". It should either be 30A or 50A plug. The outlet must be wired correctly ! 30A is not a 220 plug ! Check the source FIRST, then check the AC unit for wiring issues.

Posted on Feb 19, 2015

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Agreed, there seems to be a short somewhere. Most likely on the A/C compressor. If you can borrow a clamp-on AC (alternating current) gauge, it will help enormously in finding problems like these. A rarer case with symptoms like yours is that the A/C breaker or the main breaker is old and very weak.
You might also look into a smart charger for the coach batteries.
Lastly, sounds like something that draws high 12vDC current is on whether you're plugged in to shore power or not -- water pump, furnace, fridge, maybe even the inverter itself if it has a short.
Hard to find but easy to fix once found.

Posted on Oct 18, 2014

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U r ovrloading the unit too much activity, that is the reason why ac condensor doesnt work but fan does its giving you the minimum try using one thing at a time before reaking havok thinking your wiring is all messed up could be something simple, step 2 could be that wires are burnt or shorted somewhere, and maybetouching something making them shortdepending on the age of the unit, driving and vibration jiggle the wires to the various different things that came with the rv just wiggle loose just go thru the wiring looking at it wher it visible hopefully it something easy but I would turn one thing onat a time, i bet it the ac unit wiring behind it.

Posted on Mar 07, 2016

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Wiring diagram for a 1988 sunline travel trailer.some of the light switches and outlets have no power going to them.what could be the problem?


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120-
VOLT
AC
SYSTEM
The following electrical components (if so equipped) will only operate when your
RV is connected to shore power: 120 to
12-volt power converter, air conditioner,
120-volt refrigerator, microwave oven, television(s), fireplace and appliances
plugged into convenience receptacles.

SECTION 6 - ELECTRICAL SYSTEM JAYCO TOWABLE
6-2
120-
VOLT
CIRCUIT
BREAKERS
The 120-volt AC circuit breakers located in
side the main load center protect all
120-volt wiring and components in the RV fr
om circuit overloads and short circuits.
Should a circuit overload or short circui
t occur the circuit breaker protecting the
affected circuit will "trip" preventing the flow of electricity through that circuit.
If a circuit breaker trips, shut "off"
the appliance on that circuit (i.e., power
converter etc.) and allow the circuit breaker to cool down for a brief period of time.
After the cooling down period, reset the circuit breaker by moving its lever "off" and
then back to the "on" position. If the circuit breaker re-trips or frequently trips,
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are wearable parts and must be replaced
as needed, as part of your RV
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Please contact your dealer for repair assistance when replacing circuit breakers.
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when the shore power cord is connected to an external power source.
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