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Old 06-10-2018, 05:13 PM   #1
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Unhappy Electrical System Malfunction

I have a 2015 Crossroads Aire 5th Wheel (27RL) that the AC/DC converter went out on, I changed the converter and battery, the system appeared to work okay for 2.5 days then the battery was drained and all systems failed. When I started trouble shooting the system I found every 20 amp fuse was blown, I replaced them but found the converter is out again! Going to hook a battery charger to line after a successful trouble shoot before buying new converter!

I removed the battery cables and checked the manual switch, no issues but when I checked the positive line (removing from converter and battery) it indicated there was 15 - 18 ohms?

What in the RV is tied directly to the battery?

I will be removing every line and checking them one by one to see if there is a short so if there are motors or other items in line so if any one has ever experienced this problem before any help would be fantastic.
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Old 06-11-2018, 05:06 PM   #2
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The tongue jack is often connected directly to the battery, as are the electric trailer brakes, after the pull-away switch. One other note. In Crossroads, the battery cables are white for negative, and black for positive. (think like house wiring, not auto battery). A reverse installation can cause blown fuses and more.
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Old 06-12-2018, 01:39 PM   #3
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Red face Found Short

I am having problems with this site:

I did find my problem, which was of my own making!

1. Isolated all positive leads and checked with an ohm meter for continuity and for shorts.
2. Found a ground wire attached to the new converter I had installed that was actually causing a direct short, positive to ground. The ground wire was on my old converter but not on my new one so I had arbitrarily had used a screw on one corner of the circuit board. I didn't check with the ohm meter to see if it was grounded therefor it caused all my problem!

Lesson learned: Don't install a ground wire unless it comes with one and/or you make sure it is not to a positive portion of that unit!
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