Originally Posted by K1050
Actually felt no dragging and no lock up of the brakes. The battery was not hooked up during the drive. We think it may have happened at the campsite since there was a big dip in the site. The cable was not damaged so it could not have been dragging on the drive.
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So, just to be clear - there are multiple things at play here.
1) the breakaway switch is for the brakes and is supposed to activate them if the camper comes separate from the tow vehicle
2) the battery for the camper. It'll have battery cables - 1 going to the positive and negative terminals. This gives you power when you're not connected to campground (or home) electric (and not plugged into your truck). This also energizes the brakes when the breakaway cable gets pulled. This should energize the brakes even if your 7-pin connector is disconnected.
3) your 7-pin connector (aka umbilical cord) connects your tow vehicle to the camper. The controls the turn signals, sometimes gives a charge to the battery as you drive, and tells the brakes when you press on the in the truck. It's wholly unused in a breakaway situation.
From reading your post, it sounds like 1 and 3 were disconnected. Is this correct? What is the state of #2?
If #2 was still connected, you're going to want to find out why the brakes didn't lock up. The whole purpose of #1 is if the camper separates from the tow vehicle is to apply its brakes to stop the trailer ASAP.