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Middy · 05-24-2015, 05:38 AM

Just came into possession of a 1970 Safari. Electrical has been updated it appears. New Coleman AC. Plugged up to my house (20amp) using a regular orange extension cord. Only ran the AC and turned a few light on and off. All was well. A few hours later interior lights not working. AC still runs. Any ideas as to what may have happened? Probably obvious but I'm no sparky.

SteveH · 05-24-2015, 06:03 AM

The lights should be running on 12VDC, and the air conditioner on 120VAC. So you may have a situation where the 12 volt converter (charger) is not working, and the battery has discharged.

Or, you may have a fuse problem on the 12 volt supply.

Middy · 05-24-2015, 06:09 AM

P.S. Just found the fuses in my converter were blown. Not sure why.

xrvr · 05-24-2015, 06:38 AM

Twenty amps may not be enough to power the trailer with Air on. Be careful. Jim

AnnArborBob · 05-24-2015, 07:26 AM

I'm not familiar with the specs for the Coleman AC unit, but I would be surprised if 20 amps (and your extension cord could actually be a 15 amp cord) is sufficient. After you've replaced all the blown fuses, I would try to run the AC when connected to a proper 30 amp power supply. Note that a residential dryer outlet does not have the proper power to run your trailer even though the plug looks compatible. Plugging a RV into a dryer outlet and frying the RV electronics is a tragic newbie mistake. Don't do it! Go to a campground to test this.