Thread Tools Display Modes
Old 06-01-2016, 03:06 PM   #11
Senior Member
raspivey's Avatar
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,460
Probably due to the location of the refrigerator, but I never could get mine to stay lit on propane when driving. I'd try that and see if it works. Cools better anyway.

2015 Chevy Silverado LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
raspivey is offline   Reply With Quote
Old 06-01-2016, 03:06 PM   #12
Senior Member
Brother Les's Avatar
Join Date: Jul 2013
Location: BoCoMo
Posts: 2,029
Originally Posted by Canadiancrew View Post
As stated you can check it with a meter. One of my past Gmc's was not wired but my current Ford is and will charge.

But why not run it on propane we did when we had a 3 way in the past. I didn't like the possibility of forgetting to switch over etc. And with such a heavy draw if anything went wrong it would leave you stranded. Maybe I am paranoid but I felt better running on propane.
The 7-point connection 12v power from the truck will shut off (or should) when the truck is turned off.

Brother Les

2013 Forest River Salem Hemisphere SBT312QBUD

2001 CrewCab F-250 7.3 PowerStroke Diesel
SuperChip, BTS transmission, 6.0 Trans Cooler
Brother Les is offline   Reply With Quote
Old 06-01-2016, 03:09 PM   #13
Junior Member
Join Date: Mar 2013
Location: md
Posts: 6
My first trailer was a pop up with a 3 way frig. I tried to run on propane, but the pilot light kept being blown out when it was towed, so I had to run on 12 volt. My tv was just keeping enough power to keep things cool, but as soon as I stopped, the trailer battery was so low, the propane monitor was sounding. Also always switched to propane when we stopped.
riengle is offline   Reply With Quote
Old 06-01-2016, 03:33 PM   #14
Senior Member
Broadway Joe's Avatar
Join Date: Oct 2011
Location: Fort Worth
Posts: 644
Originally Posted by Brother Les View Post
The 7-point connection 12v power from the truck will shut off (or should) when the truck is turned off.
Most GMC products I have encountered do not disconnect on engine shutdown.
2015 Wildwood 27RKSS
2015 Silverado 2500HD Duramax
Broadway Joe is offline   Reply With Quote
Old 06-01-2016, 05:00 PM   #15
Senior Member
Join Date: Mar 2014
Posts: 1,023
Most PUP fridges draw 5-6 amps on 12V DC. The 12V heating coil is typically 60-70 watts fixed with no control. The 120V AC heating coil is 90-120 watts, often with a SCR (household lighting dimmer) control on it.

Because PUP fridges are manual light, continuous run on propane, there is no way for the fridge to relight if the flame gets blown out when towing. And the access door/intake and exhaust vents being large and located close together on the side of the PUP makes flame-outs more likely.

So I always put my fridge in DC mode while towing. The only real issue is whether or not your tow vehicle wiring harness is large enough gauge wire to support both the running lights and the fridge at the same time without much of a voltage drop.

I detailed how to check the camper battery voltage under load to determine whether or not the wiring supports keeping the camper battery charged, the running lights lit, and the fridge on in 12V mode in your thread under pop-up campers.

I don't disconnect the tow vehicle while on the road unless the stop is more than an hour (keep the fridge going on 12V). And I've never had a problem starting.

Fred W
2014 Rockwood A122 A-frame
2008 Hyundai Entourage minivan
2000 Coleman Westlake PUP
1993 Ford Explorer

pgandw is offline   Reply With Quote

battery, trailer

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:05 PM.