Jayco RV Owners Forum

Thread Tools Display Modes
Old 06-24-2018, 06:58 PM   #1
Senior Member
Join Date: Jan 2010
Location: Wisconsin
Posts: 4,428
No 12V in camper or tongue jack

Like the title says. 13.3 volts across battery terminals, same voltage at battery disconnect switch when on, 0 V when off. Tongue jack only works when hooked up via umbilical cord from TT to TV. All works on 120. Is there a fuse or reset I'm missing somewhere?

Issue 2, sometimes tongue jack goes up when pushing down button and down when pushing up button. Sometimes it works fine. Any ideas on this one?

wiscampsin is offline   Reply With Quote
Old 06-24-2018, 07:35 PM   #2
Senior Member
ALJO's Avatar
Join Date: Oct 2014
Location: Sparwood, BC
Posts: 2,206
Send a message via Skype™ to ALJO
Check your ground(s) on the A-frame. If the Power-Jack is not covered water might have entered the switch. You can try contact cleaner.

2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-7000 lbs.
Dexter Axle Lift 4-9/16" - installed with sub-frame.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO is offline   Reply With Quote
Old 06-24-2018, 08:01 PM   #3
Join Date: Mar 2016
Location: Mexico
Posts: 49
This happened to us on our maiden voyage a few years ago in our White Hawk. Found it was a fuse behind the battery box on the tongue. Ours is a green wire with a black weatherproof fuse holder. 30 amp fuse.
We were told it can blow if you lower the tongue jack too much.
Hope that helps!
Tomminny is offline   Reply With Quote
Old 06-24-2018, 09:13 PM   #4
Senior Member
2nOZ's Avatar
Join Date: Oct 2016
Location: South Central KS
Posts: 1,198
Check the 30 amp fuse on the front frame. That’s usually the culprit.
2018 Jayco Eagle HT 28.5 RSTS
2017 Ford F-250 Lariat FX4, 6.2L
2017 White Hawk 27DSRL (traded in)
2nOZ is offline   Reply With Quote
Old 06-25-2018, 05:34 AM   #5
Senior Member
Mustang65's Avatar
Join Date: Nov 2012
Location: Clearwater, FL area
Posts: 4,739
As previously mentioned check the fuse, BUT also check the blade fuse holder as over time it can become corroded. Spray electrical cleaner in it anyway.

Battery connected properly? WHITE cable goes from batteries NEGATIVE cable to the FRAME ground and the BLACK POSITIVE cable goes to the inline fuse.

Make sure your battery terminals are clean and tight, also a tight ground connection on the frame.

My Registry

RVing with SOLAR
2013 Jayco Eagle 284BHS
250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
2 - AirSight Wireless IP Cameras (used as rear view cameras)
EnGenius WI-FI extender, D-Link wireless (n) modem
MagicJack Internet Phone
2012 Ford F150XLT, EcoBoost w/3.73
157" Wheel base, HD Towing Package

Our Solar Album https://www.jaycoowners.com/album.php?albumid=329
Mustang65 is offline   Reply With Quote
Old 06-25-2018, 07:49 AM   #6
Junior Member
Join Date: May 2018
Location: ofallon
Posts: 27
We had the same issue. Our tongue jack has 2 inline fuses. One 30 amp slow blow in the wire leading up to the switch control head and one as previously mentioned connected by the J box on the font of the trailer with the green wires. This one is a standard 30 amp spade fuse.
OCBray is offline   Reply With Quote
Old 06-25-2018, 02:01 PM   #7
Senior Member
Join Date: Jan 2010
Location: Wisconsin
Posts: 4,428
Thanks all! Got 12V back. It was the 30 Amp fuse behind battery box. I didn't even see it at first look.

2004 SOB popup
2006 SOB hybrid
2008 Eagle 314BHDS
2013 SOB 5th wheel
2019 Hummingbird 17RK
wiscampsin is offline   Reply With Quote

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

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 08:21 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.