Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Tiffin Motorhomes Owners Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 03-13-2018, 10:25 AM   #1
Senior Member
HR2004's Avatar
Join Date: May 2014
Posts: 460
Unlabled plug

2008 pheaton. Qth
What is this plug and receptical for. It is not the block heater. The heater is a labled cord and plug. Inside the junction box this plug comes from is a relay. ????
There is no power in the receptical. Is there a switch for it?
Thanks for your help
Attached Thumbnails
Click image for larger version

Name:	20180313_091433.jpg
Views:	63
Size:	241.9 KB
ID:	195436  

HR2004 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 03-13-2018, 11:28 AM   #2
Senior Member
Lt Dan's Avatar

Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 1,872
Try turning on the block heater switch on the dash then see if the outlet has power. The block heater outlet is normally controlled by a 12v relay and switch. I know you said it's not the block heater, but give it a try as that is usually a relay controlled outlet.

Dan & Ro with two Rescued Boston "Terrorists" Jade & Jewel
2017 Phaeton 40IH Maroon Coral - Power Glide Chassis with IFS (05/17)
Previously '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'12 Jeep JK Wrangler Sport and/or '08 Honda Goldwing
Lt Dan is offline   Reply With Quote
Old 03-13-2018, 01:38 PM   #3
Senior Member
HR2004's Avatar
Join Date: May 2014
Posts: 460
Thanks. Will check that out after lunch. I'll post what we find out
HR2004 is offline   Reply With Quote
Old 03-14-2018, 09:15 AM   #4
Senior Member
HR2004's Avatar
Join Date: May 2014
Posts: 460
Nope. Not the block heater. It is another outlet and working fine off the dash switch. The relay in the picture is in a clear box and the contacts do not move when heater is activated. So it is working off another relay. Guess he will find out what this other plug and dead receptical are for when he goes to Red Bay. . It is not shown on the factory provided schematics.
HR2004 is offline   Reply With Quote
Old 03-15-2018, 07:28 AM   #5
Senior Member
burfurd's Avatar
Tiffin Owners Club
Freightliner Owners Club
Join Date: Oct 2007
Location: Cookeville, TN
Posts: 518
Suspect anything! The block heater plug and relay was NOT even installed on our Phaeton. The block heater was plugged into another 110 receptacle and was on all the time. The wife kept noticing the floor was warm over the engine. Got to checking and found the problem. Tiffin rep at Lazy Days had to install by running wiring from across to other side of motor home where switch control terminated.

Do not think any two are built the same!

I would suspect that the plug and relay were installed with no wires ran across the frame to wire up the relay to the switch. Your block heater switch may be working including lighted indicator but not be switching the relay due to missing wire.

Are you absolutely certain your block heater is on when you switch it on?

2012 Tiffin Phaeton 36QSH Diesel Pusher, TireTraker TPMS, Safe-T-Plus, BrakeMaster, '08 Honda CRV, Protect-a-Tow
burfurd is offline   Reply With Quote
Old 03-15-2018, 03:43 PM   #6
Senior Member
ernieh's Avatar
Join Date: Jul 2009
Posts: 1,114
Can't say for sure on your 2008, but on my 2012, there is a "always hot" outlet in the electrical bay. A short cord from the relay box plugs into the "always hot" outlet and the block heater cord plugs into the relay controlled outlet.

There is a virtually identical setup that provides 120v to the water heater. On my coach, the water heater relay is in the box with the heater, but I believe that some TMH coaches had the water heater relay in the electrical bay.

2012 Phaeton 36QSH
2007 Wrangler Toad
ernieh is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can A 30A MH Plug Into A 50A Outlet (with a plug converter of course) Ceratto's Grotto MH-General Discussions & Problems 15 06-13-2017 11:14 PM
To un-plug or not to un-plug Flyflicker Class A Motorhome Discussions 16 05-16-2011 06:42 AM
CC Recall Dealer can't find plug to un plug. Location Help dake Ford Motorhome Chassis Forum 7 12-25-2007 03:55 AM
Spartan Chassis plug in "diagonistic" plug David K Winnebago Industries Owner's Forum 24 12-21-2007 04:44 AM

» Virginia Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:05 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.