Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Display Modes
Old 05-02-2016, 12:11 PM   #1
Site Team
Ford_6L_E350's Avatar
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,727
Caution for SMB Trailer owners

I've used my SMB trailer for over 10 years with my SMB. I got a new van and had to install a 7 pin connector for the electrics. I carefully checked the lights to ensure I wired the connector properly.

Discovered the Tail lights and Brake lights were reversed! Can't be reversed at the plug or the connector because the brake lights are 2 wires (right turn/left turn) while the tail lights are one wire. I had always checked the lights when I hooked up, and lights came on with the brakes, turn signals and headlights. This time I was more careful checking my work (I guess I thought the SMB work would be right) and discovered the tail lights are BRIGHT and the brake lights are dim. So, with the lights on the brakes and turn signals don't show on the trailer. Lights off I had dim brake/turn lights.

Both my light assemblies had the tail and brake light wires reversed. Cut and splice and all is well.

I doubt mine was the only trailer miswired like that.


Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
Ford_6L_E350 is offline   Reply With Quote
Old 05-02-2016, 09:26 PM   #2
Site Team
daveb's Avatar
Join Date: May 2007
Location: Turlock Ca
Posts: 10,174
Hey Mike what plug did it come with? Mine was the large standard trailer plug... not that it makes a difference because you're saying it's the light wiring itself. I've checked mine on every trip and have not found any issues but I'll look more closely. Thanks.

2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer

Sportsmobile 4X4 Adventures..........On and off road adventures
daveb is offline   Reply With Quote
Old 05-03-2016, 08:15 AM   #3
Senior Member
carringb's Avatar
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,071
Pretty common mistake with trailer builders, because the lights are colored to commercial wiring spec (red/brown/black) and the trailer wiring kits are RV spec (Brown/Green/Yellow) and the brown isn't the same function between the two.
2000 E450 dually V10 wagon
carringb is offline   Reply With Quote
Old 05-03-2016, 06:36 PM   #4
Senior Member
REF's Avatar
Join Date: Jan 2009
Location: Boulder, CO.
Posts: 2,178
Send a message via MSN to REF
more importantly......lets see that new van!
'03 Ford E350 7.3L Diesel
(de)SMB'd Custom RB-50
Quigley 4X4 w/Deavers & Agile Offroad's R.I.P. package
CCV High Profile Pop Top
REF 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

» Sportsmobile Registry



The Hulk

Add your Sportsmobile
Powered by vBadvanced CMPS v3.2.3

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

All times are GMT -6. The time now is 02:10 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.