Ground wire help - Page 2 - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-11-2014, 01:53 PM   #15
Member
 
Name: Gina
Trailer: 1975 Boler
Arizona
Posts: 44
I believe the GMC uses 3 bulbs per tail lights. So they are separate bulbs.
__________________

__________________
aznative is offline   Reply With Quote
Old 03-11-2014, 03:51 PM   #16
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
In that case, you may need the GMC trailer wiring harness or some kind of a converter like the foreign trucks use. Most american vehicles use the same bulb for stop and turn and the foreign trucks that have a yellow turn lamp require a converter for the american wired trailers so they will work. You should have someone work the brakes and turn signals and observe what is happening.
__________________

__________________
Darwin Maring is offline   Reply With Quote
Old 03-11-2014, 06:40 PM   #17
Senior Member
 
Filbert V.'s Avatar
 
Name: Filbert
Trailer: Tote N Tarry
California
Posts: 216
I"m not sure Darwin, would it make a difference in something?
__________________
Filbert V. is offline   Reply With Quote
Old 03-11-2014, 06:45 PM   #18
Senior Member
 
Filbert V.'s Avatar
 
Name: Filbert
Trailer: Tote N Tarry
California
Posts: 216
Thanks for the TV lesson. I guess I'm more comfortable with tow vehicle! One of those lost in translation lessons. Now, would it be easier for me to just buy an entire new tail light kit from e-trailer or hitch anything, or will I still have problems between the tow vehicle and trailer? My electrical knowledge is sorely lacking.
__________________
Filbert V. is offline   Reply With Quote
Old 03-11-2014, 07:25 PM   #19
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
If you look for a plug-and -play harness it will come with a converter box to the flat-4 plug configuration if needed.

There are the ones that plug into an existing dedicated trailer light harness and others, with a "T" connector, that break into the existing tail light harness.

If you look your vehicle up on eTrailer.com I am sure you can figure out what's included with the different harnesses.

As far as I know, North American trailers always use combo turn and stop lights and get by with the standard 4 pin flat connector.
__________________
Bob Miller is offline   Reply With Quote
Old 03-11-2014, 07:26 PM   #20
Senior Member
 
Francesca Knowles's Avatar
 
Name: Francesca Knowles
Trailer: '78 Trillium 4500
Jefferson County, Washington State, U.S.A.
Posts: 4,543
Registry
Quote:
Originally Posted by Filbert V. View Post
Thanks for the TV lesson. I guess I'm more comfortable with tow vehicle! One of those lost in translation lessons. Now, would it be easier for me to just buy an entire new tail light kit from e-trailer or hitch anything, or will I still have problems between the tow vehicle and trailer? My electrical knowledge is sorely lacking.
This is as good a place as any to start learning- better than most, really. Since nothing's working right anyway, why not try to fix the original trailer lights? Someone posted a diagram on page one of this thread. I'd bet your trailer wires follow that color coding. And if they don't, the Scamp diagram in the document center here probably does.

Wiring in these teeny trailers is surprisingly simple. Even I have learned the system...and I'm one of those people to whom James Thurber's Mother's contention that empty light sockets leak electricity makes perfect sense!


If someone like me can learn to do it, surely you can. You DO have the advantage of that extra "Y" chromosome, after all...
__________________
.................................
Propane Facts vs. Fiction:. Click here
Tow Limit Calculator: Click here
Francesca Knowles is offline   Reply With Quote
Old 03-11-2014, 08:07 PM   #21
Senior Member
 
Name: Randy
Trailer: 1980Trillium 1300
Ontario
Posts: 355
Here is my analysis for your problems-I could be wrong though-...
1/ White wire is usually for ground or frame contact-with bolt tightened and ..grease it-
2/ Check your 7-pin connector wirings from your towing vehicle-WITHOUT TRAILER HOOKED UP-
3/ Check your 7-pin connector wirings from your trailer ONLY-without hooked up with towing vehicle.
4/ Use an external power source 12VDC for testing your trailer lights/brake
5/ Use volmeter or a simple 12VDC light bulb to test your 7-pin connector of your vehilce(without trailer hooked up).
Conclusion: You will surely find out what's wrong with your problems-GUARANTEED- My guess here is you have WRONG CONNECTION. Hopefully it helps....
__________________
Thinh is offline   Reply With Quote
Old 03-11-2014, 08:51 PM   #22
Senior Member
 
Filbert V.'s Avatar
 
Name: Filbert
Trailer: Tote N Tarry
California
Posts: 216
Thanks everyone. I'll see how we make out on Saturday when we play with the lights before I take the truck/trailer combo to the local RV shop to wave the white flag and give the VISA card a work out. Still kicking myself for not paying more attention to my dad and uncle who could fix anything anywhere, and with whatever supplies they had on hand. Too bad we can't use the old hand signals while towing. At least they never break!
__________________
Filbert V. is offline   Reply With Quote
Old 03-13-2014, 06:49 AM   #23
Senior Member
 
Jared J's Avatar
 
Name: Jared
Trailer: 1984 19' scamp
Kansas
Posts: 1,610
The best thing to do when trouble shooting is to split a system in half, in this case, this would be the trailer and tow vehicle. That allows you to quickly narrow the problem down.

The easiest thing to do will be to go buy a $20 trailer light tester that plugs into your vehicle. They make ones that work for both 7 pin rv and 4 flat connections. You can use an ohmmeter also, but the tester is cheap and easy.

If that works, hook a 12 v battery to your ground and the left or right flasher pin of your trailer harness. If both lights still light up, you have a wiring problem. They won't flash, that is done by your vehicle, they will just be on steady. You could also pull the bulbs out and then use an ohmmeter on the left and right pins at the trailer connector. There should be no continuity.

If both sides test good, then you probably need the converter box (without knowing anything about the trailer and tow vehicle).

The other possibility is that the wrong bulb is installed in your taillights, and your turn signals and brake lights are back feeding each other. I've seen it before, it does very interesting things if you put a one contact bulb in a two contact socket.
__________________
Jared J is offline   Reply With Quote
Old 03-13-2014, 02:04 PM   #24
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
Filbert:
In times of past the bulb for the brake light, turn signal and running light was one bulb with 2 filaments in it. It was easy to see the filaments and to also identify the bulb because it has 2 round lead connections on the bottom. One filament is the running light and the brighter one is the Stop/Turn. The other smaller filament is the running light, it is on when you turn on your headlights.

When you applied the brakes, both the left and right bulb bright filament would light. If you applied the brakes and the turn signal at the same time, one bulb would remain lit and the other would blink. If you applied the turn signal only, then only that bulb would lite.

If you have your headlights on then the smaller filament is lit and the larger, brighter filament will be the brake/turn light.

NOTE: This is how USA Camping and utility trailers are wired.
Is there an exception? You can bet that someone will tell us that they saw a trailer wired different.

You can check your trailer to see if the tail lights look like this:

1 dual element bulb behind the Red lens and 1 single element bulb behind a clear lens if it has backup lights and 1 small bulb or a clear lens under the left side red lens that will cast a white light on the license plate.
------------------------
Foreign Cars: The foreign cars that have a RED stop and running lights and a Yellow turn signal require a special solid state device to be installed on the tow vehicle to properly change and operate the trailer lights to the US specifications.
This device changes the foreign configuration to the US specifications. You can find plug compatible devices and cables at the following places:

e-Hitch.com | Taillight Converters
etrailer.com - Products t connector

My 2007 Chevy Silverado Classic has a separate bulb for the turn signal and a separate bulb with 2 elements in it for the running lights and brake light. In other words, it is wired like the foreign cars. It came with the tow package so somewhere in the vehicle they installed a converter so trailer lights would be at US specifications.
If yours is wired like mine then there is a possibility that you can get a plug in T-Connector that will straighten everything out.

I suggest you contact the above web sites, tell them what your tow vehicle is and they should be able to tell you what you need.

If it is a T Connector then just lay on your back under the rear bumper and install it in less than 10 minutes.

Check aznative post of the wiring diagram
__________________
Darwin Maring is offline   Reply With Quote
Old 03-16-2014, 06:31 PM   #25
Senior Member
 
Filbert V.'s Avatar
 
Name: Filbert
Trailer: Tote N Tarry
California
Posts: 216
Thanks everyone for your advice/help. We finally got under the trailer, ground off some rust in one spot, drilled a hole, and attached the ground wire to the frame with a metal screw, and ALL OF THE LIGHTS WORK!!!! My father had two sets of wires, and 4 tail lights, but only two were actually attached, and these are the two that work now. We'll keep the original lights attached, but they'll serve as dummies for now. Now that we have lights, I have also made my first campground reservation for a local test run next month. I am truly a happy camper now and thanks to all of you for replying to my original post.
__________________
Filbert V. is offline   Reply With Quote
Old 03-16-2014, 06:43 PM   #26
Senior Member
 
Francesca Knowles's Avatar
 
Name: Francesca Knowles
Trailer: '78 Trillium 4500
Jefferson County, Washington State, U.S.A.
Posts: 4,543
Registry
Quote:
Originally Posted by Filbert V. View Post
We finally got under the trailer, ground off some rust in one spot, drilled a hole, and attached the ground wire to the frame with a metal screw, and ALL OF THE LIGHTS WORK!!!!


No kidding...

Just about the very first thing I learned about trailer lights is is that nine problems out of ten are caused by insufficient/bad ground.

Happy Campin' !
__________________

__________________
.................................
Propane Facts vs. Fiction:. Click here
Tow Limit Calculator: Click here
Francesca Knowles is offline   Reply With Quote
Reply


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
Frame Ground/Chassis Wire multi-task Electrical | Charging, Systems, Solar and Generators 35 04-28-2013 05:44 PM
yellow wire/brown wire deryk Electrical | Charging, Systems, Solar and Generators 24 01-01-2013 06:34 PM
Will this work? Ground wire Bobbie Mayer Electrical | Charging, Systems, Solar and Generators 21 09-25-2012 01:23 PM
How do you make a scamp trailer higher off the ground Charlie Smith Care and Feeding of Molded Fiberglass Trailers 4 05-12-2009 02:39 PM
SOLD - 2001 scamp 16-ball ground/canton, GA Greg A Classified Archives 1 01-09-2009 11:37 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:13 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.