Help Big Foot 25RQ electrical issue - Fiberglass RV
Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-01-2020, 11:56 AM   #1
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
Help Big Foot 25RQ electrical issue

I have a 2019 BF 25RQ with cargo box. The outside 12v lights over the cargo box and over the 30 amp receptacle will not switch on. I checked with a meter and also just by shorting out between the switch poles. Nothing, apparently no power.
I bought two new Arcon Oval porch lights #20679 to replace the same OEM fixtures. I tested just before I removed and the side light came on but not the front. I removed the fixture, cleaned the sealants off and connected the new fixture using quick connect blade type connectors on the wires. I was not able to pull out the mfg's wire nuts, through the little hole in the surface of the trailer, wing nuts were too big and were very secure anyway. I just cut the wires coming out and installed the blade connectors. I them reconnected and...no lights. Neither the side nor the front would switch on.

I then took the new light fixture apart again and all connectors were tight and secure. I reinstalled.

I then went inside and tried to trace the wire from the 12v fuse panel to the splice or junction of the wires to where they might come together, thinking something might be loose. I could not find any such junction, splice, or connection. The connection on the fuse panel was secure.

I am a loss as to what to do next. Any thoughts or ideas will be appreciated. As you can probably tell I know nothing about electrics.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-01-2020, 12:06 PM   #2
Senior Member
 
Alex Adams's Avatar
 
Name: Alexander
Trailer: 1979 Boler B1300
New Hampshire
Posts: 908
Were the lights you replaced incandescent? The fixtures you used are LED and if the polarity of the incoming power is reversed, they will not light up. I would double-check that first.
Alex Adams is offline   Reply With Quote
Old 10-01-2020, 12:35 PM   #3
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
The OEM lights were LED. The replacement lights are LED also. Thanks for your response.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-01-2020, 12:51 PM   #4
Senior Member
 
AC0GV's Avatar
 
Name: Kenneth
Trailer: Scamp
Wisconsin
Posts: 1,008
Registry
Volt meter

Quote:
Originally Posted by Rzrbrn View Post
The OEM lights were LED. The replacement lights are LED also. Thanks for your response.
You did not say what you checked with the meter. Did you follow the voltage to the light? If so, reverse the wires. Not all LEDs care about polarity but most do.
Some of mine do not matter and in fact will run on 12 AC.
AC0GV is online now   Reply With Quote
Old 10-01-2020, 12:56 PM   #5
Senior Member
 
Dan Meyer's Avatar
 
Name: Dan
Trailer: Scamp
Minnesota
Posts: 646
Try your new light on the bench with a good, fully charged 12 volt battery.



--Dan Meyer
Dan Meyer is offline   Reply With Quote
Old 10-01-2020, 01:04 PM   #6
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
I don't have a good grasp of electrics. I just stuck the probes on the two metal tabs coming out of the switch in the light fixture. I did reverse but only because I did not know if I was doing it correctly. No power.

I have 4 BattleBorn fully charged batteries in the trailer, and it is connected to 30 amp shore power. In order to try the light on the bench I will have to take it off the trailer. This is a good idea. At least I will know if the new switch is any good. I will try this tomorrow. Thank you for the suggestions. I will be back later tonight to check on this thread.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-01-2020, 02:26 PM   #7
Senior Member
 
AC0GV's Avatar
 
Name: Kenneth
Trailer: Scamp
Wisconsin
Posts: 1,008
Registry
Open circuit

Quote:
Originally Posted by Rzrbrn View Post
I don't have a good grasp of electrics. I just stuck the probes on the two metal tabs coming out of the switch in the light fixture. I did reverse but only because I did not know if I was doing it correctly. No power.

I have 4 BattleBorn fully charged batteries in the trailer, and it is connected to 30 amp shore power. In order to try the light on the bench I will have to take it off the trailer. This is a good idea. At least I will know if the new switch is any good. I will try this tomorrow. Thank you for the suggestions. I will be back later tonight to check on this thread.
Measuring voltage, follow the voltage from the battery, through all switches and wires. The problem will be located between the two locations where you do and no not have voltage. I have over the years found bad wire, bad NEW fuses, and bad factory connections.
Please let us know what you find.
Attached Thumbnails
9 VDC LED.jpg  
AC0GV is online now   Reply With Quote
Old 10-01-2020, 03:06 PM   #8
Senior Member
 
Name: Bruce & Kathryn
Trailer: Bigfoot 25 RQ
North Carolina
Posts: 116
I assume the replacement fixtures came with new switches. On mine, I ended up replacing all the OEM switches with new. They all work fine now. Hope you can resolve this issue.
Bruce Olive is offline   Reply With Quote
Old 10-01-2020, 06:32 PM   #9
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
Yes the new fixtures come with switches.

I have a clamp meter. I wonder if running the wire through the clamp can be done for 12v to determine if there is current?
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-01-2020, 06:51 PM   #10
Senior Member
 
Name: Bruce & Kathryn
Trailer: Bigfoot 25 RQ
North Carolina
Posts: 116
Well, they did work and then they did not. My theory based on similar fixtures is the switches went bad and the replacements are suffering from reversed polarity. As mentioned earlier in the thread, many LED fixtures are highly sensitive to polarity. Have you tried to reverse the wiring of the new fixtures?
__________________
“Tomato Man”
Buce, Kathryn & Oscar the pug
Bigfoot 25 RQ
Towed by 2018 Chevy High Country Duramax
Bruce Olive is offline   Reply With Quote
Old 10-01-2020, 06:53 PM   #11
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
Bruce I just wired the new one like the OEM fixture since they are the exact same item. It won't destroy the switch if wired in reverse will it?
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-01-2020, 06:56 PM   #12
Senior Member
 
Name: Bruce & Kathryn
Trailer: Bigfoot 25 RQ
North Carolina
Posts: 116
Also, a 12 VDC test tool is only $10 or so at any auto parts store. Basically a probe with a flashlight bulb and a wire with an alligator clip. Very handy for RV DC testing. Good to have in your took kit. Best of luck.
__________________
“Tomato Man”
Buce, Kathryn & Oscar the pug
Bigfoot 25 RQ
Towed by 2018 Chevy High Country Duramax
Bruce Olive is offline   Reply With Quote
Old 10-01-2020, 06:58 PM   #13
Senior Member
 
Name: Bruce & Kathryn
Trailer: Bigfoot 25 RQ
North Carolina
Posts: 116
Switch will be fine. Worth a shot.
__________________
“Tomato Man”
Buce, Kathryn & Oscar the pug
Bigfoot 25 RQ
Towed by 2018 Chevy High Country Duramax
Bruce Olive is offline   Reply With Quote
Old 10-01-2020, 07:08 PM   #14
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
Thanks for the tip Bruce.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-02-2020, 04:22 PM   #15
Member
 
Name: Arthur
Trailer: Between RV's But Shopping
Mississippi
Posts: 33
Electrical Troubleshooting ...

Quote:
Originally Posted by Rzrbrn View Post
I have a 2019 BF 25RQ with cargo box. The outside 12v lights over the cargo box and over the 30 amp receptacle will not switch on.
Sent You A Private Message ....


.
Arthur II is offline   Reply With Quote
Old 10-05-2020, 03:44 PM   #16
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
I took the trailer in to the RV service center. The switch in the light fixture over the 30 amp receptacle was bad and has been replaced. The light fixture over the cargo box was replaced. The fuse for these two fixtures was blown. I checked that fuse a number of times but sure enough it was blown when the RV tech pulled it. Oh well...Both fixtures are now new and attached with butyl tape and finished with ProFlex sealant. I bought two new waterproof switches which I will have a backup.

Thanks to everyone who responded.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
Rzrbrn is offline   Reply With Quote
Old 10-05-2020, 04:54 PM   #17
Senior Member
 
AC0GV's Avatar
 
Name: Kenneth
Trailer: Scamp
Wisconsin
Posts: 1,008
Registry
Fuse test

Quote:
Originally Posted by Rzrbrn View Post
I checked that fuse a number of times but sure enough it was blown when the RV tech pulled it.
Thanks to everyone who responded.
I have had fuses look good and be bad many times. Most people look for the "black" of a blown fuse, but they can just vibrate open or even be bad when new. The best way is to test for voltage on both sides of the fuse.
Attached Thumbnails
fuse test.jpg  
AC0GV is online now   Reply With Quote
Old 10-06-2020, 12:05 AM   #18
Senior Member
 
Name: Elliott
Trailer: Bigfoot
Everywhere
Posts: 370
If you don't have an easy ground point to test against, you can also either pull the fuse out and continuity-check it, or measure the voltage across the two sides of the fuse (anything but ~0V means it's bad).
Defenestrator is offline   Reply With Quote
Old 10-06-2020, 07:11 AM   #19
Senior Member
 
Name: Bruce & Kathryn
Trailer: Bigfoot 25 RQ
North Carolina
Posts: 116
Glad it’s fixed.
__________________
“Tomato Man”
Buce, Kathryn & Oscar the pug
Bigfoot 25 RQ
Towed by 2018 Chevy High Country Duramax
Bruce Olive is offline   Reply With Quote
Old 10-06-2020, 07:28 AM   #20
Senior Member
 
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,239
The RV tech that worked on it this time is an electro an with a great deal of experience and he showed me how to clean the fuse with my merger.

Turns out when I took it in the first time the fellow that worked on it “tested” the circuit by holding a screwdriver across the switch posts, one of which sparked, I saw it happen. He had previously checked the fuse and it was ok. I thought he knew what he was doing and the thought it was a nifty way to check to see if the line had electricity. The electrician said don’t do that, and is what blew the fuse. This electrician also identified the errant switch right off.
Rzrbrn is offline   Reply With Quote
Reply

Tags
electrical


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
My Big Foot lost his Foot RV NUT CASE Problem Solving | Owners Helping Owners 15 03-24-2017 12:54 PM
OH | 2008 25 Foot Big Foot For Sale $24,500 Boomer Classified Archives 12 02-07-2014 01:26 PM
OK | 2008 25 Foot Big Foot For Sale $24,500 Boomer Classified Archives 0 07-11-2013 05:39 PM
SOLD 1986 Big Foot - 18 foot on EBAY Dave Baston Classified Archives 31 01-16-2008 06:41 PM

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

Reviews provided by


All times are GMT -6. The time now is 06:57 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.