Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Model Specific Forums > Sunline Truck Campers
Click Here to Login

Join Sunline Club Forums Today

Thread Tools Search this Thread Display Modes
Old 01-10-2012, 07:45 AM   #1
Junior Member
Join Date: Jan 2012
Location: North Carolina
Posts: 4
SUN #3269
ronniewarren is an unknown quantity at this point
Radio noise when using dc power supply

I just purchased a 1992 sunline truck camper. Has dc power supply that automatically powers camper when plugged in. AM/FM radio in camper works great when working of truck battery alone. However when operating from dc power supply the noise and harsh hum is so bad in radio it will not work. There is a little black box wird in behind radio that when moved around agitates problem even more. Any advice on how to solve my problem.

ronniewarren is offline   Reply With Quote
Old 01-10-2012, 02:19 PM   #2
Senior Member
OhhWell's Avatar
Join Date: Feb 2011
Location: Florida
Posts: 213
SUN #1879
OhhWell is an unknown quantity at this point
Any idea what the little black box does? Is it wired to the incoming power supply? My first thought is that your power converter is sending out dirty power to the 12v but having the odd black box influence the noise is interesting.

Unfortunately, we recently got rid of our 94 or I would look behind the radio to compare.

I know in car audio that was usually an indication of something being grounded improper.

Current RV - 1999 Bounder 36s

Former trailers - '94 T-2770
'02 t-2753
'08 Keystone Sprinter 299BHSS
OhhWell is offline   Reply With Quote
Old 01-10-2012, 03:45 PM   #3
Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,234
SUN #2097
mainah is an unknown quantity at this point
It sure sounds as if you have a converter issue. If you have a volt meter check you DC power with the meter on the AC setting if it reads AC voltage your converter is giving you problems every thing most likely is working fine they will tolerate AC voltage.
mainah is offline   Reply With Quote
Old 01-12-2012, 10:54 AM   #4
Senior Member
Join Date: Jul 2007
Location: Massachusetts
Posts: 167
SUN #349
OPIE is an unknown quantity at this point
I had the same problem with my trailer. I wasn't paying for a new converter, and the filter was useless, way too may ground issues in a old trailer. Finally I gave up and wired a switch and a seperate circuit to the battery directly. No issues now, as long as remember to turn the switch off so the radio light doesn't drain the battery.

1983 T1550
OPIE 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
tow vehicle power works - battery/landline power do not af masterson Repairs and Maintenance 6 05-12-2009 05:28 PM
Radio Will Not Power Off Marylyn Repairs and Maintenance 3 08-17-2008 11:11 AM
07 - T2553 - Hitch & noise -- also bent frame.... precorguy Repairs and Maintenance 6 08-10-2008 06:51 PM
Suspension Noise wobbly Sunline Community 12 09-28-2007 11:13 AM
Dealer with remaining Sunline Supply nasa42a Sunline Community 2 01-20-2007 07:02 AM

» Featured Campgrounds

Reviews provided by


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

All times are GMT -6. The time now is 11:40 PM.