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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > No 12v input from battery, 2004 Terry Trailer

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Boon Docker

Mountain Foothills of Southern Alberta

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Joined: 10/30/2015

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Posted: 09/12/20 10:45am Link  |  Quote  |  Print  |  Notify Moderator

Gdetrailer wrote:




Example: DC Circuit Breaker
[image]

One should note that the breaker shown in photo IS a "self reseting" or "auto reseting" breaker (IE no reset button to push) and is typical breaker used by RV manufacturers.

HOWEVER, in order to get this breaker to auto reset, one MUST REMOVE BOTH POWER SOURCES (IE converter must be powered down AND the battery source must be disconnected from the circuit). Once all power has been removed from the circuit then and only then will the breaker reset.

Do that first before throwing parts at this.


Some misinformation above here.

What is the black button for in the image if it is an auto reset breaker?

Auto reset breakers are automatic reset, no need to power down anything.

Old-Biscuit

Verde Valley

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Joined: 06/20/2009

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Posted: 09/12/20 11:25am Link  |  Quote  |  Print  |  Notify Moderator

Boon Docker wrote:

Gdetrailer wrote:




Example: DC Circuit Breaker
[image]

One should note that the breaker shown in photo IS a "self reseting" or "auto reseting" breaker (IE no reset button to push) and is typical breaker used by RV manufacturers.

HOWEVER, in order to get this breaker to auto reset, one MUST REMOVE BOTH POWER SOURCES (IE converter must be powered down AND the battery source must be disconnected from the circuit). Once all power has been removed from the circuit then and only then will the breaker reset.

Do that first before throwing parts at this.


Some misinformation above here.

What is the black button for in the image if it is an auto reset breaker?

Auto reset breakers are automatic reset, no need to power down anything.


Correct^^^^^
Small button on end is the RESET button for that CB

AUTO Reset.....resets automatically ---no need to power down/power up, no disconnecting anything thing



As to POS or NEG location of fuse or CB
Fuse goes in series with the load, to protect the power supply if the load shorts out.
Fuse/CB can be on NEG but best practice is POS so 'power supply' is shut off/
NEG side leaves DC on POS which can accidentally be grounded

* This post was edited 09/12/20 11:36am by Old-Biscuit *


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
Off the road still Debt Free Jan. '14

BEagen

Huntington Station, NY

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Posted: 09/14/20 02:39pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all of the advice/responses. The positive battery cable goes under the A-frame and immediately up, into the floor of the trailer. I traced it with a tracer and it is unbroken back to the power boards/center and converter. No inline fuse/junction/etc. Googled the manual for the WFCO 45 amp converter and viola! Found 2/30 amp fuses (specifically for reversed polarity) on the "back" of the unit. Access to the fuses was virtually impossible due to where/how it was mounted. Managed to dismount the unit enough to coax the fuses out. Visual and continuity tests indicated they are OK. Even cleaned the ground for the neg. battery cable. At this point I figure the (14 year old) converter is shot. Thanks to all who came to my aid. Wish it had resulted in a better (cheaper) outcome. Stay safe.

afidel

Cleveland

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Posted: 09/15/20 09:56am Link  |  Quote  |  Print  |  Notify Moderator

Hey, just think of this as an opportunity to buy an upgraded converter. The much more capable units aren't really that much more expensive if you already have to do a replacement, shelling out $30 more for a PD unit that will actually correctly charge your batteries seems like a good investment to me =)
I can't justify it on the current rig as we almost never boondocks due to tiny tanks, but if I had a bad converter I know I'd pay the extra couple bucks.


2017 KZ Sportsmen Classic 181BH
2015 GMC 1500 Sierra 4x4 5.3 3.42 long bed
E2 WDH


opnspaces

San Diego Ca

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Joined: 12/22/2004

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Posted: 09/16/20 08:42pm Link  |  Quote  |  Print  |  Notify Moderator

BEagen wrote:

Thanks for all of the advice/responses. The positive battery cable goes under the A-frame and immediately up, into the floor of the trailer. I traced it with a tracer and it is unbroken back to the power boards/center and converter. No inline fuse/junction/etc. Googled the manual for the WFCO 45 amp converter and viola! Found 2/30 amp fuses (specifically for reversed polarity) on the "back" of the unit. Access to the fuses was virtually impossible due to where/how it was mounted. Managed to dismount the unit enough to coax the fuses out. Visual and continuity tests indicated they are OK. Even cleaned the ground for the neg. battery cable. At this point I figure the (14 year old) converter is shot. Thanks to all who came to my aid. Wish it had resulted in a better (cheaper) outcome. Stay safe.


The reverse continuity fuses should be between the batteries and the converter. I would recommend taking a voltage reading from the slots in the back of the reverse polarity fuses to a good ground. This way you can measure the voltage while the fuse is plugged in.
[image]

Remember that voltage and then compare it to the voltage at the batteries. The two numbers should be very close to each other.

If you read 12.xx volts at the batteries and 0 volts at the reverse polarity fuses you have a fuse or breaker problem that you still need to find.

Another thought. if you look carefully at the circuit board the fuses are on you will probably see where the battery charge wires are soldered in. They will be bigger wires and the board might also be labeled 12v pos and 12v neg. Take a reading between these two posts. If you read 12v your wiring is good from the batteries to the board. If 0 you have a bad circuit breaker or fuse to find. If 6v your batteries are still wired incorrectly.


2001 Suburban 4x4. 6.0L, 4.10 3/4 ton
2005 Jayco Jay Flight 27BH
1986 Coleman Columbia Popup.

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