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Open Roads Forum  >  Tech Issues

 > 12v batteries not receiving charge from shore power.

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MEXICOWANDERER

las peƱas, michoacan, mexico

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Joined: 06/01/2007

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Posted: 05/30/21 03:01pm Link  |  Quote  |  Print  |  Notify Moderator

Diagnostics by Ouija Board are useless...

How many VOLTS do you see at the 12 volt red and white output wires at the converter?

Battery Voltage?

Take it one-step at a time

opnspaces

San Diego Ca

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Joined: 12/22/2004

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Posted: 05/30/21 04:43pm Link  |  Quote  |  Print  |  Notify Moderator

As Mexicowanderer says take it one step at a time.

First step, remove all sources of charging. Unplug shore power. Unplug the alligator clips from the solar panels. Do not run the generator. Disconnect the negative cable from the battery.

Now let the trailer sit overnight.

In the morning take a voltage check at the battery and write it down. This is your battery voltage and it's important to know it. If you don't know the battery voltage the results of the rest of your tests are suspect.

Now that you know the battery voltage hook up the negative cable to the battery and plug in the shore power. Take another voltage check at the battery and see of it is higher than battery voltage.

If the voltage is now higher then you charger is charging. It may still be doing a poor ineffective job of charging, but it is charging.

If you still have battery voltage at the battery then do as Mexico wander says and go to the power panel and see what voltages you have there.

Tell us what you find.


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

MrWizard

Traveling

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Posted: 05/31/21 02:07am Link  |  Quote  |  Print  |  Notify Moderator

Truck alternator charging trailer battery, that's good
But has nothing to do with the Wfco converter, which needs 120vac to it's battery charging


I can explain it to you.
But I Can Not understand it for you !

....

Connected using Verizon and AT&T
1997 F53 Bounder 36s


wa8yxm

Davison Michigan (East of Flint)

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Posted: 05/31/21 04:45am Link  |  Quote  |  Print  |  Notify Moderator

WFCO converters are known to have a high failure rate.. From others it is one fairly easily replaced part but I have no idea which (others might but are they reading this thread)

I suggest a Progressive Dynamics 9245 as the replacement for that one.

I have yet to find a better converter. Found a couple as good but none better than the Progressive Dynamics Wizard controlled units.
Optional Dongle
Alternative is the PD 9145 with charge wizard dongle (Sometime the 91-- pair will be cheaper but with the wizard dongle it is the same as the 92-- with dongle)


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


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