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Open Roads Forum  >  Class A Motorhomes  >  General Topics

 > 12 volt receptacles shorting 12 volt accessory charge cords

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billyray50

North Dallas

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Posted: 10/17/20 07:55am Link  |  Quote  |  Print  |  Notify Moderator

We bought a 2020 Jayco precept 34g gas motorhome with the ford f53 chassis and v10 engine. The coach has 3 12 volt dc outlets in the cockpit. So far while trying to charge GPS and TPMS monitor and not both at same time the charge cords shorted out. Also blew 12 volt cord for a sharper image seat cooler inline 6 amp fuse. Seat cooler was the only item plugged in at the time. Help!

MountainAir05

New Mexico

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Posted: 10/17/20 08:23am Link  |  Quote  |  Print  |  Notify Moderator

take a reading off the connector. I am only reading that it shorts out what you plug into it.

BB_TX

McKinney, Texas

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Posted: 10/17/20 08:41am Link  |  Quote  |  Print  |  Notify Moderator

What exactly do you mean by "charge cords shorted out"?

billyray50

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Posted: 10/17/20 09:01am Link  |  Quote  |  Print  |  Notify Moderator

Both 12 volt charge chords for GPS and TPMS monitor will not work anymore. Also 12 volt cell phone chord keeps blowing fuses. Two separate phone chargers.

Matt_Colie

Southeast Michigan

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Posted: 10/17/20 09:04am Link  |  Quote  |  Print  |  Notify Moderator

Billyray,

You should be aware that there are no standards for the ubiquitous 12V mousehole. So, there are no "standard" sockets and no guaranteed to fit plugs to go in them. There is also no designed means to retain any plug. I could actually go on for a while longer about the things that are bad about them.

It sounds to me like you just ran into things that are incompatible.
I can't tell you what to do about it other than try other things. If the plug you are using delivers power and doesn't blow a fuse, you can sometimes get it to stay put by jamming a toothpick in there.

Matt


Matt & Mary Colie
A sailor, his bride and their black dogs going to see some dry places that have Geocaches in a coach made the year we married.


billyray50

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Posted: 10/17/20 09:04am Link  |  Quote  |  Print  |  Notify Moderator

MountainAir05 wrote:

take a reading off the connector. I am only reading that it shorts out what you plug into it.
Will do. Thanks.

dougrainer

Carrolton, Texas

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Posted: 10/17/20 09:22am Link  |  Quote  |  Print  |  Notify Moderator

The Plugs are NOT Ford. So, I will bet the polarity of the plugs are reversed. THAT is why you are destroying the cords. The OUTER silver case is Negative and the inside rear is the positive. IF reversed, it is very easy to gain access on a Precept to reverse the spade terminals on the back of the receptacles. Also, KEEP the bad cords and receipts for them. Jayco will reimburse you thru your Jayco dealer. IF indeed it is reverse polarity. IF you fix it yourself, TAKE PICS of the reversed wiring and then when it is corrected. Doug

Executive

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Posted: 10/17/20 09:42am Link  |  Quote  |  Print  |  Notify Moderator

There are only two reasons why you would experience what you are getting. One, the receptacles are not 12VDC and reverse polarity. I believe Doug has answered the reverse polarity issue which is more common than you think. Rarely will you find them wired with a 120VDC circuit. The plugs simply screw out and they're pretty easy to get to. Hold the outside part and unscrew the inside part. Use a meter to check voltage. Since you're experiencing the same issue with all three, it's in the wiring. If someone wired one wrong they wired all three wrong. Easy and cheap fix...Dennis


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MrWizard

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Posted: 10/17/20 10:56am Link  |  Quote  |  Print  |  Notify Moderator

Reverse polarity on 12v ?
Maybe
Most 12vdc would simply not work, except 12v fans would run backwards, and 12v incandescent interior RV lamps would light
Problem
The items mention use 5v internally
Reverse polarity would mess with voltage regulation on the circuit boards, creating overload conditions, If the device even turned on and worked
Did These incidents occur while parked
Are these outlets powered by RV 12v circuit?
Converter voltage could be Too High
Or
It could have A.C. voltage ripple in the DC output
Either way it would be a converter problem


Radiate The Happy
....

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


hotjag1

Lake Chelan, Wa/Lake Havasu, Az.

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Posted: 10/17/20 11:04am Link  |  Quote  |  Print  |  Notify Moderator

I had exactly the same problem because I had wired them backwards..."reverse polarity". Switched the 2 wires around and they work perfectly.


hotjag1
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