no 12V power

[pats]

2015b Bailey 740 Autogtraph
I have no 12V power, The control panel is completely dead when unplugged from the EHU, all works fine on EHU, The leisure battery is fully charged, checked with multi meter, I've searched high & low but cant find any fuses, apart from the normal fuses on the PDU.
Its driving me mad! Help!

 

[Diabalo]

There should be fuses at the battery end

 

[pats]

Theres no fuse in here??

 

[pats]

This is what I have

 

[Lenny HB]

Ok you have volts at the battery so check the voltage where the leads from the batteries go into the distribution unit, if there are no volts there it must be a blown fuse.
If you have volts there it is most lightly to be either a distribution unit fault or a control panel fault.

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[Diabalo]

Theres no fuse in here??

View attachment 715767

To protect the wiring there should be a fuse as close to the battery positive as possible.

 

[pats]

There should be fuses at the battery end



The wires dissapitr into here

 

[Diabalo]

Those wires will end up at the distribution box. As@Lenny HB said check there, If no 12V work your way back to the battery.

 

[Littlewheels]

This connection looks a bit raggy .

 

[Diabalo]

It looks like it's attached so doubt that's the culprit

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[L' Hobo]

If it's on a Stellantis made vehicle, (Fiat etc) I would be checking all the earth connections too.

 

[pats]

This connection looks a bit raggy .





Well spotted! but its ok, all the way through to other side

 

[pats]

If it's on a Stellantis made vehicle, (Fiat etc) I would be checking all the earth connections too.

Its a PeugeoBoxer, given up!

 

[Jev88]

View attachment 715779

Get underneath and follow the cable?

 

[The Artilleryman]

There should be fuses at the battery end

It's a Bailey, so NO not by the battery, there will be maxi/midi fuses close to the PDU.

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[Whiteknight]

2015b Bailey 740 Autogtraph
I have no 12V power, The control panel is completely dead when unplugged from the EHU, all works fine on EHU, The leisure battery is fully charged, checked with multi meter, I've searched high & low but cant find any fuses, apart from the normal fuses on the PDU.
Its driving me mad! Help!

There is an inline separate from the battery and the charging unit on our 794 it’s under the front facing rear seat. I think its a 20amp if my memory serves me correctly.

 

[bikerman0346]

Ok you have volts at the battery so check the voltage where the leads from the batteries go into the distribution unit, if there are no volts there it must be a blown fuse.
If you have volts there it is most lightly to be either a distribution unit fault or a control panel fault.

I recently posted a similar query. The mechanic suspected the control panel circuit but it was an isolation switch. It was driving me mad replaced all the fuses I could find . Sometimes it's better just to a motorhome auto electician, they solved it by process of elimination.

 

[Bob2000EK]

Hi,
Just had a very similar problem. No 12v, including no 12v fridge when driving, but full 12v on mains hook up. It turned out to be the leisure battery lead/s from leisure battery to fusebox. The negative wire had come out of one connection, so the leisure battery was not connected. Once screwed back in the 12v system worked as it should. The separated connection was hidden under a bunch of wiring so was not immediately apparent.

I think what was happening was the 12v system was earthing through the Zig unit on mains connection, and in effect the Zig was trying to charge the 12v system.... So, the Zig ran the 12v system on mains as the leisure battery was not connected due to the negative wire having disconnected itself from the leisure battery.

I am not an electrician as such, so my explanation maybe incorrect, but it worked for us and I think explains what happened in our case.

The fridge not working when driving maybe the tell tail sign as I think it is only allowed to draw power from the leisure battery when the engine is running and the alternator is charging the leisure battery. If the leisure battery lead/s is broken / disconnected then the fridge cannot work..

Hope this helps.