Habitation 12V Electrics (1 Viewer)

[Bart]

Ok so i think i have found the relay that cuts of the power in the Habitation area when the vehicle is running.
is this the culprit ??
and if So What do i need to do so that the 12V electrics remain on when the MH is running.

 

[Stealaway]

You just need to connect the wires going to 30 and 87a or 87. They are the ones being switched by the relay.
I would wonder first why they have decided switching of the power to the habitation would be a good idea.
What are all the other mess of connections - are you related to @Ironbru?

 

[hilldweller]

I would wonder first why they have decided switching of the power to the habitation would be a good idea.

One neat suggestion was that it exempted them from doing a load of EMC tests for any interference of habitation side to engine side on the move.

Others have said just to stop distractions when on the move.

Neither make a scrap of sense in the real world.

The wiring to the relay seems pretty lightweight to be carrying all the hab side current.

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[Stealaway]

The wiring to the relay seems pretty lightweight to be carrying all the hab side current.

I didn't notice that, you're right - 30A relay 15A wire?

 

[chaser]

Depends what you want your had side to be running while driving, we had the same problem when wanting to charge tablets and things while on the move, but I solved this by adding some cig lighter plugs wired , through a fuse block direct to the jab battery , so cured that problem and don't really see any other need to alter the wireing

 

[Bart]

You just need to connect the wires going to 30 and 87a or 87. They are the ones being switched by the relay.
I would wonder first why they have decided switching of the power to the habitation would be a good idea.
What are all the other mess of connections - are you related to @Ironbru?

LOL thats naught to do with me ,, thats the way i found it when i removed this cover for the first time
The two boxes there are for free view,, so thats defunk,, as all tv's there days have it inbuilt, so i think ill rip it out

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[Deleted member 29692]

I would wonder first why they have decided switching of the power to the habitation would be a good idea.

Standard practice on UK built vans

 

[Bart]

Depends what you want your had side to be running while driving, we had the same problem when wanting to charge tablets and things while on the move, but I solved this by adding some cig lighter plugs wired , through a fuse block direct to the jab battery , so cured that problem and don't really see any other need to alter the wireing

That is why i originally removed this panel , to get a constant 12v supply so i could use that,, that is when i seen the relay and went,,,,,Hmmmmmm are you the culprit ...
probby the main reason i want it on all the time is for the water pump when driving , so you can wash hands.

 

[Deleted member 29692]

I didn't notice that, you're right - 30A relay 15A wire?

It doesn't even look that big.

@Bart are you sure that's the right relay? It would be odd for it to be just flapping around in the middle of nowhere like that.

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[Bart]

You just need to connect the wires going to 30 and 87a or 87. They are the ones being switched by the relay.
I would wonder first why they have decided switching of the power to the habitation would be a good idea.
What are all the other mess of connections - are you related to @Ironbru?

No's 30 and 87 were both giving 12v when the MH was running. ( they are linked ) so would it be just a case of removing the power going to 87 ?? so 30 remains in contact with 87a constantly ??

 

[Bart]

It doesn't even look that big.

@Bart are you sure that's the right relay? It would be odd for it to be just flapping around in the middle of nowhere like that.

That is why i'm asking , im not sure , i just know its in the back with most of the had 12v electrics right beside the control panel,, and not its not just flapping about , it was screwed in place at the rear of the cupboard

 

[Bart]

re what gets cut of in my MH when the engine running is as follows :
Water pump
fridge
2 x 12v sockets
i THINK the lights , ill have to check it.
so its not a lot anyways

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[Bart]

@Techno Andy can you be of any assistance here ?

 

[Deleted member 29692]

With the relay unplugged from the base like that is there any effect at all on the 12V system?

Is everything still working or not and does this change when you switch the ignition on?

 

[hilldweller]

I didn't notice that, you're right - 30A relay 15A wire?

Seems normal when Swift/Sargent are involved. I'd just don't believe what they use for leisure batteries.

Also there appears to be 5 wires to the relay, I wonder why ?

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[hilldweller]

The two boxes there are for free view,, so thats defunk,, as all tv's there days have it inbuilt, so i think ill rip it out

Good but lots of photos from different angles, just in case.

 

[hilldweller]

Try removing the wire to 85, leave relay plugged in. That might be all you need.

 

[Deleted member 29692]

Just a thought.

That couldn't be the fridge relay instead of the main 12v system one could it?

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[chaser]

re what gets cut of in my MH when the engine running is as follows :
Water pump
fridge
2 x 12v sockets
i THINK the lights , ill have to check it.
so its not a lot anyways

Unless you have a non standard fridge, that doesn't work off hab battery anyway , either switched on or not. It's either gas, 240 v or off the engine battery when on the move.

 

[Deleted member 29692]

Unless you have a non standard fridge, that doesn't work off hab battery anyway , either switched on or not. It's either gas, 240 v or off the engine battery when on the move.

Depends how old the van is.

Most current ones are auto change-over.

 

[chaser]

Depends how old the van is.

Most current ones are auto change-over.

Yeah but never run off the hab battery

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[Deleted member 29692]

Yeah but never run off the hab battery

Apologies, I misread your post

 

[Bart]

Just a thought.

That couldn't be the fridge relay instead of the main 12v system one could it?

Unless you have a non standard fridge, that doesn't work off hab battery anyway , either switched on or not. It's either gas, 240 v or off the engine battery when on the move.

Depends how old the van is.

Most current ones are auto change-over.

well that relay is right ABOVE the fridge , so poss could be.
The MH is 2007 , and is usually set to auto , it can be gas elec and battery ( not sure which battery mind ya )

 

[pappajohn]

Standard practice on UK built vans

Yep.....
NCC (National caravan council) requirement for certification.
Only their idea and not law.
They have some strange ideas.

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[irnbru]

What are all the other mess of connections - are you related to @Ironbru

Hey just happened to see this . Get it right man ...its @irnbru not @ironbru Check out the wiring now

 

[pappajohn]

It doesn't even look that big.

@Bart are you sure that's the right relay? It would be odd for it to be just flapping around in the middle of nowhere like that.

The relay on my old kontiki was chucked under the sofa, the charger and fuse box was the other side of the wardrobe wall.

 

[Bart]

Try removing the wire to 85, leave relay plugged in. That might be all you need.

ill try that tomorrow , after i 1st check and make sure its not anything to do with the fridge

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[Bart]

The relay on my old kontiki was chucked under the sofa, the charger and fuse box was the other side of the wardrobe wall.

there is actually a small circuit board and fuse box about the size of a book under the bench opposite the battery / charger , i never paid much attention to it when i was doing work at that end ,, but ill remove that cover as well tomorrow and make sure there is deffo no relay there as well.

 

[Bart]

Hey just happened to see this . Get it right man ...its @irnbru not @ironbru Check out the wiring now

i want to see pictures now
did you by any chance own the Bessacarr E560 before me

 

[pappajohn]

No's 30 and 87 were both giving 12v when the MH was running. ( they are linked ) so would it be just a case of removing the power going to 87 ?? so 30 remains in contact with 87a constantly ??

Yes.
The relay is the normally closed variety and power from the alternator OPENS the contacts making the circuit dead.
As long as there is no power triggering the relay the contacts are closed.

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