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Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
When I started my van for the trip home yesterday the step didn’t retract then I noticed there was no power going to the leisure batteries also the fridge isn’t working on 12 volt ,
Any help appreciated . I have checked all the fuses in the van
 
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Adam b

Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
Batteries are fine I can charge them with the 240 they have just stopped charging while we are driving
& everything else works fine
 

suavecarve

LIFE MEMBER
Aug 18, 2009
7,847
40,115
Surrey/Hants
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8,035
MH
Rollerteam 685
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July 09
The step works with the switch, just need to find the cause of these 3 things all going off at the same time
Probability of the relay for the switch which is found somewhere underneath the step. That appears to be working with the engine off so 12 volt supply is ok.
Normally gunk going into the box from underneath and can be cleaned with some wd40.

Whether that issue causes the other issues, I dont know
 

Stonemags76

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Aug 14, 2011
1,295
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Derbyshire Dales
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17,756
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Auto Sleepers Warwick Duo
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Full Time 2011-2013, now part timers!
I might be going mad, but I’m sure I read that the fridge & the step are on the same fuse somewhere?
 
Dec 10, 2013
3,431
12,800
South Staffs
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29,333
MH
Pilote P740GJ
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Since 2013
Probability of the relay for the switch which is found somewhere underneath the step. That appears to be working with the engine off so 12 volt supply is ok.
Normally gunk going into the box from underneath and can be cleaned with some wd40.

Whether that issue causes the other issues, I dont know
I would guess at a relay switch as well.
 
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Adam b

Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
I might be going mad, but I’m sure I read that the fridge & the step are on the same fuse somewhere?
The 3 things not working are all linked to the D+ signal that may be fused on your Sargent PSU/fuse box (EC460 ?)
The 40 amp fuse at the starter battery positive terminal would also be worth checking
PSU is an ECU400
 
Jun 26, 2018
1,012
5,429
North West
Funster No
54,605
MH
Florium Wincester
Exp
Europe & USA since April '21
When my step and 12v to fridge stopped working, it was one of the red 50amp mega fuses. Which in our van was a group of fuses under the passenger footwell, at the vehicle battery main connections.

Hope this helps.
 
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Adam b

Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
When my step and 12v to fridge stopped working, it was one of the red 50amp mega fuses. Which in our van was a group of fuses under the passenger footwell, at the vehicle battery main connections.

Hope this helps.
I had a check of this fuse earlier it looked ok
 
Jun 26, 2018
1,012
5,429
North West
Funster No
54,605
MH
Florium Wincester
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Europe & USA since April '21
Mine did until I checked continuity with a multi meter and it had blown. The nice red cover looked fine but behind it had melted away.
 
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Adam b

Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
Mine did until I checked continuity with a multi meter and it had blown. The nice red cover looked fine but behind it had melted away.
I will check again tomorrow thanks

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Oct 10, 2018
2,036
1,162
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
There may be another separate orange 40 amp fuse near the starter battery for EC400 supply and fuse 4 (15amp) on the PSU may be worth double checking .
If all fuses are ok it may be a fault with the EC400 which controls (along with many other things) the 3 x items not working and a call to Sargent may be worthwhile 01482 678981
 
Apr 27, 2016
7,019
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Manchester
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42,762
MH
A class Hymer
Exp
Since the 80s
Starting from basics, are you sure the alternator is working? Does it charge the starter battery? The voltage should rise, from about 12.5V to over 13.5V when the engine starts. Does the red alternator light on the dashboard come on when the ignition is switched on, and go off when the engine is running?
 
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Adam b

Adam b

Free Member
Jul 3, 2013
244
327
South queensferry
Funster No
26,783
MH
Auto cruise carrera4
Exp
2003
The stater battery is charging & the alternator light goes out. We had been away for the weekend without hook up & all was well, I plugged the van in when we got home & charged the leisure batteries.
 
Feb 18, 2022
583
658
Bedfordshire, UK
Funster No
86,954
MH
RT Pergaso 740
The 3 things not working are all linked to the D+ signal that may be fused on your Sargent PSU/fuse box (EC460 ?)
The 40 amp fuse at the starter battery positive terminal would also be worth checking
I was thinking the same "D+ signal"

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Feb 18, 2022
583
658
Bedfordshire, UK
Funster No
86,954
MH
RT Pergaso 740
The stater battery is charging & the alternator light goes out. We had been away for the weekend without hook up & all was well, I plugged the van in when we got home & charged the leisure batteries.
Do the batteries get hot when charged?, feel the sides of them when nearly charged.
 
Apr 27, 2016
7,019
8,224
Manchester
Funster No
42,762
MH
A class Hymer
Exp
Since the 80s
I was thinking the same "D+ signal"
I think so too. The step retraction, fridge 12V power, and leisure battery charging from the alternator are all switched by the D+ (engine running) signal.

The actual D+ signal is working, because the dashboard alternator light goes out when the engine is running. I don't know the details of how the D+ signal gets to the habitation devices. Usually there is a relay switched on by the real D+ signal, which can provide a bit more power, and avoid overloading the alternator D+ signal.

The supply to that relay will have a fuse, usually 2A or 5A. It might be located near the starter battery or in the distribution box.
 
Dec 18, 2014
124
82
London
Funster No
34,515
MH
Elddis 185
Exp
since 2010
There was a post recently about the step not retracting when the engine started maybe a Ducato or Peugeot. The problem was the relay which is situated in the (d?) frame upright which is on the right hand side just beside /behind the drivers seat. Check everything else as mentioned above as it’s quite fiddly getting to the relay.
 

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