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-   -   Advice on electrical problem in motorhome (https://forums.motorhomefacts.com/49-tech-mech-chat/239947-advice-electrical-problem-motorhome.html)

Yvonne and Ward 15-10-2020 16:19

Thank you, Jean-- yep, we've pressed that one 'til we're blue in the face (ha).

jiwawa 15-10-2020 16:56

I thought you probably had but best to check!

jiwawa 15-10-2020 17:01

What about your electroblok that controls all the 12v? Mine is under the driver's seat (LHD). Maybe a fuse gone or something popped out?

rayc 15-10-2020 17:07

1 Attachment(s)
Can you confirm you have a CBE DS300 type 12v distribution box?

jiwawa 15-10-2020 17:08

On page 4 of the manual available here

https://www.google.com/url?sa=t&sour..._6LBTErVqFvfrv

there is a pic of a 'tap' that governs all the 12v to the hab area.

It refers to an A class but it's possible they use the same system in others?

Yvonne and Ward 15-10-2020 18:01

Quote:

Originally Posted by rayc (Post 3117257)
Can you confirm you have a CBE DS300 type 12v distribution box?

Yes, we have a distribution box like this one, a DS304. Just in case the problem was there, I replaced all the fuses in it.

Glandwr 15-10-2020 18:05


rayc 15-10-2020 19:05

1 Attachment(s)
Quote:

Originally Posted by Yvonne and Ward (Post 3117269)
Yes, we have a distribution box like this one, a DS304. Just in case the problem was there, I replaced all the fuses in it.

Can you remove the cover and with your multimeter check the leisure battery voltage on the large screw connectors ?
Contact -B2 is common negative.
Contact +B2 is positive leisure battery.
[Contact +B1 is positive engine battery].

rayc 15-10-2020 20:02

1 Attachment(s)
This is the wiring diagram. As you can see there are two inputs to contact B2- and B2+. One is the leisure battery and the other the charger output. The fact that it works with the charger on but not the battery alone points to trhe leisure battery positive not getting to contact B2+. I would suspect that 50A fuse in the line from the leisure battery + to contact B2+.

Yvonne and Ward 16-10-2020 11:17

Quote:

Originally Posted by rayc (Post 3117285)
This is the wiring diagram. As you can see there are two inputs to contact B2- and B2+. One is the leisure battery and the other the charger output. The fact that it works with the charger on but not the battery alone points to trhe leisure battery positive not getting to contact B2+. I would suspect that 50A fuse in the line from the leisure battery + to contact B2+.

Thx so much for this Rayc-- when I multimeter test the leisure battery itself it reads 12.75 volts. When I took the cover off the distribution box as you suggested, the multimeter test of leisure battery through B2 bolts is only 11.37v. What does that mean to you? Again, really grateful for your know-how!


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