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Leisure battery not charging
Posted: Wed Apr 20, 2016 5:10 pm
by bongobeliever
Hi Bongo chums! My leisure battery charges nicely when it's hooked up, but as far as I can tell it doesn't charge at all on a journey like it's supposed to (and always did). I have a built-in Power Management System. Any suggestions? I have a multimeter - which might provide the answer if I knew what I was looking for! Thanks in advance
Re: Leisure battery not charging
Posted: Wed Apr 20, 2016 7:02 pm
by g8dhe
The PMS3 unit only handles charging and control from the EHU.
To charge when on the move you need a Split Charge Relay, normally located under the bonnet, you should find a fairly heavy duty cable running from the SB +ve terminal via an in-line fuse to a relay and then on towards the LB where another in-line fuse should terminate on the +ve terminal. Its not uncommon for a really flat LB to blow one of the two fuses, in which case BOTH fuses need to be changed as they are in series and the second one will have been damaged. Normally the relay will be rated in excess of 40 Amps and the fuses as well, anything less and its life might be less than you would prefer!