Thanks for help. Problem was a faulty 50A fuse next to starter battery. Solved.If everything else in the EBL is working, other than the linking relay, you might get away with fitting a new relay outside the box. What I am thinking is a normally open 70A relay with closing triggered by a D+ feed that would link the engine and leisure battery leads when the engine is running. Am I overlooking something important with this idea?
Thanks for help. Problem was a faulty 50A fuse next to starter battery. Solved.I'm aware the circuit goes via the Electrobloc, what I don't understand is you say the fridge has power when switched to 12 volt and the engine is running but no charge to leisure batteries?
That suggests the D+ signal is being received by the Electrobloc and unless there is a break in the circuit to the leisure batteries they should be receiving a charge.
Have you tried measuring the voltage at the leisure batteries with engine running, if so does it increase with engine running or not?
Thanks for help. Problem was a faulty 50A fuse next to starter battery. Solved.I'm aware the circuit goes via the Electrobloc, what I don't understand is you say the fridge has power when switched to 12 volt and the engine is running but no charge to leisure batteries?
That suggests the D+ signal is being received by the Electrobloc and unless there is a break in the circuit to the leisure batteries they should be receiving a charge.
Have you tried measuring the voltage at the leisure batteries with engine running, if so does it increase with engine running or not?
Thanks for help. Problem was a faulty 50A fuse next to starter battery. Solved.When I had an EBL the charge arrived from the engine battery through a big wire on the back and went on to the leisure battery by another big wire on the back. When the D+ signal was received by the EBL an internal relay linked the two. If the two are not at the same voltage when the engine is running then either the D+ signal is suspect or the relay may have stopped working.
View attachment 51492View attachment 51493