Late Westfalia split charge relay
Posted: 09 Aug 2021, 18:43
I'm refitting our Westfalia camper loom etc. and I've been trying to work out what does what etc. I've read all the threads on this topic I could find and due to my own limitations it's taken me a while to understand and I'd be grateful if someone could tell me I've got it right before I connect everything up and create a big disaster.
I've drawn out the relay connections based on what I've got in the van and diagrams I've found on the forum and elsewhere.
As I understand it...
(i) The Westfalia BBB charger charges the leisure battery directly through a red/yellow lead from the charger to the leisure battery when it's connected to the mains.
(ii) The BBB charger charges the starter battery through the two always connected 87 terminals on the relay with a red/black wire coming from the charger and a red/white wire heading off to the starter battery.
(iii) When the engine is running a low current wire (blue) on 85 from the alternator/ignition switch? connects 87 to 30 joining leisure and starter batteries and allowing the alternator to charge the leisure battery. The blue wire also connects to the fridge relay so it works off 12v when the engine is running.
Is that right? If I've not quite understood what's happening and when, it's maybe not so bad if I've actually got the connections right, so are my diagrams correct? Thanks so much for any help!
I've drawn out the relay connections based on what I've got in the van and diagrams I've found on the forum and elsewhere.
As I understand it...
(i) The Westfalia BBB charger charges the leisure battery directly through a red/yellow lead from the charger to the leisure battery when it's connected to the mains.
(ii) The BBB charger charges the starter battery through the two always connected 87 terminals on the relay with a red/black wire coming from the charger and a red/white wire heading off to the starter battery.
(iii) When the engine is running a low current wire (blue) on 85 from the alternator/ignition switch? connects 87 to 30 joining leisure and starter batteries and allowing the alternator to charge the leisure battery. The blue wire also connects to the fridge relay so it works off 12v when the engine is running.
Is that right? If I've not quite understood what's happening and when, it's maybe not so bad if I've actually got the connections right, so are my diagrams correct? Thanks so much for any help!