This weekend, when starting the coach I noticed the chassis batteries were a bit low. The alternator brought them up, but I decided to look at the shorepower charging system, which is the original (not digital) Heart Echo Charger.
This model has a single red LED for overtemp, rather than the new style green and red, so it's a bit hard to tell what is going on.
I checked the two fuses (one from house battery and one to chassis battery) and they are fine. I pulled the wire from the echo charger to the chassis battery and see 13.8 voits there so I think the EC is working, but not too sure about the amperage output.
In any case, here is the real issue. My chassis batteries are 12v and wired in parallel (+ to +, - to -) as I expected. However the charge lead from the echo charger is connected to the Negative battery terminal. THis seems wrong but I don't have the old style owners/installation manual. I would think the fuse would have blown, but it didn't.
In any case, I've temporarily moved the lead to the + side to see if the battery voltage increases. At the moment battery is at 12.3 V, but seems to be rising very slowly.
If anyone has the original owners manual, can you check the correct wiring? Also is there any test procedure?
Thanks
J