Check the manual. The charger's minus lead shouldn't be connected to battery terminal but rather to a dedicated post on the chassis right behind the battery.

Anyway, consider that the battery gets mainly charged on decelerations and braking, when the engine isn't under load. I have a V-meter permananently connected in the front 12V outlet and I can watch the charging happening very differently from what we have been used to see.

 

Edited 22 August, 20196 yr by agedbriar

Thanks for that. I just connected the charger to the terminals so I'll undo that and follow your advice.

Voltmeter this morning, engine off showed 12.2 volts.

Started engine, 14.6 volts.

Switched on lights (read that somewhere to get proper reading) and steady at 14.6 volts.

DaveK.