Your testing setup sounds right.
Did you happen to measure volts while running the light? As voltage drops current rises.
Are you sure you read the rating for the correct light? 12.7A sounds like a reasonable current draw depending on size of the light. It would be worth checking.
I have looked into upgrading the motor. Hoping not to spend the dollars at the moment if I can.
Bought an M12000 for $100 that came off a service truck. Bugger all use but the mud had caked on around the end cap and corroded it away. All the internals are like new.
It also seems a...
The 4wd supacentre ones make a good base if they fit the bill. Shortened one of the single drawers for the back of my landcruiser 105 so i could still use the anchor point. Have attached a drop down fridge slide to one of them. Simple design.
Seem to be holding up well so far.
Look at where you are going to mount the dc dc. If you place it under the bonnet it will get hot, which will eventually damage the dc dc. Electrolytic caps don't like heat and degrade very quickly
The only one I could find that was rated to be mounted behind the grill was the redarc. This is a...