Parasitic Draw?

Truck has been struggling a little bit on first start, Volts on dash were about 12.1 in the morning. Had to jump it once after the fridge was on for the night.

Batteries and starter are about 1 year old, I disconnected all the batteries and tested them with the old school load tester.

All 4 were 12.4 volts, and all 4 held well at 10.6 volts under load, is this enough? No buldges, no smells.

I checked all grounds etc, and all seemed good.

I think alternator is probably original, so its probably 7 years old, million miles.

If I kill batteries overnight with kill switch, starts good at with gauge showing 12.4

So I am thinking something is draining the batteries, unless 10.6 under load isnt enough?

Best way to test alternator and system for draw?

Thanks

 

Havent had a chance to do some testing yet, but just went out to see if any hidden lights were on etc, and I found a relay pretty bloody hot in the fuse console.

Truck is off, so I pulled it out and let it cool down, popped it back in and she heated up pretty quickly.

Hoping its just a faulty relay, pulled it out for the night.

No markings on it, so not sure what its for.

 

Would removing the relay stop the draw on the batteries? I am pretty sure its for my steps (I am in a cab over argosy with powered steps)

So I can live without them in the short term.

 

Replaced relay and new one got hot, yah.

Its the electrical step motor circuit, anyone know whee to get a cheap step motor for an argosy?

Thanks all

 

Ok thanks, I have another truck with a bad motor, so I will pull the control module off that one.

I am assuming the control module is up under the steps near the motor?

Cheers