Electrical Help Please

inertia said
Coupla things.
The jobber was right, you can't get an accurate test on a dead battery, it needs to be fully charged before testing, and I'm not sure if a trickle charger could charge a dead battery sufficiently.
They may have wanted to "charge" it properly first, we would.
Hydrometer test prob not.
If you can, charge it properly overnite, - take it back and tell them it's got all the charge it'll take, load test it . .
jmo

The battery wasn't dead. I was starting the car with it every time I went somewhere else. The Battery Tender goes into "float" mode when it gets the battery fully charged to prevent it from over charging. The light was solid green meaning it was fully charged when I left the house. I thought just driving 3 miles it would still be fully charged or close to it. I guess I'll take it out of the car and take it back down there for a load test after it gets back to fully charged again with the Battery Tender.

413 said
With battery in the trunk the vehicle needs a large ground cable from the engine to the frame/body. Does it have one?

Yes. Actually there are several grounds all over this car. The guy who built it was making sure EVERYTHING was grounded. The alternator has it's own ground from the case to the fender, etc. all over the car.