2007 Roadster Limited
A couple of months ago the weather started getting nice enough to drive the Roadster. So I started cleaning it up, checking fluids and driving it to the corner store occasionally.
The Car had been idle for a couple of weeks, but it was often idle for several weeks at a time.
So first I think the Fob has a dead battery, but after changing them I realize the Car battery is as dead as a rock. Now I bought this car last July, and the battery was replaced at that time by the owner. So I figured something was up. The battery would no longer hold a charge, so I replaced it.
When installing the new battery I noticed when making the connections it arced significantly. So I checked the cables, they are in fine shape, still in their holders with the secondary shielding in great shape. Infact, all the wires and cables look as if they have never been moved since they were installed. My first inclination was the Diodes in the Alternator had gone bad, and replaced it. But it wasn’t the problem.
The Battery seems as if it has a direct short to Ground?
Next, I came here and did some researching.
After following Pizza Guy’s troubleshooting guide (Battery Drain), Im afraid my situation is unique.
First off, when measuring the current flow from the Ground post to the cable I have 10+ amps.
I tried removing each fuse, including the ones behind the Drivers door. I removed the 2)50amp and 200amp fuses, and no change. I can lift the Alt cable and still no change. I can move the Cable to the Starter and it feels free (can’t see it completely) still has it’s secondary shielding that feels just fine, and still no change.
I have tried cycling all the switches, including the Ignition, and lights, but no change. I have reconnected the Battery proper, started the car and driven it, no codes or indicator lights, and still draining 10amps.
I would think if the Solenoid was the problem it would click or maybe even try to start when the Ignition was turned or the Battery was connected and disconnected? I have raised and lowered the Top, thinking maybe something was not located correctly, but it seems just fine, with no lights or bells when down or up.
Looking at the Starter location is why I haven’t tried removing it yet, but I fear I may need that tutorial as well.

I am just about out of ideas, the ones I do have seem far fetched, so I was hoping someone had a few for me. The weather has gotten wonderful for Driving, and I am eager to get this sorted out.
Thanks,