Viper has been on a battery tender sans a few power outages. Doors won't unlock, fobs not working etc....

I hooked up a battery charger to the positive post inside the fuse panel under the hood, negative to aluminum on the engine.

Put new batteries in both fobs.

Still not working.

Tried manual key in the fob to access the hatch...Hatch still will not open with either the charger on the front post or the battery tender that's hooked directly to the battery. I don't hear the hatch, latch solenoid firing at all...

I'm stumped.

Any advice is greatly appreciated.

-K