88 5KCSTQ Electrical Mystery!

[Gurdev Sethi <gsethi@ziplink.net>]

Hi all,

I have been having starting problems.
88 5kCSTQ 155kmiles  Warm/dry weather

Battery is fully charged from AC charger. When key is turned noise is heard
from
footwell area and starter (It think) The car does not turn over. The
mystery is when
I put my jumper pack (portable 12v jump starter) connected to the postive
jumper term in front and connect neg to ground and turn 
the key the car starts and runs fine.

The moment the ignition is turned off the car will not restart (with jumper
pack help) and will just click.

Any help would be great as I am so very tired of jumping the damn thing.

Thanks
Gurdev