"NancyR" <nan...@nospam.net> wrote:
> One put his
> battery in my car & the result was the same - nothing, no click.

Then my money is on the main fuse (under the hood) having blown again.
First confirm it is blown. Then it will take some diagnostics to
figure out why. A wire is grounded that is not supposed to be, say.
Make sure the correct rating fuse is installed. The underhood fuse
cover should say what rating is needed. Should be 80 amps or 100 amps,
depending.