Trunk Mount Batt. Opinions needed

crackedback said

Here is a nice clean compact. Battery right on the other side of the plate.

View attachment 1715597726

I've never had one of the ford relays fail in 40+ years.

There are valid reasons to wire a car like the OP schematic.

Pick your way to skin the cat.

Click to expand...

Yep.

And as I tried to say, have, and will try to say, without voltage measurements that might show up a voltage drop problem or even a bad battery or starter, we are just "shooting in the dark." Not even laser sights do you any good if there's nothing there to hit.

One possibility, tho, is today's low quality parts. And make sure the "Ford" solenoid is not actually a continuous duty one, which has a much lower contact rating.