OK, here's another thought... (Or another wrench in the gears

)
You might want to check this, being as you said you replaced the starter relay, which means you jiggled the battery cables around....
A long time ago, I used to own a little 72' Datsun PickemUp.... It started having starter probs one day. I replaced the starter twice.... I replaced the relay.... I replaced the ignition switch.... STILL had probs (As in sometimes it would start and sometimes it wouldn't)
What it turned out to be was the positive battery cable. It looked
perfectly fine on the outside. Clamp and terminal were clean. Then, after beating my head on a wall for a couple of weeks, I got a brainstorm...I got a razor knife and sliced away a little bit of the insulation next to the battery clamp. You should have
seen the green crud fall out of it! Replaced the cable and never had another problem with it.
That is why, now, I make my own cables with the lugs
soldered onto the wire rather than crimped like store-bought. There are four advantages to this...
You can make the cables the
exact length you want/need...
I can make cables that are either #1 or #0 gauge... Not the puny 4 gauge junk they sell at the auto parts store....
I
KNOW I've got good solid connections at the lugs...
It's usually cheaper to make your own...
One more thing, and it's just a quirk with me... I like to have the positive cable red and the negative black. Most cables at auto part stores are mostly black it seems...
Good luck and Git er' done!!
