sounds like. either the starter has a loose connection on or around the case of it self, or you have a high resistance or open on the circuit that runs directly from the battery in the form of usuall an 8 gauge to 4 gauge red cabe that runs directly to the starter. if the solenoid is working fine like you suspect. if you can bang on the starter (with a hammer and and extention) and get it to spin over your problem is going to be a connection in the starter(which will then need replacement).
If that dosent help you try and move the positive lead going to the starter from the battery around, possibly breaking up some corrosion in the wire. if the starter then turns over from your moving the wire, your problem is most likely in that wire.
if all the other power accessories in your car are working fine the only ground problem issue i can think of would be in the ground straps going from the engine to the chasis. (close visual inspections of everything first lots of times payoff quick)
If that dosent help you try and move the positive lead going to the starter from the battery around, possibly breaking up some corrosion in the wire. if the starter then turns over from your moving the wire, your problem is most likely in that wire.
if all the other power accessories in your car are working fine the only ground problem issue i can think of would be in the ground straps going from the engine to the chasis. (close visual inspections of everything first lots of times payoff quick)
ok, for a quick test...take a jumper cable and make an engine to battery ground. If you have a bad ground problem, that should find that.
A starter draws a lot of amperage and if you have a messed up engine to chassis ground somewhere....it can just click.
doing some simple diagnostics will also help. you can get a cheap multimeter from harbor freight for like 3 bux...then you could do check voltage drops across wires and see where/if you're losing voltage at.
Checking for simple things before you drop some coin on a part can go a loonnnng way in saving some money.
g'luck
A starter draws a lot of amperage and if you have a messed up engine to chassis ground somewhere....it can just click.
doing some simple diagnostics will also help. you can get a cheap multimeter from harbor freight for like 3 bux...then you could do check voltage drops across wires and see where/if you're losing voltage at.
Checking for simple things before you drop some coin on a part can go a loonnnng way in saving some money.
g'luck