89 Trooper starter woes

My 89 Trooper refused to start the other day.
So... I pulled the starter, tested it. Solenoid is dead. Go to the auto parts place, get a rebuilt starter. Put it in. Turn the key, no start.
Run a lead from the battery to the solenoid; starter turns over. Pull relay, test relay. Relay is bad. Go to the auto parts place, get a relay. Put it in. Turn the key, no start.
WTF? Get the meter out, relay tests good. Test voltages to relay, all test good.
Pull lead from starter solenoid, put meter on it. Turn key, no juice.
Look in manual. There is a straight shot from relay to solenoid; no fuses or fusible links. Check all fuses and links anyway; all good.
But still no juice at the solenoid lead. Before I just wire it straight from the relay, does anyone know how the wire from the relay to the solenoid runs?
Any ideas on what it could be? My money is on corroded/fried wiring...
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