TORQUE CONVERTER CLUTCH (TCC) SOLENOID
AND RELAY
The TCC solenoid is only used on three-speed automatic
transmissions. The Powertrain Control Module
(PCM) operates the TCC solenoid by energizing
the TCC relay.
Circuit G50 from fuse 5 in the Power Distribution
Center (PDC) supplies voltage to the coil side of the
TCC relay. When the PCM provides a ground path on
circuit K54, the relay contacts close.
When the relay contacts close, they connect circuit
A14 from fuse 1 in the PDC with circuit T22. Circuit
T22 supplies battery voltage to the case grounded
TCC solenoid. Circuit K54 connects to PCM cavity
54.
HELPFUL INFORMATION
˛ In the RUN or START position, the ignition switch
connects circuit A1 from fuse 4 in the PDC to circuit
A21.
˛ Circuit A21 powers fuse 5 in the fuse block.
˛ Circuit G50 also connects to the engine data link
connector, Automatic Shut Down (ASD) relay, and
fuel pump relay.
so it looks like there are 3 fuses of interest all in the PDC by the battery (fuse 1, 4 and 5).
there is something else mentioned there which you'll have to check, they say that the same circuit which controls the t/c lock relay is the one that controls the upshift lamp on the dash - not sure if that means that the harness is different or if that circuit has a dual purpose (you could tell though if your upshift lamp lights up and your t/c does not lock it means you'll have to reroute circuit K54 that comes off pin 54 on the PCM to the relay)
UPSHIFT LAMP
On vehicles equipped with a manual transmission,
the PCM grounds the up-shift lamp on circuit K54.
Circuit K54 connects to cavity 54 of the PCM.
I looked at the diagram and seems that are both wired in, so if your upshift lamp was working before and now it also lights up that is your t/c solenoid lock command from the PCM - if your t/c does not lock it means the relay is not powered (since you already tested it with a jump wire if i understood correctly from your initial post).
hope this helps.