You can take the thhottle body air intake hose off and pour a small amount of gas down the throttle body and see if it starts. It wont run long but if it starts and goes back dead then its most likely a fuel pump problem. If that doesnt do anything get someone to spin the engine and take a spark plug wire off and put a philips screwdriver in the plug wire and hold it close to metal and see if you have a spark while the engine is spinning over. If not it is a firing problem and most likely the crankshaft position sensor and I would recommend getting that at the dealership rather than getting one at a parts house. Hope this helps!!
The pic you show doesn't match the 97 JGC PDC. ??Here is the dia from the FSM.
F#20 is the fuse that protects the PCM. The yellow plastic piece that is in the pic is F#17, which goes to the transmission solenoids.
The PCM provides 5v to all the sensors, transmission, TPS, MAP, 02s, Cam, Crank, Temp sensors. It usually a problem with the 02 leads, getting worn through by the drive shaft causing a short. It can also be a wire that has worn though due to a sensor that has been re routed incorrectly. Check around the exhaust and bell housing. If you keep replacing the fuse without first relieving the short, you could fry the PCM.