How do I hotwire fuel pump?

you stated pump kicks on put clutch in and no start so what would you hot wire [[and dont hotwire anything ]]]which causes more problems and in this case is probably pump not problem ----theirs a clutch safety to start in manual trans which that or ignition system problem such as failed starter --ignition switch --etc have vehicle for any possible trouble codes

USA?
park lockout failure for sure.
scan it,and check all fuses first.
lots of causes. this old.
bad cam belt,if has one. 7AFE, it does and slipped. oops must be fixed first ,not one belt ever lasted 26 years,. eva.
bad spark.
The PCM runs spark not you, not hotwired,
sure all starters made hotwire with easy as you just did.
PCM will not make spark if PRNDL switch fails and PARK and Neutral shows up as neutral not R- Reverse. or D or L. fail.
PCM runs the pump NOT you, if PCM spark fail it cuts all fuel injection and maybe pump too.
EFI relay pin 1 is E1 to ground body,that?
if the P/N switch fail the starter relay will be dead
60amp main fuse blown makes ST relay dead too.
No SHIFT lock wiring I am read the SM schematics to you here.
fuse good CIG-RAD fuse good, ecu-IG and STOP fuse good.
toyota schematics are joy to read, unlike trash from germans.
shift lock control switch not bad in shifter.
Shift lock cPU board not bad or shift lock solenoid not bad
the later unlocks the shifter.
the same CPU BOARD UNLOCKS THE KEY.
SEEN HERE

https://eautorepair.net/Marketing/Default.asp

if it wont start with the key only when hotwired my idea would go in the direction of the ignition barrel
hotwired start means its not the fuel pump because it runs
its possible the barrel isnt making the connection at the start position

Where is the inertia switch located at

Check your fusible links (wires that act like a fuse). The fusible links are located on the battery post on the starter, and some are located on the positive battery cable.

if the fuses and relays are good then have you check the dash switch,you may have to check the wiring(powers)from the pump back through the system until you find were you have lost power.

Does or did the check engine light come on? When you had the fuel pump hotwired did it or will it - start the motor and run? If yes to first question then have the codes read. Did you check all fuses and relays for the fuel pump.Check fuel pump pressure once you get the fuel pump working.And if you feal the spark is weak then replace the ignition coil, check distributor cap and rotter replace if nesessary.And there is a little discrepency in your add I do not know if I am dealing with a 91 or a 98 chevy? Good Luck and have a good XMASS.

the fuse should be under the left side of the hood if you are standing in front of the truck its going to be in the insterment panel with the relay and other things check that out and if the fuse is fine then check the wireing

Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...
 
also check the ignition switch and ignition module.

on the negitive battery cable there is also a small black wire this is you fuel ground make sure this had a good connection the the negitive side of the battery.