Pull that metal box off and you will find some relays under it. They are the fuel pump relay and the coil resistor bypass relay.
Also involved in that circuit is the alternator. The basic idea is that the relays allow the fuel pump to run when the key is turned to start, or the alt is spinning. The pump shuts down when the engine stops in case of a wreck to prevent fire. They also bypass the resistor on the coil when the key is turned to start to give a bigger spark for starting. Then, the relays switch over to run power to the coil through the resistor when the motor is running.
_________________
95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good