Also...
On a '90 that has the (popular)
secondaries deleted modification, whether there is a POWER key or not or whether it is turned on or not the
FULL ENGINE POWER will be illuminated on the center display
status screen (above the radio, etc.) IF the the switch has been modified (per Mike 100s post).
WARNING:
IF the chip has been modified so that the Secondary Port Throttles have been permanently "turned on", then the "NORMAL vs. FULL POWER (key switch) MUST always be in FULL POWER mode. Otherwise a serious/dagerous lean condition will exist and can result in burnt valves. So, to be safe, the wires going to the switch are often jumpered together (per Mike 100s post).