Pontiac Fiero 1988 Service Manual page 1121

BACK UP UGHTS
(Continued from previous page)
B: BACK UP LIGHTS STAY ON
Disconnect connector C500. Put the Ignition
Switch in RUN and the Gear Shift in PARK or
NEUTRAL.
• If Back-Up Lights go off, check/repair LT
GRN (24) wire to switch for a short to Bat-
tery. If OK, adjust/replace the Gear Selector
Switch (for automatic) or the Back Up
Lights Switch (for manual).
• If Back Up Lights remain on, check the
bulbs, sockets, and LT GRN (24) wire for a
short to Battery.
CIRCUIT O P E R A T I O N
With the Ignition Switch in RUN, BULB
TEST, or START, voltage is applied through
the TURN B/U Fuse to the Gear Selector
Switch (with automatic transaxle), or to the
Back Up Lights Switch (with manual trans-
axle). Whenever the Gear Selector Lever is
shifted to REVERSE, the Gear Selector Switch
or the Back Up Lights Switch closes, providing
voltage to the Back Up Lights and causing the
Back Up Lights to light.