GMC T-Series 1999, Owner'S Manual, Page: 257 / 344

yellow blue
6-71
Power is fed through these fuses to devices such as the
headlamp switch, ignition switch feed circuits and the
auxiliary brake pump (hydraulic brake vehicles).
Be sure to replace maxi
-
fuses with maxi
-
fuses of the
same rating. Do not use maxi
-
fuses of higher amperage
than those indicated on the maxi
-
fuse block.
Name Circuits/Circuit Breakers
Protected
ST/TURN/HAZ Stoplamp, Turn Signals/Hazard
Warning Flashers, Fuel, Ignition
Relay (Gasoline Engines)
IGN SW3 Air Conditioner, Axle, Chassis
INT/EXT
LIGHTS Parking Lamps, Dome Lamp,
Instrument Panel Lights
HEAD LAMP Headlamps, Daytime
Running Lamps
AUX WRG Auxiliary, Parking Brake
Name Circuits/Circuit Breakers
Protected
IGN SW1 Ignition Switch, Washer/Wiper,
Crank, Radio
HYD PUMP Hydraulic Brake, Brake
Pump Motor
ABS ABS Module
ELECT TRANS Ignition Relay (Diesel Engines)
PARK BRAKE Parking Brake Motor
BLOWER
HORN Blower, Horn, Cigarette
Lighter, Auxiliary
TRAILER ABS Trailer ABS System,
Trailer Stoplamps
PWR
WDO/LOCKS Power Windows, Power
Door Locks