GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
GMC P42 Commercial Chassis
🢒
HVAC
🢒
HVAC Systems - Manual
🢒 Horn Component Views
Horn Component Views P42
Figure
1:
Forward Lamps Harness (Typical)
(1)
Lamp, Left Front Park and Turn Signal
(2)
C203
(3)
C200
(4)
C202
(5)
Horn, High Tone (F - Note)
(6)
Horn, Low Tone (A - Note)
(7)
Lamp, Left Front Sidemarker
(8)
Headlamp, Left
(9)
Headlamp, Right
(10)
Lamp, Right Front Sidemarker
(11)
Lamp, Right Front Park and Turn Signal
Figure
2:
IP Side of Engine Wiring -- All Engines (P42)
(1)
Data Link Connector (DLC)
(2)
Headlamps Dimmer Switch
(3)
Brake Transmission Shift Interlock (BTSI) Solenoid
(4)
Brake Transmission Shift Interlock (BTSI) Relay
(5)
Horn Relay
(6)
Daytime Running Lamps (DRL) Relay
(7)
C210
(8)
C211
(9)
Torque Converter Clutch (TCC) and Stoplamps Switch
(10)
Ignition Switch
(11)
C1
(12)
C2
(13)
C1
(14)
C2
(15)
Turn Signal Switch Connector
(16)
Crank Fuse
Horn Component Views P32
Figure
1:
Engine Wiring Harness to Dash and Steering Column
(1)
Turn Signal Switch Connector
(2)
Headlamps Dimmer Switch
(3)
Data Link Connector (DLC)
(4)
Powertrain Control Module (Diesel)
(5)
Ignition Switch
(6)
Brake Transmission Shift Interlock (BTSI) Solenoid
(7)
Daytime Running Lamps (DRL) Relay
(7)
Daytime Running Lamps (DRL) Relay
(8)
Horn Relay
(8)
Horn Relay
(9)
Brake Transmission Shift Interlock (BTSI) Relay
(10)
Fan Control Relay
Figure
2:
Steering Wheel Horn Switch
(1)
Steering Wheel (Horn) Contact