GMC Forward Control P3500 (1985-1999) horn relay Wiring diagrams
This page contains all the electrical diagrams for the component. horn relay, in which he is found in the car GMC Forward Control P3500 (1985-1999). You can view various wiring diagrams where this component is used, as well as go to more detailed diagrams to see the complete connection and interaction in the system. All diagrams have links to quickly jump to the corresponding section with the component for easy viewing..
horn relay wiring diagram (2 of 11)
Go to component -> Horn circuit, commercial & motorhome chassis -> HORN RELAY
horn relay wiring diagram (3 of 11)
Go to component -> Horn circuit, motor home chassis -> HORN RELAY
horn relay wiring diagram (4 of 11)
A/C COMPRESSOR RELAY
ACCESSORY JUNCTION BLOCK (LEFT INTERIOR BULKHEAD, NEAR RELAY BRACKET)
AUXILIARY ENGINE COOLANT FAN RELAY (DIESEL ONLY) GLOW PLUG CONTROLLER (DIESEL)
BATT BUS
BATTERY
BATTERY JUNCTION BLOCK (LEFT SIDE OF ENGINE BULKHEAD)
BLK WIRE
BLU WIRE
DATA LINK CONNECTOR
DIESEL
DOME LAMP (PROVISIONS FOR)
ECM-BAT FUSE 6
ELECTRONIC BRAKE CONTROL MODULE
ENG BAT FUSE 10
FUEL PUMP RELAY VEHICLE CONTROL MODULE
FUSIBLE LINK (10 GA-RUST)
FUSIBLE LINK (12 GA-
FUSIBLE LINK (14 GA-
FUSIBLE LINK (16 GA-
FUSIBLE LINK (18 GA-
GAS
GENERATOR
GRY WIRE
HAZARD LAMP FLASHER
HEADLAMPS SWITCH
HORN DM FUSE 3
HORN RELAY
I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER)
ORG/ WIRE
OTHERS
POWERTRAIN CONTROL MODULE
PWR BUS
PWR CIRCUIT BREAKER
RED WIRE
REMOTE BATTERY ACCESS TERMINAL BLOCK (REAR OF RIGHT RADIATOR CORE SUPPORT PANEL)
SEAT BELT ALARM MODULE
SECONDARY BATTERY (DIESEL ONLY)
STARTER RELAY
STARTER SOLENOID
STOP-HAZ FUSE 11
STUD
TAIL LPS FUSE 7
TO IGNITION SWITCH (DIAGRAM 2 OF 4)
TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH
TRANSMISSION CONTROL MODULE (A/T ONLY) FUEL PUMP RELAY
W/DELUXE SCHOOL BUS OPTION
Go to component -> Power distribution circuit, commercial chassis (1 of 4) -> HORN RELAY
horn relay wiring diagram (5 of 11)
1996 VFTC
A/C COMPRESSOR CLUTCH RELAY
AUXILIARY ENGINE COOLANT FAN RELAY (DIESEL ONLY)
BATT BUS
BATTERY
BATTERY JUNCTION BLOCK (LEFT SIDE OF ENGINE BULKHEAD, ABOVE RELAY BRACKET)
BLK WIRE
DATA LINK CONNECTOR (DLC)
DIESEL
DOME LAMP (PROVISIONS FOR)
ECM BAT FUSE
ENG-BAT FUSE
FUEL PUMP RELAY FUEL PUMP SWITCH, ENGINE OIL PRESSURE GAUGE SENSOR
FUSIBLE LINK (10 GA-RUST)
FUSIBLE LINK (16 GA-
FUSIBLE LINK 12 GA. BLUE
FUSIBLE LINK 18 GA. BLUE
FUSIBLE LINK 18 GA. RUST
GAS
GENERATOR (RIGHT FRONT OF ENGINE)
GLOW PLUG CONTROL SWITCH (DIESEL ONLY)
GRY WIRE
HAZARD WARNING LAMPS FLASHER
HEADLAMPS SWITCH
HORN RELAY
HORN/ DM FUSE TAIL LPS FUSE
I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER) (BODY BUILDER INSTALLED)
IGNITION SWITCH
ORG/ WIRE
PWR BUS
PWR FUSE
RED WIRE
REMOTE BATTERY ACCESS TERMINAL BLOCK (REAR OF RIGHT RADIATOR CORE SUPPORT PANEL)
SEAT BELT ALARM
SECONDARY BATTERY (DIESEL ONLY)
STARTER RELAY
STARTER SOLENOID (AT STARTER, LOWER RIGHT SIDE OF ENGINE)
STOP/ HAZ FUSE
STUD
TO HEADLAMPS SWITCH (CAVITY E)
TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH
TRANSMISSION CONTROL MODULE (A/T ONLY)
VEHICLE CONTROL MODULE (VCM)
W/DELUXE SCHOOL BUS
Go to component -> Power distribution circuit, commercial chassis (1 of 5) -> HORN RELAY
horn relay wiring diagram (6 of 11)
ACC RADIO FUSE
ACCY
BATTERY JUNCTION BLOCK
BLK WIRE
BODY BUILDER'S DAYTIME RUNNING LAMPS JUNCTION BLOCK RELAY
BRAKE WARNING SYSTEM (WARNING SYSTEMS)
BRN WIRE
BULB TEST
CLUTCH
DAYTIME RUNNING LAMPS MODULE WIPER MOTOR
DK GRN WIRE
ECM BAT FUSE
FROM PANEL DIMMER SWITCH
FROM PARK BRAKE WARNING SWITCH
FUEL CYCLE MODULE DAYTIME RUNNING LAMPS RELAY
FUEL PUMP RELAY, FUEL PUMP/ OIL PRESSURE SWITCH
FUSE BLOCK
FUSE BLOCK, GLOW PLUG CONTROLLER
FUSIBLE
FUSIBLE LINK E
GAGES FUSE SHUNT
GENERATOR
GRY WIRE
HAZARD FLASHER
HEADLIGHT SWITCH ASSEMBLY
HORN RELAY
HORN/DM TAIL LPS FUSE FUSE
HTR FUSE
IGNITION SWITCH
INSTR LPS FUSE
INSTRUMENT TRANSMISSION CLUSTER RANGE INDICATOR LAMP
LINK A
LINK B
LINK C
LINK D
LINK F
LOCK
LOCK OFF
OFF
ORG/ WIRE
PCM
PNK WIRE
PNK/WHT WIRE
POWERTRAIN CONTROL MODULE
PPL
RED WIRE
RIGHT FRONT BATTERY LEFT REAR BATTERY
RUN WIRE
SHUNT
STARTER RELAY
STARTER SOLENOID
STOP- HZ FUSE
STOPLAMP SWITCH
SWITCH
TAN/WHT WIRE
TO GLOW PLUG CONTROLLER
W/ AUTO TRANSMISSION
W/ MANUAL TRANSMISSION ONLY PPL
WHT WIRE
WIPER FUSE
WIPER SWITCH
Go to component -> Power distribution circuit, commercial chassis (diesel) (1 of 2) -> HORN RELAY
horn relay wiring diagram (7 of 11)
1995 VFTC
ACCY
ACCY BULB TEST LOCK OFF
AUDIO ALARM MODULE CONVENIENCE CENTER
BATTERY
BATTERY JUNCTION BLOCK
BLK WIRE
BLK/RED WIRE
BLOWER SWITCH RIGHT POWER WINDOW SWITCH
BRN WIRE
BULB TEST
CONVENIENCE CENTER
DAYTIME RUNNING LAMPS RELAY
DK BLU WIRE
DK GRN WIRE
DRL FUSE PWR ACC CIRCUIT BREAKER
FRONT DOME LAMP RADIO
FUEL PUMP OIL PRESSURE SWITCH TURN SIGNAL FLASHER BACKUP LAMP SWITCH
FUEL PUMP RELAY POWERTRAIN CONTROL MODULE (PCM)
FUEL PUMP STOP-HZ FUSE FUSE
FUSE BLOCK
FUSIBLE
FUSIBLE LINK
GENERATOR
GRY WIRE
HEADLIGHT SWITCH
HEATER RADIO CONTROL LAMP
HIGH BLOWER RELAY
HORN RELAY
HORN/DM TAIL LPS FUSE FUSE SHUNT
IGNITION COIL
IGNITION SWITCH
INSTR LPS FUSE
INSTRUMENT CLUSTER
LEFT DOOR LOCK SWITCH DOOR LOCK RELAY
LEFT POWER WINDOW SWITCH
LIGHT SWITCH
LINK
LOCK OFF
NCA WIRE
ORG/ WIRE
ORG/BLK WIRE
PNK WIRE
PPL
PROVISIONS FOR REAR DOME LAMP
PWR WDO CIRCUIT BREAKER HTR A/C FUSE
RADIO WINDSHIELD WIPER/ WASHER SWITCH WINDSHIELD WIPER MOTOR MODULE
RED WIRE
RIGHT DOOR LOCK SWITCH
RUN WIRE
STARTER SOLENOID
STOPLAMP SWITCH HAZARD FLASHER AUDIO ALARM MODULE
TO ECM I, GAGES, TRANS FUSES AND
TRANSMISSION RANGE INDICATOR LAMP
TURN-B/U FUSE RADIO WIPER FUSE FUSE
W/ A/C
W/ A/C W/O A/C
W/O A/C
WHT WIRE
YEL WIRE
Go to component -> Power distribution circuit, cutaway chassis (1 of 2) -> HORN RELAY
horn relay wiring diagram (8 of 11)
ACC RADIO FUSE
ACCY
ACCY BULB TEST LOCK
ACCY BULB TEST LOCK OFF
AUTO APPLY PARK BRAKE
AUX CB
AUX CIRCUIT BREAKER HTR FUSE
AUXILIARY COOLING FAN RELAY
AUXILIARY COOLING FAN RELAY DAYTIME RUNNING LAMPS
BATTERY
BATTERY JUNCTION BLOCK
BLK WIRE
BLK/RED WIRE
BRAKE WARNING ALARM BUZZER
BRN WIRE
BULB TEST
DAYTIME RUNNING LAMPS RELAY DAYTIME RUNNING LAMPS MODULE
DK GRN WIRE
FROM PANEL DIMMER SWITCH ASSEMBLY (INTERIOR LIGHTS SYSTEM)
FUEL PUMP RELAY FUEL PUMP OIL PRESSURE SWITCH HAZARD FLASHER
FUSE BLOCK
FUSIBLE
FUSIBLE LINK
GENERATOR
GRY WIRE
HEADLIGHT SWITCH
HORN RELAY
HORN/DM
I/P CLUSTER BRAKE PRESSURE WARNING SWITCH
IGNITION SWITCH
INSTRUMENT CLUSTER
LINK
LOCK OFF
LPS BUS GAGES FUSE INSTR-LPS FUSE
OFF
ORG/ WIRE
PARK BRAKE WARNING SWITCH
PCM
PNK WIRE
PNK/ WHT WIRE
PNK/BLK WIRE
PNK/WHT WIRE
POWERTRAIN CONTROL MODULE
PPL
PWR ECM-BAT CIRCUIT BREAKER FUSE
RED WIRE
RELAY
RUN WIRE
SHUNT
STARTER MOTOR
STOP- HZ FUSE
STOPLAMP SWITCH
TAIL LPS FUSE FUSE
TAN/WHT WIRE
TO ALT, ECM-CRNK, TURN-B/U, TRANS, INJ FUSES AND IGNITION COIL
TRANSMISSION POSITION INDICATOR LAMP
WHT WIRE
WINDSHIELD WIPER MOTOR WIPER SWITCH MODULE
WIPER FUSE
YEL WIRE
Go to component -> Power distribution circuit, motor home chassis (1 of 2) -> HORN RELAY
horn relay wiring diagram (9 of 11)
ACCY
ACCY BULB TEST LOCK
AUDIO ALARM MODULE
AUTO APPLY PARK BRAKE
AUX
AUX CIRCUIT BREAKER
AUXILIARY COOLING FAN RELAY
BATTERY
BATTERY JUNCTION BLOCK
BLK WIRE
BLK/RED WIRE
BRAKE PRESSURE WARNING SWITCH
BRN WIRE
BRN/WHT WIRE
BULB TEST
DAYTIME RUNNING LAMPS AUXILIARY COOLING FAN RELAY
DAYTIME RUNNING LAMPS MODULE DAYTIME RUNNING LAMPS RELAY
DK GRN WIRE
DOME LAMP
ECM-BAT FUSE ACC-RADIO FUSE
FROM PANEL DIMMER SWITCH ASSEMBLY (INTERIOR LIGHTS SYSTEM)
FUEL PUMP OIL PRESSURE SWITCH FUEL PUMP RELAY POWERTRAIN CONTROL MODULE
FUSE BLOCK
FUSIBLE
FUSIBLE LINK
GAGES FUSE
GENERATOR
GRY WIRE
HAZARD FLASHER
HEADLIGHT SWITCH ASSEMBLY
HORN RELAY
HTR FUSE
I/P CLUSTER
IGNITION SWITCH
INSTR-LPS LPS BUS FUSE
LINK
LOCK
LOCK OFF
OFF
ORG/ WIRE
PARK BRAKE WARNING SWITCH
PCM
PNK WIRE
PNK/ WHT WIRE
PPL
PWR CIRCUIT BREAKER
RED WIRE
RELAY
RUN WIRE
SHUNT
STARTER MOTOR
STOP- HZ FUSE
STOPLAMP SWITCH
TAIL LPS FUSE HORN/DM FUSE
TAN/WHT WIRE
TO ALT, ECM-CRANK, TURN-B/U, TRANS, INJECTOR FUSES AND IGNITION COIL
TRANSMISSION INSTRUMENT AUDIO POSITION CLUSTER ALARM INDICATOR MODULE LAMP
WHT PNK/ WIRE
WHT WIRE
WIPER FUSE
WIPER SWITCH
Go to component -> Power distribution circuit, motorhome chassis (1 of 2) -> HORN RELAY
horn relay wiring diagram (10 of 11)
1996 VFTC
6.5L VIN F
6.5L VIN F 7.4L VIN J
7.4L VIN J (L29), 6.5L VIN F (L65) ENGINES ONLY
7.4L VIN N
A/C COMPRESSOR CONTROL RELAY
BATTERY
BATTERY JUNCTION BLOCK (ON FORWARD LEFT SIDE OF THE BULKHEAD)
BLANK FUSE
BLK WIRE
BUSS BAR
DATA LINK CONNECTOR (DLC)
DIESEL ONLY
DOME LAMP
ENG-BAT FUSE
FAN CONTROL RELAY
FUEL PUMP RELAY
FUSIBLE LINK (10 GA-RUST)
FUSIBLE LINK (14 GA-
FUSIBLE LINK (16 GA-
FUSIBLE LINK 12 GA. BLUE
FUSIBLE LINK 18 GA. BLUE
GENERATOR (ON RIGHT FRONT OF ENGINE)
GLOW PLUG CONTROL RELAY
HAZARD LAMPS FLASHER
HEADLAMPS SWITCH
HORN RELAY
HORN- DM FUSE
I/P FUSE BLOCK (MOUNTED ON THE I/P)
IGNITION SWITCH
ONLY
ORG/ WIRE
POWERTRAIN CONTROL MODULE (PCM)
POWERTRAIN CONTROL MODULE (PCM) VEHICLE CONTROL MODULE (VCM)
PWR CIRCUIT BREAKER
RED WIRE
SEAT BELTS/ LAMPS ALARM MODULE
SECONDARY BATTERY (DIESEL ONLY)
STARTER MOTOR (ON RIGHT REAR SIDE OF ENGINE)
STARTER RELAY
STOP- HAZ FUSE ECM- BAT FUSE
TAIL LAMPS FUSE
TO HEADLAMPS SWITCH (CAVITY E)
TORQUE CONVERTER CLUTCH (TCC), STOPLAMPS SWITCH
Go to component -> Power distribution circuit, motor home chassis (1 of 5) -> HORN RELAY
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