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Wiring harness information specifically for 1999 Pickup, 5.0/5.7L engine.
Should be similar to 1998 but MAY not be exact. V6 will use different
Injector numbering. not sure on 7.4L what else is different.
Engine Controls Schematics
PCM/VCM Connector End Views
C100, C103, C107, C130, C200
Inline Harness Connector End View
Underhood Fuse Block Inline Harness
Connector End View
The following are wires that need connecting, UHFB Means UnderHood Fuse
Block.
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Power Connections |
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Fuse Size |
Device |
Connector |
Location |
Wire Color |
Note |
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20 AMP |
PCM Batt
12v+ |
UHFB |
G12 |
Orange |
Hot at ALL TIMES, also use this fuse to provide power
to Fuel Pump Relay. |
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20 AMP |
PCM, Injectors, Crank Sensor, Ign Module, Coil |
UHFB |
J8 |
Pink |
Ignition KEY Hot |
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10 AMP |
PCM |
C100 |
D8 |
Brown |
Ignition KEY Hot |
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20 AMP |
CAM Sensor (inside distributor), Oxygen Sensor
Heaters, EGR Valve, EVAP Purge & Vent Solenoids, Mass Airflow Sensor |
UHFB |
L8 |
Pink |
Ignition KEY Hot |
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10 AMP |
Transmissions |
C100 |
A2 |
Pink |
Ignition KEY Hot |
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OBD2 Port |
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Pin 16 Hot at ALL TIMES |
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OBD2 Port |
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Pin 4 & 5 - Ground |
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Misc Connections |
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Device |
Connector |
Location |
Wire Color |
Note |
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Check Engine Light |
C200 |
N |
BRN/WHT |
PCM Grounds this pin to turn on check engine light.
Wire other side of light bulb to Key 12v+. |
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Serial Data (Class 2) |
C100 |
B7 |
PPL |
Goes to OBD2 Diagnostic Port Pin 2 |
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Fuel Pump Relay Control |
UHFB |
B3 |
DK GRN/WHT |
PCM sends 12v+ to turn on Fuel Pump Relay |
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Brake Switch Signal |
C200 |
E |
PPL |
This wire needs 12v+ when brakes are NOT applied, no
power whe brakes ARE applied. |
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Vehicle Speed Signal |
C100 |
B5 |
DK GRN |
4000 pulse per mile square wave pulse, used by SOME
aftermarket speedos, some such as Autometer hook directly to speed sensor in
trans. |
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