DODGE RAM 1999 Service Repair Manual

ELE C TR IC AL C O M PO NEN T L O CATO R

1999 D odge P ic ku p R 1500
1999 ELECTRICAL COMPONENT LOCATION
Chrysler Motors Electrical Component Location
Dodge; Ram Pickup
SAFETY PRECAUTION
WARNING: When working on vehicles equipped with Supplemental Restraint
System (SRS), never apply electrical voltage to the system.
This could cause the SRS (air bag) to be deployed.
BUZZERS, RELAYS & TIMERS









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Component Component Location








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A/C Compressor Clutch Relay On power distribution center.
Automatic Shut Down Relay On power distribution center.
Blower Motor Relay On power distribution center.
Central Timer Module Left side of dash, inboard of
steering column opening.
Combination Flasher Left side of dash, on
junction block.
Engine Starter Motor Relay On power distribution center.
Fog Lamp Relay On power distribution center.
Fuel Heater Relay (Diesel) On power distribution center.
Fuel Pump Relay On power distribution center.
Horn Relay On power distribution center.
Intake Air Heater Relay No. 1
(Diesel) On left inner fender, below
left battery.
Intake Air Heater Relay No. 2
(Diesel) On left inner fender, below
left battery.
Quad High Beam Relay On power distribution center.
Radio Choke Relay Behind center of dash, on
support.
Security Relay On power distribution center.
Trailer Tow Relay On power distribution center.
Transmission Control Relay On power distribution center.
Wiper Motor Relay On power distribution center.









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CIRCUIT PROTECTION DEVICES









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Component Component Location








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Circuit Breakers In junction block.
Junction Block Left end of dash.
Power Distribution Center In engine compartment, on left
inner fender panel, near
battery.









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CONTROL UNITS









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Component Component Location








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Air Bag Control Module Behind lower center of dash.
Controller Anti-Lock Brake (4WABS) Engine compartment, mounted on\
top of hydraulic control unit.
Controller Anti-Lock Brake (RWAL) In engine compartment, on left\
front inner fender.
Daytime Running Lamp (DRL) Module In engine compartment, on left\
inner fender panel.
Engine Control Module (Diesel) On left side of engine, behind\
fuel filter.
Fuel Pump Module Top of fuel tank.
Integrated Electronic Module Left side of dash, inboard of
steering column opening.
Powertrain Control Module (PCM) In engine compartment, on
right side of firewall.
Seat Belt Control Module Under front seat center
cushion.









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MOTORS









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Component Component Location








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Blower Motor Behind right side of dash.
Fuel Injection Pump (Diesel) On left side of engine, on
rear of timing gear housing.
Fuel Transfer Pump (Diesel) On left side of engine, below
and rearward of fuel filter.

Idle Air Control Motor (3.9L) On throttle body.

Idle Air Control Motor (5.2L) On throttle body.

Idle Air Control Motor (5.9L) On throttle body.
Idle Air Control Motor (8.0L) On throttle body.

Leak Detection Pump Right front inner fender.
Windshield Washer Pump In bottom of windshield washer
reservoir.
Windshield Wiper Motor In engine compartment, on
center of firewall.









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SENDING UNITS & SENSORS









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Component Component Location








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Accelerator Pedal Position
Sensor (Diesel) At left front of engine, below\
cable/lever/linkage cover.
Ambient Temperature Sensor Underside of hood panel, near
latch striker.
Battery Temperature Sensor Below battery tray.
Camshaft Position Sensor (3.9L) Inside distributor.
Camshaft Position Sensor (5.2L) Inside distributor.
Camshaft Position Sensor (5.9L) Inside distributor.
Camshaft Position Sensor (8.0L) In timing chain case/cover, on
left front side of engine.

Crankshaft Position Sensor
(3.9L) Right rear of engine block.

Crankshaft Position Sensor
(5.2L) Right rear of engine block.

Crankshaft Position Sensor
(5.9L) Right rear of engine block.
Crankshaft Position Sensor
(8.0L) On right lower side of

cylinder block, above oil
pan rail.
Engine Coolant Temperature
Sensor (Diesel) On front of cylinder head,
near thermostat housing.
Engine Coolant Temperature
Sensor (3.9L) In water jacket, at front of
intake manifold.