Electrical System - Dodge D250 1990 Service Manual

Electrical System
DODGETurbo Diesel
Electrical System
Page 8-1
Section 8
Contents
Subject Page
Electrical System Description/Operation , . 8-2
Starting Motor 8-2
Alternator ... 8-3
Intake Manifold Heater System 8-4
Message Center and Run Circuit — . . . . . — . — 8-5
Electrical System Specifications — — — . . . . . . — • •. 8-6
Diagnosing Electrical Malfunctions 8-6
Starting Motor . . — . . . — — . — 8-6
Engine Does Not Crank — 8-6
Engine Cranking Speed Too Slow 8-8
Alternator 8-8
Abnormal Ammeter Operation . . . . . — — . . . . . — 8-9
Switch On, Negative (-) on Ammeter, Engine Running. — 8-9
Abnormal Charging System Operation 8-9
Fuel Shut off Valve -Check , 8-10
OH Pressure Switch and Temperature Sensor 8-10
Oil Pressure Switch/Sending Unit - Check
— — . . . . . . . . . . . . . . .
8-11
Coolant Temperature Sensor-Check — . . . — . . . 8-11
Coolant Heater - Check 8-11
Engine Electrical System Replacement Procedures — 8-12
Sterling Motor - Replacement
— . . . . . . . . . . —
8-12
Alternator - Replacement — . . . . 8-12
Electric Fuel Shut Off Valve - Replacement 8-14
Oil Pressure Switch - Replacement — . — 8-14
Oil Pressure Switch/Sending Unit Socket 8-15
Temperature Sensor - Replacement 8-15
Thermistor - Replacement . . — 8-16
Fuel Heater - Replacement 8-17
Engine Block Water Heater-Replacement — . . . . . . . . . . . . . . . 8-19
Intake Manifold Heater - Replacement
— . . . . . . . . . . . . . .
8-20
Remove 8-20
Install 8-21
Intake Manifold Heater Controls - Check 8-21
Operating Temperature — 8-21
Battery Voltage - Check 8-21
Thermistor - Check 8-22
Preheat/Postheat Cycle - Check 8-23
Intake Manifold Heater - Check 8-24
Temperature/Cycle Time Chart of Normal Operation 8-24
Specifications 8-25