WIRING DIAGRAM SYMBOLS

1988 Jeep Cherokee

WIRING DIAGRAMS

How To Use The Wiring Diagrams

WIRING DIAGRAMS

INTRODUCTION

The wiring diagrams and technical service bulletins,

containing wiring diagram changes, are obtained from the domestic and import manufacturers. These are checked for accuracy and are all redrawn into a consistent format for easy use.

All diagrams are arranged with the front of the vehicle at the left side of the first page and the rear of the vehicle at the right side of the last page. Accessories are shown near the end of the diagram.

Components are shown in their approximate location on the vehicle. Due to the constantly increasing number of components on vehicles today, it is impossible to show exact locations.

In the past, when cars were simpler, diagrams were simpler. All components were connected by wires, and diagrams seldom exceeded 4 pages in length. Today some wiring diagrams require more than 16 pages. It would be impractical to expect a service technician to trace a wire from page 1 across every page to page 16.

Removing some of the wiring maze reduces eyestrain and time wasted searching across several pages. Today, the majority of diagrams now follow a much improved format, which permits space for internal switch details and connector shapes.

Any wires that don’t connect directly to their components are identified on the diagram to indicate where they go. There is a legend on the first page of each diagram, detailing component location. It refers you to sub-systems, using grid NUMBERS at the top and bottom of the page and grid LETTERS on each side. This grid system works in a manner similar to that of a road map.

HOW TO USE THE WIRING DIAGRAMS

4. On the first page of the diagram, you will find a listing
   of major electrical components or systems. Locate the specific
   component or system you wish to trace. A grid number and letter will
   follow the component’s name.

5. Use the grid NUMBERS (arranged horizontally across the top
   and bottom of each page) to find the page of the wiring diagram that
   contains the component you’re seeking. When you reach this page, use
   the grid LETTERS on the side of the page to determine the component’s
   vertical location.

6. Locate the circuit you need to service. The internals are
   shown for switches and relays to assist you in understanding how the
   circuit operates.

NOTE: In some of the newer wiring diagram articles in this

product, there is a Legend for the wiring diagrams that has been created to make locating components easier. For these articles, there will be a COMPONENT LOCATION MENU title in the article main menu. These articles will also have the original legend available on the first graphic.

TEMP SENS (GND)

_®

_{BATTERY (+)}

FUEL GAUGE (INST CLSTR)

Fig. 1: Identifying Tie-Off Symbols

4. If the wires are not drawn all the way to another
   component (across several pages), a reference will tell you their
   final destination.

5. Again, use the legend on the first page of the wiring
   diagram to determine the grid number and letter of the referenced
   component. You can then turn directly to it without tracing wires
   across several pages.

6. The symbols shown in Fig. 1 are called tie-offs. The first
   tie-off shown indicates that the circuit goes to the temperature
   sensor, and is also a ground circuit.

7. The second symbol indicates that the circuit goes to a
   battery positive parallel circuit. The third symbol leads to a
   particular component and the location is also given.

8. The lines shown in Fig. 2 are called options. Which path
   or option to take depends on what engine or systems the vehicle has.

Fig. 2: Identifying Option Symbols

COLOR ABBREVIATIONS IDENTIFICATION

COLOR ABBREVIATIONS

Color

Normal

Black BLK

Blue BLU

Brown BRN

Clear CLR

Dark Blue DK BLU

Dark Green DK GRN

Green GRN

Gray GRY

Light Blue LT BLU

Light Green LT GRN

Orange ORG

Pink PNK

Purple PPL

Red RED

Tan TAN

Optional

BLK

BLU

BRN

CLR

DK BU

. . DK GN

GRN

GRY

LT BU

.. LT GN

ORG

PNK

PPL

RED

TAN

Voilet VIO VI

White WHT WT

Yellow YEL YL

WIRING DIAGRAM SYMBOL IDENTIFICATION

NOTE: Standard wiring symbols are used on diagrams. The list below will help clarify any symbols that are not easily understood at a glance. Most components are labeled "Motor", "Switch" or "Relay" in addition to being drawn with the standard symbol.

WIRING DIAGRAM SYMBOLS

Views of the symbols used in the WIRING DIAGRAM articles are in the following graphics. See Figs. 3 through 25.

Fig. 3: Circuit Breaker

Fig. 4: Coil (Internal)

Fig. 5: Connector

Fig. 6: Diode (In-Line)

— ►] ’ DIODE (Internal)

Fig. 7: Diode (Internal)

Fig. 8: Diode (Light Emitting)

Fig. 10: Fuse

Fig. 9: Defogger Grid

Fig. 11: Fusible Link

Fig. 12: Ground

Fig. 13: Glow Plug Resistor (In-Line) or Mirror Heater

Fig. 14: Injector (Diesel) or Photocell (Gasoline)

Fig. 15: Internal Fuse, Thermal Limiter

Fig. 16: Lamp (Dual Element)

Fig. 17: Lamp (Single Element)

Fig. 18: Motor

■VWWW- RESISTOR (Internal)

Fig. 19: Resistor (Internal)

Fig. 19: Resistor (Internal)

Fig. 20: Sensor, Thermistor

Fig. 21: Solenoid

Fig. 22: Solid State Device, Transistor

Fig. 23: Switch (Internal)

Fig. 24: Two Pin Switch

Fig. 25: Variable Resistor or Potentiometer