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Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams

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Page 1: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Wiring Diagrams Wiring Diagrams Wiring Diagrams

Wiring Diagrams Wiring Diagrams Wiring Diagrams

Wiring Diagrams Wiring Diagrams Wiring Diagrams

Wiring Diagrams Wiring Diagrams Wiring Diagrams

Wiring Diagrams

Page 2: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Schematics

Wiring Diagrams or Schematics use a symbolic language

Understand the symbols and the diagrams will talk to you

What it can tell you is how and where to test the system

Page 3: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Listen to the Diagram!

Wiring Diagrams explain how a circuit works

All electrical circuits need Power (positive voltage), conductors, controls, loads.

To understand how a circuit works you must trace powerflow through the conductors, controls, and loads.

Page 4: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Power at the top!

Positive voltage is often called power.

Positive voltage usually originates in the top and left side of the diagram.

Ground is usually found at the bottom and right side of the diagram.

Page 5: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Power(Positive Voltage)

Ground(Negative Voltage)

Page 6: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

How many volts?

How many volts?

How many volts?

Page 7: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Understand the Symbols

Wiring diagrams contain lots of information

Pay attention to the little details!

Page 8: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Wires cross with NO electrical contact

Wires cross with soldered splice, will have electrical contact

Page 9: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

What does this dashed line mean?

Page 10: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

A dashed (or dotted) line can indicate there are other devices not shown in this picture

To keep the diagram simple, the other electrical components are not shown

The schematic says a 40 amp fuse is in the fuse/relay box. The fuse should always have power to it. The dotted line means there are other items in this fuse/relay box.

Page 11: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

The Engine Compartment Fuse/Relay Box has other wires, fuses etc.

The entire Blower Motor Switch is shown in this schematic

If I wanted to test the blower fuse I would not be surprised to find other fuses in this box

To find this switch I would look for a switch with four wires.

Page 12: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

How many wires go to this relay?

How many wires to the stoplight module?

Page 13: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

More Dashed Lines

A dashed or dotted line can mean there is more than is shown on the page…..

…..Or there are other wires hooked to the circuit, but not shown in the diagram

…..Or what controls a switch.

Page 14: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

A dashed or dotted line can mean there is more than is shown on the page

Page 15: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Dashed box means the entire Turn/Hazard Switch is not shown

Terminal Pins A11-A17 are shown but not pins A1-A10

Page 16: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

A dashed line can indicate there are other wires common to the circuit, but not shown in the diagram

Page 17: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

This splice has five wires in common

(parallel circuits)

This splice has other wires, in parallel, that are not shown in this diagram

Page 18: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

The dotted line means there are other circuits sharing this ground

Page 19: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

A dashed line indicatesswitches are linked

Page 20: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Parking lamp and Headlamp switches are “ganged” together as indicated by the dashed line

Page 21: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Parking lamp and Headlamp switches are “ganged” together as indicated by the dashed line

Page 22: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Parking lamp and Headlamp switches are “ganged” together as indicated by the dashed line

Page 23: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Other switches inside the headlamp switch operate independently

Parking lamp and Headlamp switches are “ganged” together as indicated by the dashed line

Page 24: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Other switches inside the headlamp switch operate independently

Parking lamp and Headlamp switches are “ganged” together as indicated by the dashed line

Page 25: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

When this coil turns ON…

…this switch will move

This switch is moved by Temperature

This switch is moved by Pressure

Page 26: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring
Page 27: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

What does this dotted line mean?

What does this dotted line mean?

What does this dotted line mean?

What does this dotted line mean?

What does this dotted line mean?

What does this dotted line mean?

What does this dotted line mean?

Page 28: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Details on Switches

Page 29: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Draw a continuity block

Page 30: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Wire Details

Schematics will often indicate…

….wire color

….wire gauge size

….circuit code

Page 31: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Wire Color

Wire Gauge

Circuit Code

Page 32: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Wire Gauge

4 12 14 16 18 20

???????

4!

19.0 3.0 2.0 1.0 0.8 0.5 ??????

19.0!

Which is the larger wire?AWG

AmericanWire Gauge

Metric wire size

Page 33: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Not all schematics are the same

Some diagrams will leave out detail

Color Codes change ….

….B could be Blue

….OR….

….B could be Black

The order of wire coding can also change

Page 34: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Circuit Code

Page 35: Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring Diagrams Wiring

Not all schematics are the same

When you see a new symbol look it up!

The better you are at reading diagrams... ...the more mental power you will have… …available to diagnose and fix the problem!!


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Contents - Wiring Diagrams