What is a typical GM starting system wiring diagram?
Click on the image here to pull up a PDF of a typical GM starting system wiring diagram. Depending on the year, model and engine of your GM vehicle, your starting system may be less complicated or use only some of the components shown here. For example, earlier anti-theft systems didn’t communicate the same way with the PCM.
What are the symbols on a car wiring schematic?
There are electrical symbols posted on the schematic that will indicate the color of the wire, its thickness or size and other important details about that particular circuit such as connector locations. Identifying the color of the wire is important for accurate diagnosis.
Do you need a wiring diagram for a car?
Before we begin please let me tell you what a wiring diagram won’t do. Automotive wire diagrams don’t show the actual position of parts or the physical appearance of the components. Standard wire schematics don’t reveal the length of conductor wire that runs between the particular components shown.
What does a reference number on a wiring diagram mean?
Incomplete components have a reference number to indicate the page where the component is shown complete. It is important to realize that no attempt is made on the diagrams to represent components and wiring as they appear on the vehicle. For example, a short piece of wire is treated the same as a long one.
Click on the image here to pull up a PDF of a typical GM starting system wiring diagram. Depending on the year, model and engine of your GM vehicle, your starting system may be less complicated or use only some of the components shown here. For example, earlier anti-theft systems didn’t communicate the same way with the PCM.
Which is the best site for factory wiring diagrams?
Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. Alldatadiy.com, on the other hand, uses the factory diagrams.
Is the ignition switch part of the PCM?
The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM).