1. Hello there guest and Welcome to The #1 Classic Mustang forum!
    To gain full access you must Register. Registration is free and it takes only a few moments to complete.
    Already a member? Login here then!

A REAL Schematic

Discussion in 'Electrical Board' started by Mach1 Driver, Jul 11, 2017.

  1. Mach1 Driver

    Mach1 Driver Active Member

    A REAL Schematic

    Until now there were no entire car schematics for our cars, only wire diagrams. This schematic is 4 pages in four separate pdf files (a quirk of my CAD software).

    A real schematic rarely makes any attempt to identify wires or plugs or connectors. A real schematic tries to show the internal workings of a component when it helps to explain a circuit. A real schematic simplifies. A real schematic is used when you want to understand how a circuit works.

    A real schematic is what the designer makes first, then he converts it to a wire diagram. A wire diagram shows where wires go and how to connect them. You need BOTH to work on a car, unless the wire diagram is just so darn simple you don’t need the schematic.

    Our electrical systems consist mostly of switches and lights; around 44 and 41 respectively. Switches are either open or closed. This schematic only shows when a switch is closed. Usually that is indicated by a few simple words below the switch like on, off, run, start, etc. Pay attention to the top section of page one. It shows the most often used symbols on the schematic.

    I started this project so I could calculate the electrical loads and know what size alternator to get for my future needs (EFI, fuel pump, halogen lights, power windows, etc.) Amperage information for a stock 1969 Mach1 is in an accompanying spreadsheet (Mustang amps.xls) along with a chart of our most common electrical load: light bulbs. If you don’t like the loads I used to calculate “Likely constant amp draw”, by all means alter the spreadsheet to suit your needs, or use simple math- just don’t complain to me.

    My hope is that this schematic and spreadsheet become valuable reference tools for other hobbyists. Thanks Emilio, the spreadsheet is uploaded and working now.

    Attached Files:

    Last edited: Jul 14, 2017
    tarafied1, Fst Blk and Grabber70Mach like this.
  2. Fst Blk

    Fst Blk Well-Known Member

    Thanks for all the hard work on this.

    Sent from my iPhone using Tapatalk
  3. Midlife

    Midlife Well-Known Member Staff Member Moderator

    As I stated on the 69/70 forum, great work! I like it!
  4. Mach1 Driver

    Mach1 Driver Active Member

    Thanks, I'm still waiting for Emilio to upload the real spreadsheet (Mustang amps.xls). This site doesn't show any Excel files in my directory, so I can't upload it!
    Edit: Emilio fixed it and real spreadsheet is working
    Last edited: Jul 14, 2017
  5. StangFix

    StangFix Member Staff Member Administrator

    Sorry so late it should work now

    Attached Files:

Share This Page