Jump to content

How to Read Wiring Diagrams


Recommended Posts

Attached is a technical training manual from Ford, dated 1968, on how to read wiring diagrams. I got this from the MustangTek website. It's the same one that I got with my Ford manuals, on a CD, but mine is DRM protected.

 

How to read Wiring Diagrams-Vol-68-S7-L2A_Book-13001.pdf

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

Link to post
Share on other sites

Don,

 

that's great , very helpful and a nice write up in that language speaking of the past ::thumb::

Tim

 

Never drive faster than your guardian angel can fly :angel:

Link to post
Share on other sites

As a kid, I learned everything I needed to know about electrical by fixing the xmas lights before putting them on the tree.

 

Just kidding, but I'm sure there are many here that know what I'm talking about....

 

 

Link to post
Share on other sites
  • 1 year later...

Gents, I need to locate and check if is or is not working, the circuit braker in between lines 37Y and 10, lines feeding emergency flasher and also stop lamp switch, that can be seen at wiring diagram coordinate C-35. How it looks like? I know glass fuses but no these. I can see both cables LG-R H are entering a bound of wires but cannot see where they are coming from. Thanks in advance.

Link to post
Share on other sites

The green-red wire runs from the circuit breaker to the 4 way flasher connector and then on to the brakes.  The line 37 is part of an OEM splice deeply buried in the harness: battery power.

If you have brake lights, then the circuit breaker is working.  To test the circuit, simply bypass the circuit breaker, use a jumper cable between the two wires and test for brakes.  Don't do this for long, in case there is a short somewhere. 

Let me check your shorts!

http://midlifeharness.com

Flamicon2.jpg

oldfart.png

Link to post
Share on other sites
5 hours ago, midlife said:

The green-red wire runs from the circuit breaker to the 4 way flasher connector and then on to the brakes.  The line 37 is part of an OEM splice deeply buried in the harness: battery power.

If you have brake lights, then the circuit breaker is working.  To test the circuit, simply bypass the circuit breaker, use a jumper cable between the two wires and test for brakes.  Don't do this for long, in case there is a short somewhere. 

 

5 hours ago, midlife said:

The green-red wire runs from the circuit breaker to the 4 way flasher connector and then on to the brakes.  The line 37 is part of an OEM splice deeply buried in the harness: battery power.

If you have brake lights, then the circuit breaker is working.  To test the circuit, simply bypass the circuit breaker, use a jumper cable between the two wires and test for brakes.  Don't do this for long, in case there is a short somewhere. 

Thanks Midlife, my problem is that I have no power in the stop switch or the hazard flasher, so need to check the circuit breaker but do not know where is it and how it looks like. Appreciate any other help.

Link to post
Share on other sites

Power at the top switch is provided by the auxiliary power harness (black w/yellow dots) running from the by the starter solenoid, across the rear of the engine compartment and through the firewall below the brake booster, terminating in a yellow, three prong female plug housing above and behind where your top switch is. The circuit breaker for this is either on your starter solenoid, or on the terminal block on the fender apron (gauge package cars)

Circuit breaker for the brake lights is above the glove box. 

 

 

7172relayplate.jpg

 

 

Link to post
Share on other sites
9 hours ago, Jarturin said:

 

Thanks Midlife, my problem is that I have no power in the stop switch or the hazard flasher, so need to check the circuit breaker but do not know where is it and how it looks like. Appreciate any other help.

It is located behind the glove box area and is an approximately rectangular box, about 3/4 x 3/4 x 2.  You'll see two 90* slip-on connectors with the appropriate colored wires on them.

Let me check your shorts!

http://midlifeharness.com

Flamicon2.jpg

oldfart.png

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.

About Us

7173Mustangs.com is a community forum designed especially for fans and owners of the 1971, 1972 and 1973 Ford Mustang! We are not affiliated with Ford Motor Company in any way.

Site Navigation

Forums
Gallery
7173 Wiki
Blogs
Clubs

7173logo_small.png

Site Info

Founded:
July 2010

By:
Webfinity Design

From:
Latrobe, PA

×
×
  • Create New...