Top 10 2003 Ford Mustang Questions & Answers

here you go
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

Fuse Box Diagram

Circuit Schematic

I trust that these are what you are looking for, they are screen captures of the requested information right from Ford.

I would check the neutral safety switch. It's located on the shift shaft of the transmission and is known to go bad

Convertible Top Motor, Power Convertible Top. ...

Hi,this is the central fuse box diagram for your 20003 ford mustang.

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3.8L and 4.0L Engines Firing order: 1–4–2–5–3–6 Distributorless ignition system

There is a switch under the dash for the Brakes. If this is the part they are replacing it can be due to physical damage caused by shoes hitting it. If you can check the repair bill find out if the switch is broken or burned out each time it was replaced.

If the switch is burning up, you need to trace the Brake wiring to the 3 fixtures. The high fixture and both taillights. Your problem would be bad light sockets or a bad wire to the brake. You are just operating about 3 lightbulbs, which at best is maybe 3 Amps. But if the power is grounding through a bad wire or bad socket, it will draw as much as it takes to melt the connection.

Don't know how important it is to you to know if your feet or someone else's feet are hitting the underdash switches. You could put ATV blue on the switch and it would rub off on the shoes hitting the switch. But it could make a mess on a carpet or start a War.

I hope you find my solution very helpful.

1-4-2-5-3-6

There are two possibilities...

1. The crankshaft and camshaft sensors are not properly synchronized to each other. This is a procedure that must be performed with special tools.
2. A bad alternator diode can cause this code to set due to voltage ripple. Have the alternator/charging system tested.

The fuel pump shut-off

switch is located on the

left side of the trunk

between the left rear tail

light and the trunk liner,

and to the left of the

hole in the trunk liner

To reset the switch:

1. Turn the ignition OFF.

2. Check the fuel system for leaks.

3. If no leaks are apparent, reset the switch by

pushing in on the reset button.

4. Turn the ignition ON.

5. Wait a few seconds and return the key to OFF.
6. Make another check of leaks