Fuse 18 Blowing - Short -

Have you disconnected everything you can on the circuit and then reconnected them one at a time (with the key on) till the fuse blows?

http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

There's a lot on fuse 18 (that link was not meant to list it all - an EVTM page is needed for that, and I don't know of one online).

If not disconnecting everything, I would really look at the wiring under the column and the engine bay sensors (the low oil level and coolant sensors are on that circuit and exposed, for example).

You might wanna rig up some jumper wires and a circuit breaker - it saves the expense of fuses while doing diagnostics. Note that any short is capable of starting a fire so use caution and proper safety.


Anyhoo, maybe someone can put up an EVTM page for ya. I'll send you a PM about something too.

89 Mustang wiring diagrams zip package– the 88 Mustang should be the same except for the computer & MAF wiring. None of that runs off fuse 18, so you should be OK. Catch me before Wednesday because after that I won't have access to the diagram set for some time.

PM me your email address and I will send you a complete Ford Factory 89 Mustang electrical diagram set. The zip file is 2.5 MB and is too big to fit through Stangnet's email gateway.


They are in a zip file format to reduce the size of the package. You’ll need WinZip or other Windows archive tool to extract them from the zip file. See www.majorgeeks.com - Download Freeware and Shareware Computer Utilities for a free download.

You will need the Adobe Acrobat viewer which is also a free download – www.adobe.com/products/acrobat/readstep2.html - Adobe Reader download - All versions