What year? Mist of the FSM/DSM can be bought on ebay in cd/DVD form for a reasonable price. Just make sure they have all the electrical diagrams. I have one I bought for the 08 and it is the DSM, but lacking the electrical diagrams. They should be on it, but do not come up when selected.
FSM is Factory Service Mamual.
Looking at Ebay, you can get the full set in paper form or USB thumbdrive.
If going the USB/DVD/download, make sure to check the seller reviews.
If you can get a complete set of Workshop Manuals to include Wiring and Powertrain Control/Emissions for your year that's the ticket. In my experience most of the online manuals don't include everything in the paper manuals. At least the free ones.
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<br> <br> You are bidding on a genuine 2012 Ford Mustang Electrical Wiring Diagrams Service Manual. Cover shows normal wear ; insides are in overall very good condition.
The DVD contains hundreds of images and diagrams, plus step-by-step instructions to help you diagnose, repair, and assemble/disassemble your vehicle. The content can be printed for portability or viewed on a laptop for convenience.