Ford I presume. Here's the quote from the ebay auctio I got it from:
"This auction item is a USED 2004 Lincoln LS Ford Motor Company Wiring Diagram Manual. This Ford Motor Company Publication contains 160 sections of information on electrical troubleshooting with complete wiring diagram layouts. Book is in excellent condition. This is the same manual used at Ford and Lincoln Mercury Dealerships. This is a must have item for wire tracing and electrical diagnostics. Publication number is FCS-12885-04."
Marc