RepairPal Certified shops can diagnose and repair your 1999 Ford Explorer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Here are two sources for you:
For AllData:
http://bit.ly/AllData_Repair_Manuals_Online
Here's the one for Mitchell as well:
http://bit.ly/mitchell_repair_manuals_online