I have a 2007 mustang an the wipers wont turn off I had 2 pull the fuse to turn them off can u help me

Find a good schematic for your car's windshield wiper circuit. It's a simple circuit to follow, but you will probably have to replace a circuit board.
Hope this helps.

The windshield wiper motor is a smart wiper motor with an integrated electronics module. The internal components of the motor are the high/low relay, washer pump relay, and the run/park relay and associated electronics.
The windshield wiper motor receives its inputs from the windshield wiper/washer switch. These signals are ground reference signals. When the switch is placed in different positions, various input signals are selected and sent through circuits to the motor. The windshield wiper motor module identifies these selected input signals and activates the motor to the selected function.!
Your probably going to need a new wiper motor ! ! ! But you should always test before replacing parts !
Visual Inspection Chart Mechanical Electrical

• Windshield washer pump hoses
• Windshield wiper mounting arm and pivot shaft

• Bussed electrical center (BEC) fuse 10 (30A)
• Smart junction box (SJB) fuse 3 (10A)
• Circuitry
• Windshield wiper motor
• Windshield washer pump
• Windshield wiper/washer switch

• The wipers stay on continuously

• Circuitry
• Windshield wiper motor
• Windshield wiper/washer switch

• Go To Pinpoint Test C .

PINPOINT TEST C: THE WIPERS STAY ON CONTINUOUSLY CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
Test Step Result / Action to Take C1 CHECK THE WINDSHIELD WIPER/WASHER SWITCH

• Key in OFF position.
• Disconnect: Windshield Wiper/Washer Switch C2137.
• Carry out the windshield wiper/washer switch component test. Refer to Wiring Diagrams Cell 149 for schematic and connector information.
  
• Does the windshield wiper/washer switch pass the component test?

Yes
GO to C2 .

No
INSTALL a new windshield wiper/washer switch. REFER to Wiper/Washer Switch in this section. C2 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD), AND 63 (RD) FOR A SHORT TO GROUND

• Disconnect: Windshield Wiper Motor C125.
• Measure the resistance between the windshield wiper motor C125, harness side and ground as follows:
  
  Windshield Wiper Motor C125 Pin Circuit C125-10 56 (DB/OG) C125-11 58 (WH) C125-1 63 (RD) C125-9 61 (YE/RD)
  
  
• Are the resistances greater than 10,000 ohms?

Yes
GO to C3 .

No
REPAIR the circuit(s). TEST the system for normal operation. C3 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION

• Disconnect all the windshield wiper motor connectors.
• Check for:
  • corrosion.
  • pushed-out pins.
• Connect all the windshield wiper motor connectors and make sure they seat correctly.
• Operate the system and verify the concern is still present.
• Is the concern still present?

Yes
INSTALL a new windshield wiper motor. REFER to Wiper Motor in this section. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
You