Pinpoint Test P: The Defrost System Will Not Shut Off Automatically - Heated Wiper Park

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

P1 CHECK FOR A SHORTED CONTROL CIRCUIT
- Key in OFF position.
- Disconnect: Heated Wiper Park Relay C1014.
- Measure the resistance between the heated wiper park relay C1014-85, circuit 91S-HB7 (BN/RD), harness side and ground.
  
  Fig 1: Measuring Resistance Between Heated Wiper Park Relay C1014-85, Circuit 91S-HB7 (BN/RD)
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
1. Yes : GO to P3.
2. No : GO to P2.
P2 CHECK CIRCUIT 91S-HB7 (BN/RD) FOR A SHORT TO GROUND
- Disconnect: DATC Module C228b.
- Measure the resistance between the heated wiper park relay C1014-85, circuit 91S-HB7 (BN/RD), harness side and ground.
  
  Fig 2: Measuring Resistance Between Heated Wiper Park Relay C1014-85, Circuit 91S-HB7 (BN/RD)
  Courtesy of FORD MOTOR CO.
- Is the resistance greater 10,000 ohms?
1. Yes : INSTALL a new DATC module. REFER to MODULE COMMUNICATIONS NETWORK - LS for the removal and installation procedure. TEST the system for normal operation.
2. No : REPAIR the circuit. TEST the system for normal operation.
P3 CHECK CIRCUIT 30S-HB42 (RD/YE) FOR A SHORT TO BATTERY
- Key in ON position.
- Measure the voltage between the heated wiper park relay C1014-87, circuit 30S-HB42 (RD/YE), harness side and ground.
  
  Fig 3: Measuring Voltage Between Heated Wiper Park Relay C1014-87, Circuit 30S-HB42 (RD/YE)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes : REPAIR the circuit. TEST the system for normal operation.
2. No : INSTALL a new heated wiper park relay. TEST the system for normal operation.