Pinpoint Test A: The Climate Control Illumination Is Inoperative - Front Or Rear (If Equipped)

A1 CHECK THE ILLUMINATION CIRCUIT 1417 (LG/RD) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Inoperative Climate Control Assembly.
- Place the headlamp switch in the ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the front climate control assembly C294a-2, circuit 1417 (LG/RD), harness side; and between the RICP C9025-17, circuit 1417 (LG/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between RICP C9025-17, Circuit 1417 (LG/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to A2 .
- No : REPAIR the circuit. TEST the system for normal operation.
A2 CHECK CIRCUITS 1203 (BK/LB) AND 1205 (BK) FOR GROUND
- Measure the resistance between the front climate control assembly C294a-1, circuit 1203 (BK/LB), harness side; and between the RICP C9025-7, circuit 1205 (BK), harness side and ground.
  
  Fig 2: Measuring Resistance Between RICP C9025-7, Circuit 1205 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new climate control component (front or rear). REFER to CONTROL COMPONENTS . TEST the system for normal operation.
- No : REPAIR the circuit in question. TEST the system for normal operation.