Pinpoint Test 3
PINPOINT TEST 3: THE HIGH/LOW WIPER SPEEDS DO NOT OPERATE CORRECTLYNormal Operation
Under normal operation, when any wiper mode except OFF is selected, the multifunction switch provides a combination of grounds to the smart junction box (SJB) through circuits (Y/R), (R), (DG) and (LB/O). The SJB interprets this ground combination to determine the desired wiper mode.
Voltage is provided to the high/low relay coil through circuit (R). When low speed is commanded, the high/low relay is de-energized and voltage is sent to the wiper motor through circuit (W). When high speed is commanded, the smart junction box (SJB) provides ground to the high/low relay coil through circuit (GY/LB). When the high/low relay is energized, voltage is sent from the high/low relay to the wiper motor through circuit (DU/O).
Possible Causes
- An open in circuit (DUO), (W), (GY/LB), (LB/O) or (R)
- A short to voltage in circuit (GY/LB)
- A short to ground in circuit (GY/LB), (LB/O)
- A short together in circuit (DL/O) and (W) or (R) and (LB/O)
- Wiper high/low relay
- Wiper motor
- Multi-function switch
- Smart junction box (SJB)
Step 1-Step 5:
Step 6-Step 9:
Step 10-Step 12:
