Rear Wiper Control Unit Input Test

1.Remove the right rear side trim panel.

2.Disconnect the 12P connector (A) from the control unit (B).

 

3.Inspect the connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
  • If the terminals look OK, go to 4.

4.Reconnect the connector, and make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, go to 5.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
BLK Under all conditions Check for voltage to ground:
There should be less than 1 V. 
  • Poor ground (G601, G701)
  • An open in the wire
 
WHT/BLU Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 3 (15 A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
12 RED/GRN Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 9 (7.5 A) fuse in the under-dash fuse/relay box
  • An open in the wire
 

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
LT GRN/RED Ignition switch ON (II) and rear wiper switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 9 (7.5 A) fuse in the under-dash fuse/relay box
  • Faulty wiper/washer switch
  • An open in the wire
 
GRY/RED Rear wiper in park position Check for voltage to ground:
There should be less than 1 V. 
  • Poor ground (G601, G701)
  • Faulty rear wiper motor
  • An open in the wire
 
Rear wiper in stand by position 
GRY/BLU Rear wiper in park position Check for voltage to ground:
There should be less than 1 V. 
Rear wiper in stand by position Check for no voltage to ground:
There should be 5 V or more. 
10 GRN/WHT Hatch glass open Check for voltage to ground:
There should be less than 1 V. 
  • Poor ground (G601, G701)
  • Faulty hatch glass latch switch
  • An open in the wire
 
Hatch glass closed Check for voltage to ground:
There should be 5 V or more. 
  • Short to ground
  • Faulty hatch glass latch switch
 
11 BLK/YEL Hatch glass opener switch pushed Check for voltage to ground:
There should be less than 1 V. 
  • Poor ground (G501)
  • Faulty hatch glass opener switch
  • An open in the wire
 
Hatch glass opener switch released Check for voltage to ground:
There should be 5 V or more 
  • Short to ground
  • Faulty hatch glass opener switch
 

5.Disconnect the connector, and make these input tests at the connector.

  • If all the input tests prove OK, the control unit must be faulty; replace the rear wiper control unit.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
WHT/RED Connect the No. 5 terminal to No. 3 terminal Check rear washer motor operation:
The rear washer should come on. 
  • Blown No. 3 (15 A) fuse in the under-dash fuse/relay box
  • Poor ground (G301)
  • Faulty rear washer motor
  • An open in the wire
 
LT GRN/BLK Connect the No. 3 terminal to No. 2 terminal, and No. 1 terminal to No. 6 terminal Check rear wiper motor operation:
The rear wiper should come on. 
  • Blown No. 3 (15 A) fuse in the under-dash fuse/relay box
  • Poor ground (G601, G701)
  • Faulty rear wiper motor
  • An open in the wire
 
GRN/RED 
BLK/YEL Rear wiper park position, connect the No. 5 terminal to No. 7 terminal Check hatch glass opener actuator operation:
The hatch glass should open. 
  • Poor ground (G601, G701)
  • Faulty hatch glass opener actuator
  • An open in the wire