Headlight Washer Control Unit Input Test

1.Remove the driver's dashboard lower cover.

2.Disconnect the 6P connector (A) from the headlight washer 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.With the connector still disconnected, 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, replace the headlight washer control unit.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
1 WHT/RED Under all conditions Connect the No. 2 terminal to the No. 1 terminal with a jumper wire.
The headlight washer should operate. 
  • Blown No. 12 (30A) fuse in the under-hood fuse/relay box
  • Faulty headlight washer motor
  • Poor ground (G202)
  • An open in the wire
 
2 RED/BLU Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 12 (30A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
4 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G503 [G506])
  • An open in the wire
 
5 PUR Under all conditions Check for continuity between the combination switch 6P connector No. 6 terminal and headlight washer control unit 6P connector No. 5 terminal.
There should be continuity. 
  • An open in the wire
 
6 RED Headlight switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 6 (10A) fuse in the under-hood fuse/relay box
  • An short in the wire
  • An open in the wire
 

[ ]: RHD type