Operation CHARM: Car repair manuals for everyone.
Home >> Lincoln >> 2003 >> LS V8-3.9L VIN A >> Repair and Diagnosis >> Wiper and Washer Systems >> Testing and Inspection >> Pinpoint Tests >> Test S
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test S

PINPOINT TEST S: THE HIGH/LOW WIPER SPEEDS DO NOT OPERATE CORRECTLY (INTERMITTENT WIPER MODE OK)


Test S1-S2:






Test S3-S5:






Normal Operation
The wiper motor receives inputs from the multifunction switch circuits 8-KA8 (WH/RD), 10-KA8 (GY/RD), 8-KA11 (WH/BK) and 8-KA10 (WH/GN). The wiper motor module (internal) will then control the wiper run/park relay (internal) using internal circuitry to control the wiper motor in conjunction with the wiper HI/LO relay (internal).

Possible Causes
- circuit 31-KA19 (BK/RD) open
- circuit 8-KA8 (WH/RD) open
- circuit 10-KA8 (GY/RD) open
- circuit 8-KA11 (WH/BK) open
- circuit 8-KA10 (WH/GN) open
- multifunction switch
- windshield wiper motor
pro multis · About Operation CHARM