Test E: Front Wiper Wash & Wipe Function Inoperative Or Does Not Operate Correctly
- Turn ignition switch to RUN position. Operate multifunction switch to wash and wipe function and check for proper operation. If wipers work properly, go to next step. If wipers do not work properly, go to step 5.
- Turn ignition switch to LOCK position. Disconnect washer pump harness connector C828. Turn ignition switch to RUN position. Turn multifunction switch to wash and wipe function and measure voltage between washer pump harness connector C828 terminals No. 1 (White/Black wire) and No. 2 (Yellow/Black wire). See Figure. If battery voltage does not exist, go to next step. If battery voltage exists, replace washer pump and retest. See WINDSHIELD WASHER PUMP & RESERVOIR under REMOVAL & INSTALLATION.
- Turn ignition switch to LOCK position. Disconnect multifunction switch 10-pin harness connector C441. Measure resistance of White/Black wire between washer pump harness connector C828 terminal No. 1 and multifunction switch harness connector C441 terminal No. 2. See Figure and Fig 1
. If resistance is 2 ohms or less, go to next step. If resistance is greater than 2 ohms, repair open or short to ground in White/Black wire between multifunction switch and washer pump. See WIRING DIAGRAMS .
- Measure resistance of Yellow/Black wire between washer pump harness connector C828 terminal No. 2 and multifunction switch harness connector C441 terminal No. 4. See Figure and Fig 1
. If resistance is 2 ohms or less, replace multifunction switch. If resistance is more than 2 ohms, repair open in Yellow/Black wire between washer pump, in-line connector C70, central junction box and multifunction switch.
- Operate multifunction switch to intermittent wipe function and check for proper operation. If wipers work properly, go to next step. If wipers do not work properly, run Generic Electronic Module self test. See appropriate MODULE COMMUNICATIONS NETWORK
article.
- Turn ignition switch to LOCK position. Disconnect GEM connectors C104 and C105. GEM is located in CJB. Turn ignition switch to RUN position. Operate multifunction switch to wash and wipe function. Measure voltage between C104 terminal No. 5 and battery voltage. See Figure. Measure voltage between C105 terminal No. 2 and ground. See Figure. If battery voltage does not exist, go to next step. If battery voltage exists, replace GEM and retest.
- Disconnect multifunction switch connector C441 and GEM connectors C104 and C105. Measure resistance between C441 terminal No. 2 and C104 terminal 5 (White/Black wire). See Figure and Figure
. Measure resistance between C441 terminal No. 4 and C105 terminal No. 2 (Yellow/Black wire). See Figure and Figure
. If resistance is 2 ohms or less, replace multifunction switch. If resistance is greater than 2 ohms, repair open circuit(s).
Courtesy of FORD MOTOR CO.