Pinpoint Test A - Windshield Washer Does Not Work

Inspect fuses, connections, and wiring. If all are okay, go to next step. Repair any obvious defects.
Connect NGS tester, following manufacturer's instructions. Retrieve continuous DTC's. Perform ON-DEMAND SELF-TEST. If DTC B1450 exists, go to next step. If no DTC exists, go to step 4). If DTC B1456 self-test and continuous exists, repair Black/White wire between GEM and washer pump relay. If DTC B1460 self-test and continuous exists, repair Tan/Red wire between GEM and washer pump relay. Clear DTC, then rerun ON-DEMAND SELF-TEST. If DTC still exists, go to step 13). If DTC's B1431, B1434, B1458, B1446, B1476 and B1473 self-test and continuous exist, go to step 7).
Unplug wiper switch. Read PID WASH-LOW. Ground Light Blue/Orange wire at switch harness connector. If NGS tester indicates switch is on, go to next step. If tester does not indicate switch is on, repair Light Blue/Orange wire between switch and GEM. 4)Turn ignition on. Operate wiper switch to exercise each wiper/washer function. If switch operation is okay, go to next step. If switch fails to operate properly, repair Pink/Yellow wire between switch and GEM.
Inspect for short to ground on Pink/Yellow wire between switch and GEM. Repair as necessary. If wire is okay, go to next step.
Test for battery voltage on White/Black wire at washer pump relay, located at right front of engine compartment. If battery voltage exists, go to next step. If battery voltage does not exist, repair White/Black wire to washer pump relay. See WIRING DIAGRAMS .
Unplug washer pump. Run wiper control functional test with NGS tester. Energize washer pump relay. Test for battery voltage on Black/White wire at washer pump connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair Black/White wire between washer pump relay and washer pump.
Energize washer pump relay. Test for battery voltage on Black/White wire between washer pump relay and washer pump. If battery voltage does not exist, temporarily substitute with a known good washer pump relay, then go to next step. If battery voltage exists, temporarily substitute with a known good washer pump, then retest system.
Inspect Black wire for open between washer pump and ground. Repair ground wire as necessary. If wire is okay, go to next step.
Inspect Black/Light Green wire from fuse panel for short to ground. If wire is okay, go to next step. Repair Black/Light Green wire as necessary. See WIRING DIAGRAMS .
Inspect Black/White wire between washer pump relay and washer pump for short to ground. Repair Black/White wire as necessary. If wire is okay, go to next step.
With ignition off, unplug 26-pin GEM connector. Test harness connector pin No. 24 (Tan/Red wire) for battery voltage. If battery voltage exists, repair short to voltage on Tan/Red wire, then go to next step. If battery voltage does not exist, temporarily substitute with a known good washer pump relay, then retest system.
Reconnect negative battery terminal. Connect NGS tester. Run wiper control functional test with NGS tester. Energize washer pump relay. If washer pump works, inspect wiring and connectors for intermittent contact. If washer pump does not work, temporarily substitute with a known good pump, then retest system.