RE: Wipers wont park Gen 2
The manual has literally pages of diagnostic tests. Here is a pertinent section...
Parking Test
Tool Required:
> Rotunda Digital Volt-Ohmmeter 014-00407
The ignition switch must be in RUN position for all tests. Verify proper operation of wiper system in low speed. With system operating in LO, turn wiper system switch to OFF when wiper blades are in vertical (straight-up) position. Wipers should complete cycle and depress park (below windshield). If wiper blades do not park, locate the system's condition on the list below and test and service as indicated.
> Motor stops when wiper switch is turned to OFF. (Does not complete cycle).
1. Remove motor park switch connector and check for battery voltage, using Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent, on Circuit 65 (dark green). If battery voltage is not present, service circuit as required. If voltage is present, go to Step 2.
2. Check motor ground wiring at switch connector.
3. With both wiper motor connectors disconnected, use an ohmmeter, such as Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent, to verify continuity (less than one ohm) between circuits 28 and 56 in wiring harness. If continuity is not present, trace and service as required. If continuity is OK, leave connectors disconnected and go to Step 4.
4. Check for continuity to ground terminal on gear cover at circuit terminal 28 on wiper motor. If open, replace wiper motor. If ground is present, leave connectors disconnected and go the Step 5.
5. Verify continuity (less than one ohm resistance) between Circuits 61 and 63 in wiring harness. If continuity is not present, trace and service as required. If lack of continuity is traced to interval governor, check wiper switch for continuity. Refer to «Section 11-05». Replace switch if continuity is not present. If continuity is present in switch, and lack of continuity has been traced to control module, replace module. If continuity between Circuits 61 and 63 is OK, leave connectors disconnected and go to Step 6.
6. Check for continuity between circuit terminals 63 and 65 on wiper motor. If open, replace motor.
> Wiper blades go into depressed park (below windshield), but wiper motor keeps running. Replace motor.
> Wiper blades stall or jam (motor starts running in reverse direction) while going from park to depressed park (below windshield).
1. Check linkage and service as required. If OK, go to Step 2.
2. Check wiper motor arms and windlatch assembly. If bent or cracked, replace wiper motor.
> Wiper blades complete cycle, but continue to wipe for part of another cycle and park on windshield, or
> Wiper blades run continuously when switch is in OFF or INT position, or
> Wiper blades run to bottom of windshield and stop, but will not depress park below windshield.
1. «Perform Wiper Switch Continuity Test» 'Refer to «Section 11-05». If continuity test fails, replace switch. If continuity test is OK on interval wiper system go to Step 2.
2. Check wash circuit 941 for no voltage. If any voltage is present, service as required. If no voltage is present, go to Step 3.
3. Disconnect connectors at wiper motor and check for continuity between Circuits 61 and 63 going to control module. If open, replace control module. If continuity is present, replace motor.