Wipers would not park, customer forced down wiper arm and broke off arm. Now no electric to wipers.

You put the arm on the motor 180 degress out

Hi Orangie, It sounds to me as if there is a problem with the threads on the shaft or the nut holding the arm! Try to replace the nut with a self locking type. (Those are the type which have a plastic insert at the bottom or the top) It sounds as if the arm has been placed in the wrong position when you have reattached it on previous occasions. The wiper motor shaft has splines so when attaching the arm set it so that the self park mechanism is synced for the off to have the wiper blades down. If the shaft of the motor has been damaged you may need to replace the wiper motor. If you do, take a walk around some braekers yards and have a look for a good second hand unit. that may save you a lot of cash! Regards John

Please check the power cable for loose and fuse for blower. Please get them fixed together with your wiper arm.
Regards

try revoving the caps at the bottom of the wiper arms, and see if the fasteners have come loose. very common problem when they're turned on while frozen to windshield. if so, turn wiper motor off and let it come to "park" position. then tighten fasteners with blades in the down, or "park" position. If the arms are not simply loose on the stems, the you have a wiper transmission problem. either broke or has come off at one of the pivots. this is a little more serious and you may want to have that handled by a pro.

Using a small flat blade screwdriver and prying up.Then remove the 13mm headed nut.remove the stripped arm and clean the splines on the stem where you removed the arm.Turn your key on and turn your wipers off.After you see the stems stop moving then reinstall the arm on the bottom of the windshield like they be when not being used.If the vehicle has factory windshield in the windshield may have dots or lines where the wipers should sit on the windshield when parked.next tighten the nut and try out the wipers to make sure they move correctly.

The motor could be bad, but it's likely that the ball joint connections under the hood area under the cowl have become disconnected for the one windshield wiper arm.

The connection of the arm that moves should be checked for being at the correct angle for parking.
Removal & Installation 2000-03 Wiper Motor and Bushing Replacement L4-2.2L (Vin F) & V6-3.0L (Vin R) To Remove:

1. Before servicing the vehicle refer to the precautions at the beginning of this section
2. Remove the wiper arm finish caps
3. Mark both wiper arm positions on the windshield by using a wax pencil or tape
4. Remove or disconnect the following:
   • Wiper arm retaining nuts and washers
   • Wiper arms
   • Weather-strip at rear of hood
     
     
     
     
   • Grill nuts from base of wiper arm shaft
   • Grill
   • Electrical harness connector from the wiper motor
   • Wiper motor retaining bolts
   • Wiper motor assembly from plenum area
   
   
   
   
   
5. If replacing wiper module bushings remove the steel bushing first then the rubber grommet
6. Remove the wiper motor from the transmission assembly

To Install:

1. Install or connect the following:
   • Wiper motor to transmission assembly NOTE: If the wiper module bushings were replaced install the rubber grommet first then the steel bushing.
     
   • Wiper motor to plenum area
   • Wiper motor retaining bolts; torque to 44 lb-in. (5 Nm)
   • Electrical harness connector to the wiper motor
   • Weather-strip at the rear of hood
   • Grill
   • Grill nuts to the base of the wiper arm shaft
2. Install the wiper arm assemblies at the marks made during removal or at the PARK position if a new wiper motor is installed
3. Install the wiper arm retaining washers and nuts; torque to 9 lb-ft. (12 Nm)
4. Install the wiper arm finish caps
5. Verify correct wiper system operation

Try to run the motor without the wiper arms tightened down and turn it off so it can cycle down to its rest state. Then install the wiper arms.

Make sure, that the car's windshield wiper wiring is correct for this motor.
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Wiper Arm & Blade Removal & Installation Front To Remove:
CAUTION
When the wipers are parked (off), the driver’s wiper arm must be above the passenger’s wiper arm.

1. Remove the clip holding the outside end of the wiper arm cover to the arm.
2. Lift the arm cap up to expose the nut.
3. Remove the wiper arm mounting nut.
4. Using a suitable two jaw puller, remove the wiper arm from the wiper pivot.

To Install:

1. Verify that the wiper motor and linkage are in the parked position.
2. Place the wiper arm in position over the wiper pivot.
3. Install the nut to hold the wiper arm to the wiper pivot. Torque nut to 26 ft. lbs. (35 Nm). CAUTION
   Make sure to tighten the wiper arm nut properly.
   
4. Push the arm cap cover down.
5. Secure the clip holding the cover to the wiper arm.

Rear To Remove:

1. Lift and hold the wiper arm away from the rear window.
2. Lift the lock securing the wiper arm to the pivot.
3. Slowly release the wiper arm so it rests against the lock.
4. Remove the wiper arm from the pivot.

To Install:

1. Install the wiper arm on the pivot.
2. Pull the arm outward and release the lock.
3. Gently release the wiper arm until it rests on the rear window.

The self parking mechanism in the wiper motor assembly has failed, most likely the "emf brake" built into the motor itself. If the self parking microswitch was broken (another common fault) then the wipers would simply keep running until the ignition was turned off.

The only solution is to either get an auto electrician to see if the motor assembly can be repaired or to replace the entire wiper motor. Repair is probably the better option as it's an expensive part.

the wiper arm could need to be replaced
being loose could have have worn the hole in the wiper arm
or the splines on the wiper transmission maybe damaged
i would try a new wiper arm first
use BLUE LOCTITE on the threads and TORQUE the nut to (22 lb ft)
hope this helps

I just solved this problem last night with my '05 Impala, and ultimately the solution was what newton5083 stated above.  Yet, it may also be this (I found it online somewhere):
You have bent or broken the "park tab" on the windshield wiper motor bracket. The correct way to fix this is to remove the wiper arms, wiper linkage and wiper motor from the wiper motor bracket, and install a new bracket.
I just bent the tab back into place a couple times for our daughters 2005 Impala but it kept getting bent down again when they didn't take the time to make sure the wipers were not frozen to the windshield, or tried running the wipers to remove heavy snow on the windshield. So yesterday I fabricated a small piece of metal and bolted that to the bracket in the same place the tab stop was.
If someone wants to access this bracket and tab-
1. Use a ½ inch or 13mm socket & ratchet or wrench to remove nuts on wiper arms.
2. They may make a special tool to remove the arms, I used a screwdriver and hammer to tap bottom of the arm to wedge them apart from the spindle.
3. Two small button-looking clips hold the drivers side cowl cover in place under the windshield. These are two-piece clips, pry up the center, than the outer piece.
4. Unclip the washer hose from cowl cover, than pull out plastic cover.
5. There is a smaller plastic cover with on plastic button head holding that cover in place. Gently pry under that clip to remove that cover.
6. Now you can see the wiper trans and bracket. You should see a small tab on that bracket that looks pushed down and bent or possible a square small hole with some torn off metal where the tab broke off.
7. Remove small plastic cover over the wiper transmission and you can see a small spring-loaded arm underneath the wiper transmission assembly.
8. You need to find something to pry that tab back up so when the wipers are running that spring loaded little arm just snaps past the tab running clockwise. It's when you shut off the wipers that the wiper transmission assembly reverses rotation counter clockwise and the small spring loaded arm underneath hits that tab stop, than the wipers will go all the way down and shut off as they should.
Once that tab stop gets bent out of the way the little spring loaded arm has nothing to stop the wiper transmission assembly so it keeps traveling counter clockwise until some other stop shuts the wipers off straight up on the windshield.

There is a revised bracket part # which is supposed to be more durable, GM part #12368639. Here is a copy of the TSB which points out this problem:
Bulletin No.: 05-08-43-003A
Date: March 10, 2005
TECHNICAL
Subject:
Windshield Wipers Park in Up Position (Replace Windshield Wiper Motor Bracket)
Models:
2005 Chevrolet Impala, Monte Carlo
Supercede:
This bulletin is being revised to make a correction to the Parts Information. Please discard Corporate Bulletin Number 05-08-43-003 (Section 08-Body and Accessories).

Condition
Some customers may comment that the windshield wipers park in the out wipe (vertical) position.
Cause
This condition may be caused by a bent park tab on the windshield wiper motor bracket.

Correction
To correct this condition, replace the wiper motor bracket. It will be necessary to transfer the following parts listed below to the new bracket.
^ Wiper transmission
^ Wiper motor crank arm
^ Wiper motor
1. Remove the windshield wiper motor drive system module.
2. Remove the windshield wiper transmission from the windshield wiper motor bracket.
3. Remove the wiper motor crank arm from the windshield wiper motor.
4. Remove the windshield wiper motor from the bracket.
5. Install the windshield wiper motor to the new bracket.
6. Install the wiper motor crank arm to the windshield wiper motor.
7. Install the windshield wiper transmission to the windshield wiper motor bracket.
8. Install the windshield wiper motor drive system module.

A TSB is not a recall, if vehicle is still under warranty the dealer should be repaired for free. If not, you'll have to pay for the repairs.