When I switch on the wiper blades they only travel halfway up the windscreen, with difficulty. I have checked the fuse it's fine, ive looked for obstruction non, the motor is obviously working to a degree and getting hot probably because its trying to work, the widscreen is clean? can you help? I have a 2004 Audi A4? Help. Your assistance is appreciated.
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Re: Wiper Blades not working properly
First you must diagnose why windscreen wipers going slow and/or stopping. In order to find out the cause of wipers stopping you can try follows: 1. Carefully extract the wiper arms from their axles (two pieces). In some cases you need to use an extracting tool. Heed of the windscreen !!! 2. Disassemble the plastic covers from the bottom of the windscreen. 3. With the bonnet up you can start the engine, (transmission in "N" or "P" position and parking brake on). Now you must switch on the control lever of the wipers, and go to the engine compartment. If the wiper motor runs let the wiper motor running for a few minutes and switch off. Go to the step 4. If the wiper motor do not runs you must check first the electrical feeding of the motor. It is necessary to unscrew three bolts of the mechanism and disconnect the electrical coupling (difficult assurance). If the electrical feeding is OK you must replace the motor - steps 5, 6, 7. If not you must check electrical connections, the control switch of wipers and electric cables. 4. Now you must check the two bearings of wiper mechanism with your hand. In the most cases the left bearing is out of order (is very hot). This is the most encounter fault of the wipers running at Audi. 5. For have enough space to manipulation the wiper motor together with their mechanism you must extract the plastic cover of the engine computer box, and extract also the box screws. Then you can move slowly the engine computer box, just for a few milimeters. 6. You must disconnect the electrical coupling of the motor (difficult assurance), unscrew three bolts of the mechanism and extract together with the motor. You must move them slowly between windscreen and engine computer box until the wiper motor go out together with the mechanism. This is the most difficult operation! 7. Now you can repair the bearings, replace entire wiper mechanism or replace the wiper motor. It is not very simply, but it works. Heed of the windscreen !!! Refit all in reverse order.
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normally if the wiper arms park in the wrong place , it is the fitting of the wiper arms on the pivot that is wrong
try pulling the wipers back off the windscreen , run them through a cycle and then switch off normally
that will be the park position in the motor gear box
then remove each arm from the pivot and re- position it about 1" from the bottom of the screen
that will be the parked position for the wiper blades
having done that then again pull the arms back of the screen and cycle as if wiping the screen
switch of and see where the arms now park on the screen
if it is close to where you set them then that is the park position
next run the wipers a cycle and see if at full movement one arm puts the blade over the edge of the screen or hits the edge
switch off and re-position that arm closer to the bottom of the windscreen
it is time consuming but the only way to park wipers properly as there is no master spline to set in the correct position
If they park any where after this exercise ,replace the wiper unit as there is a problem in the contacts in the motor box.
Do not replace your wiper blades until you have tried this, get some warm soapy water, soft all purpose cloth. Hose down your front and rear windscreen (if fitted with wiper blades) with normal water, clean the windscreen as you would when washing the vehicle. Get your cloth and dip it into warm soapy water, if your wiper arm stays upright put it in that position other wise lift it up and put a piece of towel or similar under it. Now with the soapy cloth give the wiper blade edge a good scrub, up and down, hold the blade itself with one hand on one end, it may slide out, you will notice the cloth getting black, you are cleaning off all the dirt that is stuck on the wiper blade, simple as that. It is usually that dirt which causes your wiper blades not to clean properly, you will eventually need to replace it but give it a go, you will be surprised.
loosen the nut at the bottom of the blades so that the wiper motor will work without moving the blades. cycle the wipers and allow the motor to come to the rest position. Fit the blades and tension the nut. Pull the arms off the windscreen and cycle the wiper motor to run until it stops put the wipers back on the screen and see where they are. IF parked properly then OK but if any where then replace the wiper motor as the sequencing gear inside is out of sync with the wiper action.
The problem you have comes from wiper blades causing friction in light rain conditions and can be cured by cleaning the rubber that contacts your windscreen with a rubber cleaner/conditioner or you can use spray silicone on the blades.
How to Replace Wiper Blades Guide: Potential tools needed to replace wiper blades:
Flat blade screwdriver (small)
Small nosed pliers
Latex or vinyl gloves
To replace wiper blades the actual action of replacing the blade is no big deal, it's the location of the blade down below the hood that can make it difficult though. Sometimes it helps to open the hood to gain access to the wiper blades. Other times it is helpful if the wiper blade is somewhere in the motion line of wiper action. The trick is to get the wiper to stop somewhere in the wiper arc. Turn the wipers to the on position and allow the wipers to start, and then shut the key off when the wiper has arrived in a desirable position on the windshield. To replace your wiper blades please follow the step by step instruction below. Also, watch the How to replace wiper blades video below to gain additional information. The method in which the wiper blades are attached will vary slightly.
Step 1: With the hood closed, turn the wipers on, when the wipers are in the middle of their arc turn the key to the off position. (Note: if this can't be done because of wiper condition and you want to avoid scratching the windshield please open your hood to gain access)
Step 2: Locate the mounting clips at the top pivot on the wiper blade
Step 3: Release the clip and remove the wiper arm
Step 4: Match the size of the old blade against the new blade to ensure proper fit and operation
Step 5: Reinstall the new wiper blade and recheck wiper operation
Make sure the wiper blades are the same size as the original blades.
When replacing wiper blades not getting the blade on the mounting pin completely allowing the wiper arm to become dislodged and possibly causing damage to the windshield.
Using wiper blades after the blade has failed permanently damaging the windshield by craving scratches in the wiper arc.
Wiper blade can create a chattering noise when the blade is not properly balanced allowing the blade to "flop" back and forth as the wiper direction changes.
I hope help you with this (remember rated this help) Good luck.
The motor is usualy central to the wiper arms and either bolted to the firewall or inside the plenum chamber at the bottom of the windscreen.If you can hear the motor you can find it, track it down by listening.Your probly right about linkage however if that is the case you should be able to move the wipers with your hand and they should move freely if they dont you may have other problems.
My 1998 megane developed same prob dont worry its easy to solve! Open bonnet locate w/screen wiper motor lift up the black plastic moulding around windscreen wiper undo 10 ml bolt holding motor in place get a length of wire about 16ins pare off the end of wire wrap around the head of now loosened bolt tighten bolt replace cover then attach other end of wire to chassis or earth wire on battery hey presto everything functions again took me 10 mins and im a chef lol