[texas993]

Just one for future searches.

When I used the wipers on my G500 2005, it would make a lot of banging noise, as well as not returning to it's proper horizontal position when off.

(This truck is relatively new to me)

I have repaired it. Strangely, the 3 bolts holding a plate to the motor had completely come loose and fallen out. Strangest part of this is that the truck was purchased from West TX, where it rarely rains. Clearly these bolts worked their way loose over a long period of time. I realized that the motor was simply not attached to the vehicle and had tons of free play.

DIY tips.

First, the WIS procedure is somewhat helpful. All of the work can be done from the engine side of the firewall. There is very little room to work from the driver's footwell - and it isn't necessary. The wiper motor is located behind the differential lock actuators on the firewall - driver's side. There are three nuts (10MM) that you can remove and push the actuators and hoses out of the way. Be gentle as to not disconnect anything. WIS suggests disconnecting everything. Completely unnecessary.

The wiper motor is easily removed with 3 10mm bolts. There it is connected to the wiper arm assembly. Just pry a screwdriver in there and separate the motor from the assembly. It is a ball joint and pops out easily. Manually moving the wiper arms can make this easier to access.

Unplug the motor's electrical connection - and the motor is in your hands. The three bolts attaching a plate to the motor are what came loose on my G. I replaced them and used locktight to prevent them from getting loose again.

Re-install in the reverse order. Reconnecting the ball joint on the wiper arm assembly was easy using channel grips.

ONE NOTE: WIS suggested turning the wipers on for one cycle before fully re-installing. I tried and it appeared that my motor was dead. I went through an hour of attempting to diagnose the issue, including hunting down the fuse. Turns out the button that is depressed when you close the hood (probably for the alarm) must be depressed for the wipers to work. Hood up - wipers don't work. Doh!

This is a fairly easy project. And my wipers are perfect now!

I hope that this helps someone.!

 

[ve7hhs]

I second this. Had the same problem with my 2005 G500 Grand #42. I was able to catch it in time and re-tighten + loctite the screws before they fell out. All three were loose. Another few weeks and I would have been chasing screws down in the dash somewhere

Also on the DIY tips - if you can always reach around behind the hood and move the wipers to help with separating the ball joint or reassembly later.

I noticed that the main motor shaft had blue loctite on it nut. This wasn't the case for any of the three screws that hold the motor to the plate.

 

[Amnaggar]

Sorry to jump in.. but mine do that jerky motion on the way back.. smooth going up, but that gruntle sound and motion going down, creating those lines on the windshield.. irritating.. I guess that could be dryness from our scorching Dubai summer heat... don't know if there's a solution..

 

[traveller09]

Timely post

I have a new, to me, 2005 G500 Grand as well and I have noticed that the wiper blades seem to almost slam or smack down. I thought something was off but wasn't sure, now I am going to go investigate. Thanks!

 

[Sony Pierre]

Just one for future searches.

When I used the wipers on my G500 2005, it would make a lot of banging noise, as well as not returning to it's proper horizontal position when off.

(This truck is relatively new to me)

I have repaired it. Strangely, the 3 bolts holding a plate to the motor had completely come loose and fallen out. Strangest part of this is that the truck was purchased from West TX, where it rarely rains. Clearly these bolts worked their way loose over a long period of time. I realized that the motor was simply not attached to the vehicle and had tons of free play.

DIY tips.

First, the WIS procedure is somewhat helpful. All of the work can be done from the engine side of the firewall. There is very little room to work from the driver's footwell - and it isn't necessary. The wiper motor is located behind the differential lock actuators on the firewall - driver's side. There are three nuts (10MM) that you can remove and push the actuators and hoses out of the way. Be gentle as to not disconnect anything. WIS suggests disconnecting everything. Completely unnecessary.

The wiper motor is easily removed with 3 10mm bolts. There it is connected to the wiper arm assembly. Just pry a screwdriver in there and separate the motor from the assembly. It is a ball joint and pops out easily. Manually moving the wiper arms can make this easier to access.

Unplug the motor's electrical connection - and the motor is in your hands. The three bolts attaching a plate to the motor are what came loose on my G. I replaced them and used locktight to prevent them from getting loose again.

Re-install in the reverse order. Reconnecting the ball joint on the wiper arm assembly was easy using channel grips.

ONE NOTE: WIS suggested turning the wipers on for one cycle before fully re-installing. I tried and it appeared that my motor was dead. I went through an hour of attempting to diagnose the issue, including hunting down the fuse. Turns out the button that is depressed when you close the hood (probably for the alarm) must be depressed for the wipers to work. Hood up - wipers don't work. Doh!

This is a fairly easy project. And my wipers are perfect now!

I hope that this helps someone.!

 

[Sony Pierre]

Just one for future searches.

When I used the wipers on my G500 2005, it would make a lot of banging noise, as well as not returning to it's proper horizontal position when off.

(This truck is relatively new to me)

I have repaired it. Strangely, the 3 bolts holding a plate to the motor had completely come loose and fallen out. Strangest part of this is that the truck was purchased from West TX, where it rarely rains. Clearly these bolts worked their way loose over a long period of time. I realized that the motor was simply not attached to the vehicle and had tons of free play.

DIY tips.

First, the WIS procedure is somewhat helpful. All of the work can be done from the engine side of the firewall. There is very little room to work from the driver's footwell - and it isn't necessary. The wiper motor is located behind the differential lock actuators on the firewall - driver's side. There are three nuts (10MM) that you can remove and push the actuators and hoses out of the way. Be gentle as to not disconnect anything. WIS suggests disconnecting everything. Completely unnecessary.

The wiper motor is easily removed with 3 10mm bolts. There it is connected to the wiper arm assembly. Just pry a screwdriver in there and separate the motor from the assembly. It is a ball joint and pops out easily. Manually moving the wiper arms can make this easier to access.

Unplug the motor's electrical connection - and the motor is in your hands. The three bolts attaching a plate to the motor are what came loose on my G. I replaced them and used locktight to prevent them from getting loose again.

Re-install in the reverse order. Reconnecting the ball joint on the wiper arm assembly was easy using channel grips.

ONE NOTE: WIS suggested turning the wipers on for one cycle before fully re-installing. I tried and it appeared that my motor was dead. I went through an hour of attempting to diagnose the issue, including hunting down the fuse. Turns out the button that is depressed when you close the hood (probably for the alarm) must be depressed for the wipers to work. Hood up - wipers don't work. Doh!

This is a fairly easy project. And my wipers are perfect now!

I hope that this helps someone.!

Very nice text.
Thank You. You saved me a lot of money.

 

[spargett]

Thanks for sharing your experience texas993. My personal mileage varied on this issue.

On my 2003 G500, the wipers started clunking against the rubber windshield seal, rather dramatically.

The brackets holding in the differential lock actuators had 2 of 3 10mm bolts incredibly hard to access. Simple to remove in theory, but massive PITA for me.

The wiper motor was indeed held in place by 3 bolts through the firewall, but the heads of the bolts were on the cabin side of the firewall.

I had to remove the panels under the steering column to access these bolts. Took quite a bit of cursing and finding the thinnest 10mm socket to try and seat over the bolt head. There's a gasket that you'll have to mar a little bit in order get around the bolt head. I had a helper move the loose motor's placement around from the engine side to try and align best.

I was able to get 2 of 3 bolts tight again and the wipers are working perfectly.

Please see photos below.