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Old 09-14-2020, 03:39 PM   #1
jpags729
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1999 SL2
Default 02 Sl2 Bosch Wiper Motor into 99 Sl2

Hey everyone! I have been having the typical trouble with the wipers only working in their top speed and having issues parking. Usually I put the key in and they go off on their own (in the sprayer function) and park wherever they feel like. As I am working from home I sent my dad to the local junkyard to pull a wiper motor. However, he wasn't familiar with gen 1 vs gen 2 vs gen 3 and pulled a bosch unit off of a 2002 Sl2. Looking at rockauto, their motors only go to 2000. Will I have trouble if I try to install this 02 unit in my 1999? Thanks!
...
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Old 09-14-2020, 06:26 PM   #2
hholbein
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1997 SW2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

I honestly don't know, but I'm very curious to see if it does work out.

*Electrically*, I think it should work. The reason I say that is that the same multi-function switch on the steering column shows as a common part from 1993 -->2002. That leads me to believe that the control wire from the switch must have the same resistors and sending the same voltages to the Bosch unit vs. the original Valeo unit, whose flakey controller has been the bane of many.

The bigger question is whether the Bosch unit + 2001 & 2002-era linkage will fit into the cowl area and mount right. The linkage is a different part number and I don't know whether this means the wiper shaft spacing or mounting hole is different.

I also don't know whether the Bosch motor + motor controller assembly can be successfully mated to a <=2000-era wiper transmission.

If you decide to give this a go, can you post back here what you find? Selfishly, I'd like to swap out my Valeo assembly for the Bosch one in the hope of fixing once and for all the weird wiper behavior of the Valeo unit.
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Old 09-14-2020, 10:04 PM   #3
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1997 SL2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

I think the only reason why the 01-02 motors are different from the 91-00 motors is the different linkage. Not sure if the electrical connector is the same or not. Iím also not really sure why Saturn wanted to change wiper motors and linkage the last 2 years of production
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Old 09-15-2020, 10:54 PM   #4
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1994 SL2
1994 SL2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Any idea what exactly fails on the older version wiper motor assembiies?

Is it brushes, or some plastic piece of hardware, or a circuit board or one of it's components?

GM trucks (and a lot more GM cars) from 88 to 99 had a recall on failing wiper motor assemblies. In that case the delay function quit working. But the low and hi speeds still worked. What failed was a solder joint on the original circuit board in the windshield wiper pump. Solder separated around the terminals of where a relay mounted through the board. It could be repaired by re-soldering the joint by putting massive amounts of solder on it to dissipate heat from too much current flowing through an under-designed circuit path. I have repaired the circuit board in my Suburban and the circuit board in my dad's Sierra pickup, after his 2nd wiper motor failed. In my case, I grabbed a board out of a junk yard truck's wiper motor, "fixed it", and swapped it in before mine actually failed. Then I "repaired" my original and dropped it in a box to save it for the "next time".

In the case of the truck wiper motor, it's a VERY SIMPLE repair. Wherein you don't even have to remove the wiper motor from the vehicle. Just remove the windshield wiper pump cover off the motor.


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Old 09-16-2020, 07:34 AM   #5
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1999 SL2
2001 SL1
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Came across this on Rock Auto when seeking a wiper motor for my 99 SL2. It might apply to the OP's issue. Worth looking at ....



Attached Images
File Type: jpg Wiper Motor Grounding Issue.JPG (76.2 KB, 58 views)
...
1999 SL2 MT (287,130 km @ 10/2019)
2012 Ford Focus SEL HB MT
2011 Suburban LT

Past Saturns
2001 SL1 MT (438,500 km 11y)
1993 SW2 AT (10y)
2001 LW200 MT (3.5y)
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Old 09-16-2020, 09:09 AM   #6
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1999 SL2
1998 SC2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Quote:
Originally Posted by trottida View Post
Came across this on Rock Auto when seeking a wiper motor for my 99 SL2. It might apply to the OP's issue. Worth looking at ....
Thanks trottida!
...
Bryan Cotton
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Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
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Old 09-16-2020, 12:46 PM   #7
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1997 SW2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Quote:
Originally Posted by PrestonIII View Post
Any idea what exactly fails on the older version wiper motor assembiies?

Is it brushes, or some plastic piece of hardware, or a circuit board or one of it's components?

GM trucks (and a lot more GM cars) from 88 to 99 had a recall on failing wiper motor assemblies. In that case the delay function quit working. But the low and hi speeds still worked. What failed was a solder joint on the original circuit board in the windshield wiper pump. Solder separated around the terminals of where a relay mounted through the board. It could be repaired by re-soldering the joint by putting massive amounts of solder on it to dissipate heat from too much current flowing through an under-designed circuit path. I have repaired the circuit board in my Suburban and the circuit board in my dad's Sierra pickup, after his 2nd wiper motor failed. In my case, I grabbed a board out of a junk yard truck's wiper motor, "fixed it", and swapped it in before mine actually failed. Then I "repaired" my original and dropped it in a box to save it for the "next time".

In the case of the truck wiper motor, it's a VERY SIMPLE repair. Wherein you don't even have to remove the wiper motor from the vehicle. Just remove the windshield wiper pump cover off the motor.


Preston
In most cases I've seen here, the issue with the 1993->2000 Valeo? unit is a flakey wiper motor controller, not the motor itself or the washer pump. The motor controller is the matchbox-sized box next to the motor. Symptoms are usually loss of intermittent or slow speeds, wipers going nuts and not turning off, or erratic washer action. Usually high speed/12v on the sense wire from the column stalk switch works OK, and usually the single wipe command.

The column switch seems to be pretty simple/robust to me, with the exception of a weak solder connection for the rear wiper on wagons that occasionally get fatigued with use and needs to be resoldered.

I did check my ground connection when I had the wiper out 5 years ago and it was good, but always worth doing when you've blown 2 hrs on fixing the silly thing.

The other PMs I recommend when you have your wiper motor exposed in the cowl: 1) take the linkage apart and clean/regrease it; 2) clean up decades of silt at the bottom of the cowl sump it sits in; 3) take out the duck-bill rubber drain for the cowl (center firewall) and give that a good scrub in soapy water; 4) check the cowl vent screen to see if the foam sandwich is still together and adhered to the body with silicone.
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Old 09-17-2020, 01:48 AM   #8
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Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

I renewed the wiper motor in my '97SW with replacement mfgd in Korea, i think
(but maybe Taiwan) via RockAuto; don't think available any more... worked faultlessly for 80kMiles.

On my 2000SW, i cleaned up the cowl area (and painted sections with
some rust encroaching).

I could be bonkers ... but the access to the wiper in the cowl seemed
very tight/cramped/restricted. (no further info)
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Old 09-17-2020, 04:48 PM   #9
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1996 SL1
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Just replaced mine(Autozone) on my 96 SL1 and it's TIGHT in there. Had to temp fix the old transmission bar.Got the New Transmission linkages from Rockauto Worked for a while. Got it lined up correctly with the help of a post here! Wipers worked great and responded well to the steering wheel switch for a few months. Now it's back not shutting off and wipers come on by themselves! Haunted! Thanks for the tip on the Ground bolt..Will check!
...
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Old 09-19-2020, 09:56 AM   #10
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Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

I do think there are two classes of failure on the Saturn S:

(1) bad connection (ground, cracked cold solder blade terminals, and maybe
through the multifunction switch sometimes)

(2) 'bonkers' controller, which energizes wipers variously whenever, and often
when the selector switch commands the unit OFF.

......

I drove a commercial work vehicle, Chevy -'95 3500- where the wiper degraded
to the point that the only conditions when it would operate,
were clear/dry fair weather....
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Old 09-19-2020, 08:48 PM   #11
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1999 SL2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Hi everyone:

Have yet to take out my wiper motor from my car as I was planning on grabbing the linkages from the junkyard car as well to see if it would transfer over. Gonna take lots of pictures once at the JY. I'll let you all know how I make out.
...
Current:
1999 Saturn SL2 1.9 "Sophia Loren 2"
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1993 Chevy Camaro Z28 5.7

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Old 09-25-2020, 09:26 PM   #12
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Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Update: the Bosch motor would not work due to the fact that it was from an Ion as my dad got the models mixed up. Clearly he needs a refresher on his Saturn history. Went to the JY with him and grabbed a 2000 SL2 wiper motor although this one was reman. Currently prepping to put it into the car when I get a warmer weekend to do so.

So if anyone has an ion and wants a Bosch wiper motor feel free to DM me.
...
Current:
1999 Saturn SL2 1.9 "Sophia Loren 2"
2008 Honda Accord EX-L 2.4
1993 Chevy Camaro Z28 5.7

Previous:
2007 Chevy Malibu LS 2.2
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Old 09-25-2020, 09:27 PM   #13
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1999 SL2
Default Re: 02 Sl2 Bosch Wiper Motor into 99 Sl2

Quote:
Originally Posted by trottida View Post
Came across this on Rock Auto when seeking a wiper motor for my 99 SL2. It might apply to the OP's issue. Worth looking at ....



thanks for this! Will definitely be checking both the new and current one in the car for any ground issues.
...
Current:
1999 Saturn SL2 1.9 "Sophia Loren 2"
2008 Honda Accord EX-L 2.4
1993 Chevy Camaro Z28 5.7

Previous:
2007 Chevy Malibu LS 2.2
2003 Nissan Altima SE 3.5
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