See what I mean by "Those geometric relationships require a little
concentration to keep
straight."? I GOT IT WRONG! To INCREASE the sweep
arc width, move the linkage AWAY from the idler pivot. Likewise the motor
end of the linkage needs to move AWAY from the motor for MORE arc. I
shouldn't try to think in the middle of the night -- MAYBE I've got it
right this morning.
Try it, you'll figure it out!
Ken H.
On Sun, May 23, 2021 at 4:48 PM Ken Henderson
wrote:
> First off, you need to check where the wiper motor arm is positioned when
> the blades are parked. If it's not at the 6:30 o'clock position, you need
> to turn the wipers OFF with the ignition ON, then reposition the arm to
> that position, holding the arm with a wrench ANY time you turn the motor
> nut, to protect the motor's gears. Now, if the arms are not where you want
> them to park, you'll have to remove the arms from their pivots and
> reposition them.
>
> You'll have to wet the windshield thoroughly before testing the results,
> and even that won't fully simulate driving in a heavy rainstorm. You may
> have to make further minor adjustments after such an event. There are two
> other adjustments available for that purpose:
>
> 1. The linkage between the motor arm and the idler assembly adjusts the
> POSITION of the sweep arc only (If you adjust that, be SURE to tighten the
> jam nuts before going for a test drive -- the parts WILL loosen themselves
> and become lost).
>
> 2. The three holes in the arm of the idler assembly are for adjustment of
> the WIDTH of the sweep arc. The closer the linkage is attached to the
> pivot of the assembly, the wider the sweep arc will be, and vice-versa. If
> that adjustment does not give you sufficient range, or granularity, making
> the linkage attachment hole in the motor arm slightly oval, toward the
> motor shaft, will provide a narrower arc and the linkage can be tightened
> anywhere within that oval for fine tuning. Those geometric relationships
> require a little concentration to keep straight.
>
> Don't try to make the wipers sweep too far to the outside, via either arc
> width or position -- at high speed, the movement up the slope of the
> outside windshield will impart a force vector away from the surface of the
> glass and the blades will actually lift from the glass for part of their
> arc.
>
> HTH, if not, try me again.
>
> Ken H.
>
>
> On Sun, May 23, 2021 at 2:41 PM Lawrence Belland
>
>> How can you adjust the wiper sweep with the electric wipers without having
>> it stop 1/4 of the way up the windshield?
>>
>> On Sun, May 23, 2021 at 7:34 AM Ken Henderson
>>
>> > Not yet. I have to get them to bdub for posting on the web site. There
>> > are only a few, nonessential, words in addition to that paragraph.
>> >
>> > Ken H.
>> >
>> >
>> > On Sun, May 23, 2021 at 9:39 AM John Wright
>> >
>> > > Shortcut to new instructions?
>> > >
>> > > JR Wright
>> > > > On May 23, 2021, at 9:30 AM, Ken Henderson
>> > > >
>> > > > Attention All Users of Electric Wiper Motors
>> > > >
>> > > > As a result of a power steering system failure I recently
>> experienced,
>> > > I've
>> > > > just created GMC Electric Wiper Instructions - Rev 4.18. The main
>> > > feature
>> > > > of that revision is the inclusion of the paragraph italicized below:
>> > > >
>> > > > *This installation replaces the OEM hydraulic wiper motor with its
>> > > > integrated power steering fluid filter. That filter should probably
>> be
>> > > > replaced with an in-line filter installed in the return line from
>> the
>> > > power
>> > > > steering box to the pump reservoir. A large, metal-bodied filter is
>> > > > recommended; clogging of that filter can result in high fluid
>> pressure
>> > in
>> > > > unintended locations and consequent failure of the power steering.*
>> > > >
>> > > > While the absence of a filter has not resulted in any failures of
>> which
>> > > I'm
>> > > > aware, it is good practice to include an adequate filter in any
>> active
>> > > > hydraulic system. Most vehicles seem to include one in their power
>> > > > steering systems these days.
>> > > >
>> > > > Your choice -- it will be a slightly messy chore, but may protect
>> your
>> > > > hydraulic system from premature wear.
>> > > >
>> > > > Ken Henderson
>> > > > GMC Electric Wiper Upgrade Inventor/Seller
>> > > > _______________________________________________
>> > > > GMCnet mailing list
>> > > > Unsubscribe or Change List Options:
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>> > > GMCnet mailing list
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>> > >
>> > _______________________________________________
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>> >
>> --
>>
>>
>> O: 503-987-8776 C: 503-740-7737
>> Lawrence
>> *CCB#*: 212656 *WALIC#*: JUSTR**813Q7
>> *NRPP#*:110989 RMT *NRSB#: *200G006
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