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Old 08-20-2013, 11:20 AM   #1
speedmachine
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Join Date: Jun 2007
Location: ontario,Canada
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1987 gmc wipers wont go in high speed

hello

my wipers work in low speed and when i squirt but they just shut off when i put them in the high selection.

i swapped the signal lever with another to see if it was that but i had the same issue

can someone point me in the right direction, what should i be looking for?

thx
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Old 08-20-2013, 11:30 AM   #2
speedmachine
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Re: 1987 gmc wipers wont go in high speed

i forgot to mention, i also tried another wiper motor and same problem, id assume its some kind of wiring issue maybe. does anybody have a schematic?
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Old 08-20-2013, 10:49 PM   #3
hrc200x
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Re: 1987 gmc wipers wont go in high speed

http://67-72chevytrucks.com/vboard/s...d.php?t=545416 very helpful. Just pick your year. Files are large for older computers or slow download speeds, but worth the wait. I think its the service manuals that give a breakdown on troubleshooting wipers step by step.
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Old 08-21-2013, 12:46 PM   #4
chengny
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Posts: 349
Re: 1987 gmc wipers wont go in high speed

Diagnostic procedure for; lows work - no high

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