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Old 10-20-2010, 04:35 PM
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Wiper motor wiring

I am working with a friend who has a 59 Chevrolet Pickup.We are trying
to wire his wiper motor to the wiper switch.This is a 2 speed wiper.
Does anyone out there know if the factory used a wiper switch with
3 terminals?The aftermarket switch has 5 terminals marked B,P.H AND L.
Is there a website that might show oem wiring? Thanks
79 Z28

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Old 10-20-2010, 06:50 PM
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a 59 2 spd wiper switch will have 3 wires
low
hi
wash

the wiper power is provided by an ignition circuit (on the car, same wire feeds blower motor)

the switch only provides the ground circuit.

the wiper motor must be properly grounded, and the switch needs to also have a good ground to the dash.

I don't have my drawing handy (travelling) or else I would post for you.

the switch grounds one position on the motor for low, and grounds 2 positions for hi.

the third ground lead is for the wash portion of the wiper motor/pump
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Old 10-20-2010, 07:05 PM
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Wiper Wiring

Brian59EC,
Thanks for the info.I thought the switch only provided ground.
The Switch that my friend is using is an aftermarket type
I think we need to find a three wire switch because the switch he has
will not ground both high and low to give a low setting. John
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Old 10-20-2010, 08:25 PM
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wipers

i think the way to go about that is to find witch pin on your motor is groung, then low, then high. your switch prob has a comman ground and 1 for intermittent then high and low. ohms meters on switches work great. google 59 chevrolet wiring at general motors.com
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Old 10-21-2010, 08:19 AM
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wiper

bifwrench43,
Thats the problem with the aftermarket switch.No common ground.
Trying to find a three wire like OEM. John
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Old 10-21-2010, 11:06 AM
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Do you want to have 'washer' functionality? Do you have a 'Single' or 'Dual' wiper motor setup.

The 'Single Motor/No Washer Fluid' switch has three prongs. A 'Dual Motor' Switch will have five. See the link below. The image shows the 'Dual Motor' switch.

**************************************************

Hope this helps.

Last edited by T-bucket23; 10-27-2010 at 09:07 AM. Reason: Advertising. Please see: commercial posting guidelines.
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Old 10-21-2010, 01:28 PM
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wiper

Street Rod Electrics,
This is a dual wiper motor.Do not need washer function but in order
to have a low both high and low must be grounded at the same time
hi only needs the hi to be grounded .low wire grounded by itself
reverses the motor for park.This goes against everything I have read
on these post
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Old 10-21-2010, 02:24 PM
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This is the factory wiring diagram.
See attached.

vicrod
Attached Files
File Type: pdf GM wiper-washer diagram.pdf (333.0 KB, 588 views)
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Old 10-21-2010, 03:23 PM
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wiper motor

Vicrod,
Thank you for the wiring diagram now all I need to find is the correct
switch that grounds both high and low for low speed wiper and ground
for high only. John
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Old 10-21-2010, 03:46 PM
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A switch from 59 to up to around 67/8 will do what you need it to do.
A 66 switch knob will have a hole in it for the wash button, but I believe the rest the whole knob will depress for the was function.

The 59-66 wiring is a separate harness from the switch to the motor/pump
dk blue, lt blue, black.

I'll be home friday night for a couple of days and will have a closer look at my 59. and perhaps provide a pic of the wiring and pins.
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Old 10-21-2010, 07:45 PM
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wiper motor wiring

Bryan59EC
Thanks for the info.I ordered a switch from Street Rod Electrics
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Old 11-08-2010, 08:22 AM
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wiper switch wiring

Bryan59EC,
I am unable to find the correct switch so far.When I test the motor
on the bench in order to have low speed I have to ground both
low and hi terminals.Hi requires only one terminal on the board to
ground.This is a 2 speed motor with only 2 wires in a Plastic T.
There are 3 spade terminals on the board.1 terminal is the +12 Volts
for the motor.When I got the motor it had the plastic t attached
to two terminals and one open spade terminal.When I read the other
post it says just the hi speed need 2 terminals grounded while low
speed has on one terminal grounded with ground to the motor and
switch at all times.Is this correct? Thanks for your time
JB
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Old 11-08-2010, 01:59 PM
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Allied Electronics sells a line of stackable rotary switches that will work for GM wiper motor control. NKK # HS16-2N. Is a 2 pole 3 position switch rated at 12 amps.
The diagram I attached before will show how to wire it.
You need to check if the park/off relay, which is integral to the motor housing, is working.
Test this by sequencing the motor through the following steps.
1- ground both wires for LOW speed.
2- ground only the High wire for HIGH speed.
3- ground only the low wire for PARK/OFF. In this mode the motor will continue run until it opens the park relay to stop the motor.

vicrod

Last edited by vicrod; 11-08-2010 at 02:21 PM.
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Old 03-25-2011, 12:05 PM
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Wiper Switch Wiring

Good day all,
I am still trying to hook up a wiper motor for a friends 59 Chevy P/U
When I wire the switch to the motor it works hi and lo and park but
does not shut off in any position on the switch.When the switch is
in the off position the motor reverses but keeps running.Any ideas?
Motor and switch are grounded during these test.Thank you for any help
John
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Old 03-25-2011, 03:32 PM
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Assuming that you have the correct switch and it is wired correctly the only thing remaining is the gearbox relay which opens the circuit to the motor when the wipers park. This is integral to the wiper motor.
Try to apply a mechanical load to the motor to simulate the wipers. This may help simulate the operation in the park mode so that the gearbox relay can operate as if it were installed in the truck.

vicrod
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