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Old 07-21-2011, 04:39 PM   #1
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Wiper question

89 thomas

wiper switch has 4 wires
I am assuming that 1 is hot, one is ground, 2 for slow and high speeds.
Do I have to have the ground hooked to the switch? I have a 3 pole DPDT switch.
I took the ground off the original and wipers still work.
SO, do I have to have the ground hooked up?
by the way, the ground wires on the switches are colored white on one and black on the other
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Old 07-22-2011, 09:53 AM   #2
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Re: Wiper question

Unless the switch works by grounding whatever it is controlling,which is rare, there would be no reason have a ground wire to the switch.
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Old 07-22-2011, 10:29 AM   #3
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Re: Wiper question

I unhooked what I think is the ground wire, having 3 wires to the switch left on, they still worked, so I dont know, guess I will get out the meter. Its funny though, one is white on one switch and the other is black on the other.....
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Old 07-22-2011, 11:39 AM   #4
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Re: Wiper question

aslong as you can figure out what each wire does and you hook em up accordingly, should be fine. lol if you're paranoid put a fuse before the switch
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Old 07-22-2011, 09:02 PM   #5
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Re: Wiper question

#1 wire from fuse panel
#2 wire from harness-it is hot when turned on
#3 wire to slow speed wipers *note same harness
#4 wire to fast speed wipers * note same harness
wipers will work with #2 unhooked
wipers will not work if #1 unhooked
could this be an illuminated switch that has a blown bulb maybe?
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