Wiper Motor and Blower Motor - Ford Ranger Forum

Point10drummer · 12-31-2009, 09:54 AM

I have a problem I have not been able to figure out. My windshield wipers and my heater blower motor only work on the "high" position. I've changed the wiper motor and it has not helped. Are these things connected through a fuse or something or is it just coincidence that both motors are only working on "high"? This is a 1992 Ford Ranger

Point10drummer · 12-31-2009, 09:57 AM

Quote:

Originally Posted by Point10drummer

I have a problem I have not been able to figure out. My windshield wipers and my heater blower motor only work on the "high" position. I've changed the wiper motor and it has not helped. Are these things connected through a fuse or something or is it just coincidence that both motors are only working on "high"?

By the way - this is a 1992 Ford Ranger

90RedRanger · 12-31-2009, 07:25 PM

It could be the wiper switch is bad, and the blower motor has a bad resistor. The resistor gives you the slower speeds. When you place the switch on high, the resistor is bypassed and it runs full bore. The wiper motor has a resistor too. But if you replaced it, it looks like it may be a bad wiper switch.

Point10drummer · 01-04-2010, 11:49 AM

Thanks Red Ranger - I replaced the wiper switch but still have the same issue...Any ideas?

90RedRanger · 01-05-2010, 11:34 AM

Ok, I am going to look at my wiring schematic to see if and how these two might be connected. I don't think there is a link with the two circuits. It could be a cut wire or even a bad connection.

94mtx · 01-06-2010, 01:15 PM

Quote:

Originally Posted by 90RedRanger

Ok, I am going to look at my wiring schematic to see if and how these two might be connected. I don't think there is a link with the two circuits. It could be a cut wire or even a bad connection.

I had the same problem with my 94. The blower would only work on high. I did some research and found that the blower motor resistor was bad. Actually it was melted. I replaced the blower motor resistor (rockauto.com) and the wire harness (rockauto.com). I paid a little under $30 with shipping for both parts. It worked. Now I have all 5 speeds for the blower motor.

I recommend rockauto.com to anyone for oem factory replacement parts. They are cheaper than the local parts stores even with shipping.

90RedRanger · 01-08-2010, 01:27 PM

I found out with my book that the wiper circuit and blower circuit don't work together. They are on separate fuses. The blower motor probably just needs a resistor. The wiper motor has a (internal governor) that is part of the motor assembly. If you replaced the motor and wiper switch and it still does the same thing, it's probably a broken wire or bad connection. Connectors get dirty so you need to check all of the wires related to the wiper circuit.

12-31-2009, 09:54 AM	#1
Point10drummer Junior Member Join Date: Dec 2009 Posts: 3	Wiper Motor and Blower Motor I have a problem I have not been able to figure out. My windshield wipers and my heater blower motor only work on the "high" position. I've changed the wiper motor and it has not helped. Are these things connected through a fuse or something or is it just coincidence that both motors are only working on "high"? This is a 1992 Ford Ranger Last edited by Point10drummer; 12-31-2009 at 09:58 AM.

01-04-2010, 11:49 AM	#4
Point10drummer Junior Member Join Date: Dec 2009 Posts: 3	Wiper/Blower Thanks Red Ranger - I replaced the wiper switch but still have the same issue...Any ideas?

01-05-2010, 11:34 AM	#5
90RedRanger Junior Member Join Date: Mar 2009 Posts: 17	Wiring Ok, I am going to look at my wiring schematic to see if and how these two might be connected. I don't think there is a link with the two circuits. It could be a cut wire or even a bad connection.

01-08-2010, 01:27 PM	#7
90RedRanger Junior Member Join Date: Mar 2009 Posts: 17	Wiring I found out with my book that the wiper circuit and blower circuit don't work together. They are on separate fuses. The blower motor probably just needs a resistor. The wiper motor has a (internal governor) that is part of the motor assembly. If you replaced the motor and wiper switch and it still does the same thing, it's probably a broken wire or bad connection. Connectors get dirty so you need to check all of the wires related to the wiper circuit. Last edited by 90RedRanger; 01-08-2010 at 01:32 PM.

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12-31-2009, 07:25 PM	#3
90RedRanger Junior Member Join Date: Mar 2009 Posts: 17	It could be the wiper switch is bad, and the blower motor has a bad resistor. The resistor gives you the slower speeds. When you place the switch on high, the resistor is bypassed and it runs full bore. The wiper motor has a resistor too. But if you replaced it, it looks like it may be a bad wiper switch.

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