Fan switch problem?
05-07-2010, 07:59 PM
#1
Registered User
Thread Starter
Fan switch problem?
My heater/ac fan on my 85 4runner only works on the medium high and high settings it seems I saw a reference to this being a common problem I did a search but didn't really find anything.
I could do some hands on diagnostics and figure it out but if its a common problem any insight would be greatly appreciated.
I could do some hands on diagnostics and figure it out but if its a common problem any insight would be greatly appreciated.
05-07-2010, 08:48 PM
#2
Registered User
It's the blower motor resistor. Located in the blower housing, you will be able to see it when looking up under the dash at the blower motor. It has a little clip connection, and is held in place by 1 philips screw.
The reason you have high is because low puts the most strain on the resistor, and so on up the line. You will always have Hi because that current setting doesn't flow through the resistor.
$10 @ autozone
The reason you have high is because low puts the most strain on the resistor, and so on up the line. You will always have Hi because that current setting doesn't flow through the resistor.
$10 @ autozone
05-07-2010, 08:51 PM
#3
Contributing Member
iTrader: (3)
This may help too: http://www.4crawler.com/4x4/CheapTricks/Blower.shtml
05-07-2010, 08:52 PM
#4
Registered User
Beat me to it Logan. 
I swapped mine with a pristine looking J yard resistor. Works like a champ.
I swapped mine with a pristine looking J yard resistor. Works like a champ.
08-06-2011, 07:39 PM
#6
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It's the blower motor resistor. Located in the blower housing, you will be able to see it when looking up under the dash at the blower motor. It has a little clip connection, and is held in place by 1 philips screw.
The reason you have high is because low puts the most strain on the resistor, and so on up the line. You will always have Hi because that current setting doesn't flow through the resistor.
$10 @ autozone
The reason you have high is because low puts the most strain on the resistor, and so on up the line. You will always have Hi because that current setting doesn't flow through the resistor.
$10 @ autozone
The part # for 84-85 is JA1369 $19.99 + tax
Last edited by Classictint; 08-06-2011 at 08:19 PM. Reason: Found part #
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