Wierd blower motor problem - HELP !
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
Wierd blower motor problem - HELP !
After uncovering the car from sitting for awhile and cranking it up the blower motor wont come on. I tested the wires at the motor and putting the test leads from my meter into the plug that connects to the blower motor itself I show 12 volts. So it seems to have 12 volts positive and ground or I wouldn't get a reading.
After finding this I jumped in the truck and drove 60 miles round trip to get a blower motor. Installed it and still no blower motor running.
Suggestions?
Has anyone run into this before? This is the c68 electronic climate control setup.
After finding this I jumped in the truck and drove 60 miles round trip to get a blower motor. Installed it and still no blower motor running.
Suggestions?
Has anyone run into this before? This is the c68 electronic climate control setup.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Use a test light. It's too easy in the blower circut to have voltage and not enough amperage. This is so common that at least one tech in the last Chevy garage I worked at had fabricated a "test light" out of a headlight bulb .....
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
Sorry I didn't update this sooner. Got sidetracked redoing the door weather stripping.
The blower controller module is bad. I traced all the wires and when the blower motor itself is plugged in it reads 0 volts on the 12 volt power wire going from the module to the blower motor. With the blower motor unplugged it reads 12 volts like its supposed to.
The blower controller module is bad. I traced all the wires and when the blower motor itself is plugged in it reads 0 volts on the 12 volt power wire going from the module to the blower motor. With the blower motor unplugged it reads 12 volts like its supposed to.
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
I'll post the steps I did testing it with pics and the howto on changing it out. Just have to wait for the module to get here. Its an easy swap as I had to do this on the 86 I had.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
what year is your car? earlier cars used a fairly conventional and inexpensive series of resistors....however...on my 96 they were replaced by a circuit board and heat sink...which, if you can find one, is expensive
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
The year isn't what effects resistors vs circuit board. Its the manual vs automatic climate control that makes the difference. Mines an 87 but it as the electronic climate control so it has the blower motor controller module. The manual mechanical controls would of just had resistors.
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Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Sorry I didn't update this sooner. Got sidetracked redoing the door weather stripping.
The blower controller module is bad. I traced all the wires and when the blower motor itself is plugged in it reads 0 volts on the 12 volt power wire going from the module to the blower motor. With the blower motor unplugged it reads 12 volts like its supposed to.
The blower controller module is bad. I traced all the wires and when the blower motor itself is plugged in it reads 0 volts on the 12 volt power wire going from the module to the blower motor. With the blower motor unplugged it reads 12 volts like its supposed to.
