Discussion in 'General Ranchero Help' started by andy nelson, Dec 5, 2018.
any help? It’s a 74 model...not sure if it’s not getting power or motor locked up..TIA
Pull the power lead off the motor and check for power at the plug. Fuses, resistors, switches are possible issues. Power the fan motor while disconnected to test. Some of the blower motors are hard to find and if
you remove the motor, be careful with the squirrel cage, those can be hard to find as well on certain years.
The blower motor resistors go out a lot on these older cars. Not sure where your is. GM's were on the firewall. Cheap, and easy.
Here's the problem outlined on a Torino forum.
There is a blower motor resistor in line with the blower motor lead. The resistor is located in the blower case. It has 3 resistors that vary the current to the motor to control it's speed.
If the blower motor resistor has failed, and they often fail on only one or two of the resistors or can fail across all of them, the blower motor won't run in the fan speed selected that uses that resistor. The sketch below shows the location of the resistor, and is shown circled in the sketch below, it is held in the blower case with a couple of plastic push rivets - (hint: it is inside the cab approximately directly above the right side of the transmission hump, basically above the passenger floorboard):
Other things to check: Ensure the blower ground has a good connection to the cowl, that your block to firewall ground is present and has good connection, and check the fuse in the panel.
Thanks I’ll check that this weekend!
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