I can get the fan to go past speed 2 out of 4. I have changed the blower and the resistor.
Country: United StatesMake: ToyotaModel: 4RunnerYear: 1993Engine: 3.0
Have changed blower and resistor
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Just to clarify you're saying that when the blower motor switch is placed on low and the next speed those are the only two speeds that make the blower motor work. does the blower motor work on high?
it works but it turns at the low speed
When you place it in the high position all the way to the right and back one notch you're saying that the fan only blows at low speed? Do you have automatic climate controls are or these manual air-conditioning controls?
Yes that is correct it turns @ low speed in1,3 & 4 and it is manual control
When the blower switch is placed in the high position this bypasses the blower resistor. Power comes directly from the 40 amp heater circuit breaker goes through the blower motor by way of the red wire at the blower motor and back out through the blue wire with a black tracer to the heater blower switch then to ground. If you're only getting low-speed on the blower motor in the high position this means there has to be high resistance in the blower motor switch or in the ground circuit. There is one splice connector but I would be surprised if that had any corrosion in it. As a test turn the blower switch to the high position make sure the blower motor is spinning at low speed then take a jumper wire and ground the blue wire with a black tracer either by back probing the connector or by piercing the wire and With the other end of the jumper wire to a good metal ground. If this makes the blower motor run on high-speed then you know you have a corrosion issue upstream between there and the blower switch or the blower switch itself is bad. Let me know how this works and we can go from here.
Toyota Master Diagnostic