Have heat but no high med or other?
SOURCE: Toyota tacoma heater fan runs slowly in the 3rd & 4th positions
Using a voltmeter, the resisted voltage values for the fan motor are as follows:
LOW- 3 VDC
Med LOW - 6 VDC
Med HIGH - 9 VDC
High - 12 VDC
The fan resistor gets 12 volts from each position of the fan switch, and the 12 VDC is then lowered thru each of the 3 internal resistors inside the fan resistor. My guess is that the resistor has failed, and the resistance wires contained on it may have meshed together. The resistor is on the black box between the blower motor housing and the center of the dash. 2 phillips screws hold it in. Easy to remove/replace. Hope this helps, and thanks for choosing FixYa.
SOURCE: 2001 Toyota Tacoma- turn lights not working and cruise control
fuses???
Check relays.....
Harness grounds, engine ground,
Check the trailer harnes for short.
Vitally
SOURCE: 2006 Toyota Tacoma heat/AC fan runs on high only
replace the blower motor speed control resistor.
SOURCE: no heat in my 2006 toyota tacoma heater core is
Absolutely. There are "blend doors" that send the air across the heater core or around it. If they stick or the switch that controls them malfunctions -- no heat. Good luck.
SOURCE: Heater fan only works on High for my 2005 Toyota
That resistor usually doesn't go as quickly in just five years, although, it is possible. I would salso have the blower switch and wiring to it checked. Thanks, Dana
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