Yes, it is possible, note the diagram, manual hvac. If you pull fuse for load side of relay, it should kill the blower motor. Then you have control side of relay, left side in diagram, has to have voltage and ground. The voltage is only hot with key on. So if that side has voltage with key off, either something wrong with ignition switch or the circuit is shorted to voltage. See the line with arrow head, when relay is energized that line moves to other terminal and the circuit carries voltage to blower motor.
SOURCE: Where would I find the blower/fan relay on a 2005
It would be under your glove box. if your blower motor only blows on hight you need a transistor it is in the same location under the glove box.
SOURCE: 2007 Toyota carolla will not start. When you turn
Get someone to jump start you might just be a dead battery. let it run for a few then turn it off and try starting it again. if its the same result have your battery and alternator tested. (battery would be the easiest to test first either somewhere like wal mart they test for free. 12.4-12.6 is considered charged 11.5 is considered DEAD) if they come back fine i would check for parasitic draw but it shouldn't cause it to drain the power in the time you turn the key off and back on. also the starter is a possibility.
SOURCE: problem in my toyota carolla 2001 model
You need to bring it in for sevice to find out what the engine codes that triggered the light are.
SOURCE: replace blower fan relay
You need to replace the blower resistor. In should be in the blower housing under the hood.
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