Where is the ac - heater fan fuse on a 2003 Toyota Echo?
It is not a fuse. It is a relay switch located in the same location as the fuses - it is next to the right fender if you are facing the front of the vehicle and looking under the hood. The fuse box is clearly labeled and any beginner can replace the relays because they are easy to plugin and unplug. On my 2000 Echo, I think fan blower relay #1 was out so I replaced the relay that was labeled as such. The underside of the fuse box cover clearly labels each relay in the fuse box.
There are really only 2 electrical components to the heating system: Blower motor Temperature blend door actuator From the Windstar OWNERS MANUAL... 1995-1998 Heater control switch & blend door actuator - fuse #21 1999-2003 Front Heater control switch & blend door actuator - fuse #10 1999-2003 Rear Heater control switch & blend door actuator - fuse #8 1999-2003 - FRONT Blower Inside fusebox: relay #3 Engine compartment fusebox: fuse #120 1999-2003 - REAR Blower Inside…
Since you need to use a code reader to find out what the problem is anyway, use the code reader to turn off the light while you are at it. Not sure why anyone would want to do it another way, but you can also disconnect the negative terminal on the battery, or pull a fuse in the fuse box below the steering wheel. You might lose your radio presets doing this.