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My right side of this center dash window light that displays the temp.reading also went out on my 2003 4Runner. The letters & number were readable, but the back light was out to see everything at night. My mechanic said the bulb was out and he had to pull the section off surrounding the whole center dash portion that encompasses the radio, mileage, a/c & radio section. I left it up to them to do, since they said it would take an hour. Now the whole section lights w/o any problems.
To give you a better jump in the direction of the repair, your vehicle's computer operates OBD I, your average auto parts store will only carry OBD II equipment. Your ALDP should be located on the drivers side under the dash near the door. This is the most typical location for it, however, not the only location. From time to time you may find on either side of the center console under the dash, closer to the firewall. Some vehicles even have a special port on the dash near the drivers door just for the link. You can buy a OBD I link that will attach and put the computer into diagnostic mode. Any such link should have a code guide as well. When you attach the jumper and turn the ignition on, the MIL (maintenance indicator light) will begin to flash. You will see breaks in the flashes to distinguish numbers. This will give you the readout of the trouble code. If the system tells you that the vehicle has an O2 sensor problem, simply replace the corresponding sensor. As OBD I only reads system failures and not variations in data, the computer will only trigger a MIL when a sensor fails. Hope this helps.
I would not suggest repairing yourself. Sounds like a blend door actuator. Not to sure on a toyota because i know more about domestic but i believe that the dash needs to be taken apart to replace this part or to atleast examine your duct work behind the dash. Hope this helps! ~Derek~
remove steering wheel speedo clock column switches heater controlls time clock,,basically evertin in the dash even glove box possibly steering shaft also,,,then youl see all the bolts and screws that hold it in ,,,plenty of ten mil bolts in the left and right side of the dash on the bottom and so on,,some bolts could be hidden behind the air vents too not sure though go gently,,,youl do it ,,,
replace window control switch.on driver side.if dash lights go out one by one.you have to replace dash board light bulbs you have to remove the bezel or instrument cluster.disable air bags before working on dash.change the brake light switch..
Try this before you pull the dash. Turn the ignition switch on, then, by hand, move the turn signal on an off slowly, while at the same time look under the dash. As the turn signal goes on and off each time you move the handle, you will be able to hear it click. Follow the click and you may find it is within reach without pulling the dash. Bill ASE Master Technician