Bulb help
How difficult is it to change this bulb. I'm a night school student and don't have time to do much work on cars myself. Is this replacement something a regular repair shop (non-Audi specific) could handle? Thanks.
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Tools Needed:
Phillips Screwdriver
Small Phillips Screwdriver
Soldering Iron
Radio Shack Micro Bulb (#272-1092C)
Procedure:
1) Remove Instrument Cluster. This can be done in two simple steps. First, remove the top portion of the steering column cover by removing the two screws that come up from the lower section. Once the cover is removed two screws will be revealed that hold in the instrument cluster. Remove these screws and carefully withdraw the instrument cluster making sure to disconnect all the wiring harnesses attached to the rear of the cluster.
2) Once the instrument cluster is out remove the outside temperature display. You will have to remove four small screws; two are used to hold in the display unit itself and two more are used to hold down the wiring harness.
3) The next step is to pull the outside temperature display apart. There are two small screws in the back of the unit as well as electrical tape wrapped around the seam. Remove the two screws and take the tape off.
After this is done the unit can easily be pulled apart. BEFORE pulling the unit apart be sure that the plastic white tabs at the front of the unit are facing up. Once apart the bulb is apparent...it sits in the middle of the
circuit board!!
4) After pulling the unit apart put the plastic case to the side (making sure to keep the white tabs up). Now you have to slide the plastic rear
cover away from the circuit board. Take your time and slide the rear of the case along the wires so that you can get your soldering iron to the circuit board.
5) Remove the old bulb. I was able to do this by heating up the solder on the bulb connections while pulling the bulb away from the board. (This would be much easier with three hands) I just switched back and forth between the two connections and after a few minutes the bulb pulled out.
6) Install the new Radio Shack micro lamp. I used the same "alternating heat" process to install the new bulb.
7) Once the new bulb is in, reassemble the display unit. Assembly is the reverse of disassembly. Note: There is no need to re-wrap the seam with electrical tape.
The above procedure took me a total of 45 minutes. That's it......you will now know the temperature even when it's dark out!!
Disclaimer: This write-up was used to repair the outside temperature display in my '90 80q (installed from a '94 90). I know that the same display unit was used up to the '95 90's. The procedure outlined below is for the 80/90 models. It may work on other models but there could be slight differences. This information is provided as an aid to work by and in no way is a guarantee of positive results. Use at your own risk!!
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It's real simple to do!!
HTH!!
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Andrew
90 80q
91 90
95 90q



