Here was my message I posted a few days back stating the problem:
http://www.brickboard.com:80/RWD/volvo/1465441/220/240/260/280/uncommon_speedometer_problem.html
Both speedometer/odometer do not work.
After the post I made about it's problems I pulled the speedometer board, cleaned it, reflowed some solder joints and still the same problem.
The one thing that makes both speedometer/odometer function is pulling back on the high beam switch just at the point before the highbeams switch on/off it will function-if you hold it at that position.
I took a quick look yesterday at the speed sensor and there was a bit of oil leaking. I haven't yet fiddled around back there as it seemed to me to be something wacky with the cluster due to the high beam interaction . But since the oil is leaking I figured I would switch the o ring and clean the wires up back there.
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