There are two electrolytic capacitors internal to the clock that have failed. They must be replaced. If you know how to use a soldering iron, it is very simple. Remove the clock. That means that it must be unpluged from the back of the instrument cluster. This is also easy to do. If you have a 1983 240T like me, then, remove the plastic covers to the clock and gauges and remove the light and dimmer switch knobs. Once the light and dimmer switch knobs are removed, use a philips screwdriver and remove all the screws on both sides of the instrument cluster. Set your steering wheel to be level and straight. The cluster will slide right out. Take it as far out as you can so you can see the back of it. You might need a light.

unplug the electrical connector for the clock. Then simply pull the clock out. Installation is the reverse of this.

There is a black soft metal rim on the clock and a small bead of solder on the back of the clock. remove the small bead of solder. remove the screws on the back of the clock carefully, peel back the soft black metal. The clock should disengage. You will see two tan cans on the back of the circuit board. these are the capacitors. Check to see where the polarity band on the capacitors are located with respect to its position on the circuit board before you remove them.

You can use any 100 microfarad or 200 microfarad 16 vdc capacitors. Install the new capacitors in the same location as the ones you removed.

reassemble the clock and reinstall.

Mine works perfectly now.

I replaced my clock twice (wrecking yard) before I searched the archives here and found the answer.

It cost me less that $5.00 to fix and took less than an hour.

If I missed anything, and I don't think I did, search the archives here for additional instructions.

Have fun.

Lawren