Hi Everyone,
I added a large Tach to my 1989 240 DL along with an oil pressure and volt meter about 2 years ago. Everything worked fine until about 6 months ago. The tach has started to malfunction. Some days it works fine. Some days it doesn't move at all when I start the car. Most days it works for a bit, then drops to 1k, doesn't move for a bit, then slowly drops to 0. The tach won't move again until I restart the car, and sometimes it still doesn't move. Car runs fine.
Is there a way to test the tach? I'm going to have my dash apart to fix the odometer gear and upgrade my stereo. I'd like to test or replace the tach while the dash is apart.
Another quick question. Sometimes the Overdrive arrow glows dimly then goes out. Car is an automatic, and shifts fine. Glow started happening when it was cold, but is still happening now that its hotter. The intensity of the glow is different each time it happens. This doesn't seem to be connected to the tach problem, but I thought I'd mention it.
Thanks!
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