Hi, everyone; 1986 420 SEL: the power wire in the fusebox which supplies the ACC blower got hot, was touching the cable from the temp sensor tot eh display; melted through the insulation and gave it 12-14 volts. Smoke came out of the instrument panel!
I repaired the blower wiring by installing a separate, 25A fuse; however, now I am repairing the temp display. I got a used one; I need to repair the harness; it is burned in the fusebox, about the last 6 inches before the connector. Will it work OK if I splice in some new wire and solder the joints, then cover with heat-shrink tubing?
By the way: my car had never had the factory-recommended upgrade to the blower wiring: the problem is, because of the high current the blower uses on "High", and the amount of time the blower spends on "High" in warmer climates, it can overheat the terminal ont he bottom-side of the fuse block, causing the terminal to loosen and be pushed down by the spring tension holding the fuse. Better check to see if your car has had this; there's a lot of wiring in the bottom of the fuse box.