I replaced my ignition switch over the weekend and it fixed the problem I
was having with the coolant warning light sometimes not going out after
starting the engine. Apparently there was enough of a voltage drop in the
+12V coming out of the switch (the two black wires) that the coolant warning
circuit was malfunctioning.

The moral of this posting is a worn out ignition switch can cause problems
other than starting problems. Replacing the ignition switch is a cheap
(about $8.50 from Camelback) and relatively easy (about an hour or so) fix.

Mark McCulley