Mike, you stated...
<< As I understand, the warning light on the water temp gauge actually
signals
low fluid level in the coolant reservoir tank...>>

     It signals low fluid level *or* overheating. (both, if you
experience a blown hose and aren't paying attention)  And, since the
alternator belt drives the water pump, if the alternator light should
comes on, it would be prudent to stop immediately and check for a broken
belt.

     George/ATL
     '89 Westy, Wernher
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