Ford Workshop Manuals
Ranger 2WD V6-177 2.9L (1989)
Instrument Panel, Gauges and Warning Indicators > Volt Meter Gauge > Component Information > Description and Operation > Page 5707
Volt Meter Gauge: Testing and Inspection
CONSTANT VOLTAGE REGULATOR GAUGE SYSTEM (CVR)
Disconnect battery ground cable and remove gauge from vehicle.
Connect ohmmeter between gauge terminals and read coil winding resistance.
An upward movement of ohmmeter needle from 10 ohms to 14 ohms is normal, as test current of ohmmeter causes a temperature rise in gauge coil
If ohmmeter reads below 10 ohms or above 14 ohms, gauge is defective.
MAGNETIC GAUGE SYSTEM
Ensure voltage is present at fuse panel and cluster.
Install gauge tester tool No. 021-00055 or equivalent, following manufacturer's instructions. This tester can be used on the CVR or Magnetic
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