Inspect Illumination Operation

(a) Connect the positive (+) lead from the battery to terminal C10 and negative (-) lead to terminal C19, then check that the indicators illuminate.

If operation is not as specified, check the faulty bulb.

(b) Remove the bulb.

(c) Using the tester as shown in the illustration, test the continuity.

If continuity exists, replace the heater control. If no continuity exists, replace the bulb.

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