Instrument lighting (MIU 1)
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Instrument lighting (MIU 1)
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The instrument background lighting is inoperative when the rheostat is activated
but the other instrument lighting is OK.
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1.
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Unplug the main instrument
display panel's 3 connectors and connect the Scan Tool's test leads to pin 10
(12p-1) and ground. Then select "TEST" followed by "PULSE". If in proper working order, the
reading obtained should be between 53 and 93 Hz. The ignition should be switched on.
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2.
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If the reading obtained is not OK, check the wiring for continuity/shorting by
measuring the resistance across pin 10 (12p-1) of the main instrument display panel and pin 2
of the rheostat. The resistance reading obtained should be < 1 ohm.
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