Points to remember whendiagnosing faults
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Points to remember when
diagnosing faults
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1.
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It may sometimes be worthwhile
unplugging connectors to check that the connections and pins are undamaged and firmly in
place. Plug in the connectors again. If possible, start the car or drive it to check whether the
trouble persists.
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2.
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Since all signals round the 12 V level are proportional to battery voltage, the
signal levels should be used as guidance only.
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3.
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The 0 V signals indicate ground but on a sensitive multimeter could give an
indication of a measurable voltage.
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4.
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Never switch from one unit of measurement to another (e.g. from V, via I to
ohms) on the meter without first disconnecting the instrument's test leads.
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