9-3 Coupe (9400) L4-2.0L Turbo (B204) (1999)
This method is used to ascertain whether the voltage drop in a wiring harness or across a component, etc., is too great.
1
Connect the positive lead of the voltmeter to that part of the cable or component closest to the power supply.
2
Connect the negative lead of the voltmeter step by step towards the load (item of electrical equipment), which should be switched on.
3
When the circuit is activated, that is, when current flows through it, the voltmeter will show the difference in voltage between the two measuring
points.
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A circuit in perfect working order should not show a voltage drop of more than approximately 1 V.
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In simple circuits or connectors, the voltage drop should not exceed approximately 0.5 V.
Checking For A Short-Circuit to Ground