9-3 Viggen Coupe (9400) L4-2.3L Turbo (B235) HO (1999)
Use an ohmmeter or diagnostics tool set for checking resistance.
1
Adjust the ohmmeter until a reading of 0 ohms is obtained when the leads are held in contact with each other.
2
Disconnect the power supply.
3
Connect the leads to each end of the wiring harness or component that is to be checked.
4
If the ohmmeter shows a resistance <1 ohm, there is no open circuit.