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Hi everyone I have what we call a holden astra over her (NZ) the headlights, taillights and dash loights wont work but high beam and brake lights do, any ideas please and thank you

start by checking fuses and relays as Im not sure what year were dealing with I’m going to assume its reasonable new and has a ECM . Check the connection at the ECM for corrosion and clean If theres still no Joy break out the test light and multi meter and start looking for a short. Hope this helps