Speakers are not working喇叭都不工作

①General inspection一般检查
1. Power status "OFF".电源状态“OFF”。 2. Connect the diagnostic tool.连接诊断仪。 3. Power status "ON".电源状态“ON”。 4. Use a diagnostic tool to read the fault code and check whether there is a fault.用诊断仪读取故障码，检查是否存在故障。 Check if there is a fault code?检查是否存在故障码？ Yes → Troubleshoot related faults according to the fault code.是>>根据故障码排除相关故障。 No → Go to step 2.否>>去步骤2。
②Check combination switch and clock spring assembly检查组合开关与时钟弹簧总成
1. Power status "OFF".电源状态“OFF”。 2. Connect the diagnostic tool.连接诊断仪。 3. Power status "ON".电源状态“ON”。 4. Use a diagnostic tool to read the fault code of the combination switch and clock spring assembly to check whether there is a fault.用诊断仪读取组合开关与时钟弹簧总成故障码，检查是否存在故障。 Check if there is a fault code?检查是否存在故障码？ Yes → Troubleshoot the fault of the combined switch and clock spring assembly according to the fault code.是>>根据故障码排除组合开关与时钟弹簧总成故障。 No → Go to step 3.否>>去步骤3。
③Check the wiring harness connector检查线束接插件
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check the speaker wire harness for damage, breakage, etc.检查喇叭线束是否存在损坏、断裂等现象。 3. Check the speaker harness connector for loose connection or damage.检查喇叭线束接插件是否存在虚接、损坏等现象。 Are the test results normal?检查结果是否正常？ Yes → Go to step 4.是>>去步骤4。 No → Repair or replace the faulty wiring harness or connector.否>>维修或更换故障线束或接插件。
④Check fuse检查保险丝
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check whether the fuse EF12 in the electrical box in the front compartment is normal.检查前舱电器盒中保险丝EF12是否正常。 EF12：15A Are the test results normal?检查结果是否正常？ Yes → Go to step 5.是>>去步骤5。 No → Replace the fuse with the same specification.否>>更换相同规格保险丝。
⑤Check relay检查继电器
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Check whether relay ER03 in the front compartment electrical box is normal.检查前舱电器盒中继电器ER03是否正常。 Are the test results normal?检查结果是否正常？ Yes → Go to step 6.是>>去步骤6。 No → Replace the relay with the same specifications.否>>更换相同规格继电器。
⑥Check the left front speaker power harness (take the left front speaker as an example)检查左前喇叭电源线束(以左前喇叭为例)
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the left front speaker harness connector FB19.断开左前喇叭线束接插件FB19。 3. Connect the negative terminal of the 12V battery and the power status is "ON".连接蓄电池负极，电源状态“ON”。 4. Press the horn switch and use a digital multimeter to measure the voltage between pin 1 of FB19 and ground.按下喇叭开关，用数字万用表测量FB19的1号针脚与接地之间的电压。 Standard voltage value: about 14V标准电压值：约14V Are the test results normal?检查结果是否正常？ Yes → Go to step 7.是>>去步骤7。 No → Repair or replace the left front speaker power harness.否>>维修或更换左前喇叭电源线束。
⑦Check the left front speaker grounding harness (take the left front speaker as an example)检查左前喇叭接地线束(以左前喇叭为例)
	1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。 2. Disconnect the left front speaker harness connector FB20.断开左前喇叭线束接插件FB20。 3. Use a digital multimeter to measure the resistance between pin 1 of FB20 and ground.用数字万用表测量FB20的1号针脚与接地之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω Are the test results normal?检查结果是否正常？ Yes → Go to step 8.是>>去步骤8。 No → Repair or replace the left front speaker grounding harness.否>>维修或更换左前喇叭接地线束。
⑧Check the horn switch检查喇叭开关
1. Power status "OFF".电源状态“OFF”。 2. Check whether the horn switch contacts are normal.检查喇叭开关触点是否正常。 Are the test results normal?检查结果是否正常？ Yes → Go to step 9.是>>去步骤9。 No → Replace the horn switch.否>>更换喇叭开关。
⑨Replace the combination switch and clock spring assembly更换组合开关与时钟弹簧总成
1. Replace the combination switch and clock spring assembly and check whether the fault is eliminated.更换组合开关与时钟弹簧总成，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Find the cause from other fault symptoms.否>>从其他故障现象查找原因。   Caution:注意： ♦  After replacing the combination switch and clock spring assembly, you need to use a diagnostic instrument to recalibrate the combination switch and clock spring assembly.更换组合开关与时钟弹簧总成后，需用诊断仪对组合开关与时钟弹簧总成重新标定。