Peugeot Repair Questions? Ask a Mechanic for Answers ASAP
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This issue here can be due to a short in wiring leading to the lights. If you have not traced the wiring from the light assemblies this should be done to see if any wiring is found to be at fault. If a wiring issue is found it will need to be repaired.
If no wiring is found to be at fault then you need to have the control circuits tested. This can be a lamp control unit or body control ECU shorting out internally. I would start with having the fault codes read out of all computers in your vehicle using a fully compatible scan tool/computer plugged into your vehicle that can read all computers to see what codes are set. This will help to locate and repair this fault here.
I do suspect a control unit/ecu like a lamp control unit or body ecu at fault or shorted wiring.
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