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daniel holmes
daniel holmes,
Category: BMW
Satisfied Customers: 9
Experience:  Diagnostic technician at marshalls audi barnstaple
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My rear left light cluster has stopped working and I’m

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Hi, my rear left light cluster has stopped working and I’m looking for some information on what steps to take? Thanks in advance
Assistant: Just to clarify, what are the exact lights you're talking about?
Customer: Rear left tail, brake and indicator
Assistant: What is the model/year of your BMW?
Customer: 420d 63 reg
Assistant: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Just trying to get some info to see if it’s an easy fix, I’ve replaced bulbs and not had any success
Assistant: Anything else you want the mechanic to know before I connect you?
Customer: No
Hi there I am Dan and would like to help with your problem.
Customer: replied 7 months ago.
Hi Dan, what do you think I should do?
Have you checked any relavant fuses that may power that individual cluster? if all ok i would advise to check for a 12 volt feed to one of the none working bulbs.
Customer: replied 7 months ago.
Ok and if this comes back low what does that mean?
I would advise to check the cluster with a good battery voltage, firstly take a refarance battery voltage and compare to what you have at the cluster. If the voltage is significanly lower then i would presume you have a high resistance in the live (possible broken or corroded wire). Make sure you use a good known earth when testing.
Customer: replied 7 months ago.
Aright Dan thanks for your help

If the voltage Comes back ok, i would then advise checking the earth connection on the cluster. Using a multimeter go accross the good live and earth connection and check the voltage, comparing against battery voltage. If the voltage is lower you have a bad earth connection

Customer: replied 7 months ago.
Is it common for one cluster to go if it’s the battery?

It wont be a battery issue, I just reccomend you check the battery voltage before checking any other voltage supplys on the vehicle. I would advise you check the connecting plug that is on the cluster for any water infiltration also.

daniel holmes and other BMW Specialists are ready to help you
Customer: replied 7 months ago.
Alright dan well thanks again I’ll give this a go in the morning if I have anymore questions I’ll be back

Good luck any more questions please do not hesitate to send a question