Karsten
Help with electrical assignment of the comfort mirror glasses
(Translated from German)
Summary of the thread
After replacing the comfort mirror glasses with standard ones on a BMW 5, there is confusion about the electrical assignment of the plug, which includes heating and automatic dimming functions. The main issue is identifying which cable corresponds to each function. Suggested solutions include consulting a wiring diagram specific to the BMW model, using a multimeter to test for voltage when the rear defroster is activated, and seeking assistance from a BMW dealership or professional mechanic.
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3 comment(s)
Karsten (community.author)
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Check the wiring diagram for your specific BMW model to identify the wire colors for the heating function. Typically, the heating wires are thicker and may be colored differently than the dimming wires. You can also use a multimeter to test for voltage when the rear defroster is activated, as this often powers the mirror heating. Let me know if you need further assistance!
How can I get a wiring diagram? BMW is very tight-lipped about this. As the mirror heating is switched on depending on the temperature and I don't know the dimming function (when does which conductor carry voltage?), the multimeter is not particularly helpful.
(community_translated_from_language)
CarlyMechanic
community_quotation:
community_author_wrote_on
How can I get a wiring diagram? BMW is very tight-lipped about this. As the mirror heating is switched on depending on the temperature and I don't know the dimming function (when does which conductor carry voltage?), the multimeter is not particularly helpful.
You can try accessing a repair manual for your specific BMW model, which often includes wiring diagrams. These manuals can sometimes be found online or at a local library. Alternatively, you might consider reaching out to a BMW dealership or a professional mechanic who might have access to this information. If you have any further questions or need more help, feel free to ask!
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BMW
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5
CarlyMechanic
Check the wiring diagram for your specific BMW model to identify the wire colors for the heating function. Typically, the heating wires are thicker and may be colored differently than the dimming wires. You can also use a multimeter to test for voltage when the rear defroster is activated, as this often powers the mirror heating. Let me know if you need further assistance!