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Thread: Tailight Fix
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Old 03-08-2010, 09:21 PM   #149
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Join Date: Jan 2009
Location: Charlottesville VA
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My Ride: '04 325xi
Originally Posted by vintagegz View Post
When using the spade connector on one end at the tail lamp assembly, would it not be better to run a separate ground wire from there right to a body ground, but where would that body ground be, that way you have a backup for the brown wire and it does not carry all the electrical load. Any ideas?
As I understand it the wire itself is sufficient to handle the load. The weak link in the OEM configuration is the small connector within the plug. There is too little surface area on the small connector to properly transfer the load. When this is combined with time and oxidation causes resistance and heat eventually melting and destroying the connection.

By tapping / splitting the wire and grounding it to 2 separate points it provides sufficient distribution of the load.
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