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I worked on my son's 1989 240 a couple of weeks ago finding brake light problem due to bulb failure relay (re-soldered and worked). Last night headlights went out and found melted headlight relay connected melted at the + main supply. Thinking this is what caused the bulb failure relay to fail, since before that he smelled burning.
First, thanks to brickboard FAQ; diagnosed bulb failure relay first time and going for the headlight relay this time.
Two questions
Connector obviously heat from short or bad connection. Any ideas where to check for root cause?
What is best fix without removing entire harness (I know that is the best way)? Is splicing a new connect a good idea?
Thanks
Gary
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