Need to know which pins on lighting computer are for brake lights

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

see it my lighting relay,or computer that controls brake lights to.I had to remove it to put K38 relay in.And bothering it caused loose pin.Dealer car repair but $300.I want to add solder to correct pin to make it fit tighter.$300 I don't have to spare right now with $400 electric bills

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1999 w140, quit voting to old, and to old to fight, a god damned veteran