Quote:
Originally Posted by @jrfordlandia
It is grease but none of the other large connectors on that same pillar have that look. They all look clean and clear. The brown smears off and doesn’t appear to be melted. I can’t tell if the pins have corrosion based on the angle of their location. I’ll try to get more pics. Maybe I should put an ohm meter on it to look for a connection.
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It's most likely dialectic grease which is a non-conductive grease used to keep moisture and corrosion from getting into or forming in a connection, being a non-conductive material many say it can prohibit a good connection if applied to the actual contacts and should only be used for sealing a connection after it's been connected, I somewhat disagree with that because as long as the metal contacts/connectors are tight fitting the connection is there and the grease doesn't interfere with the connection because because the tight metal to metal contact is a good connection and any of the dialectic grease is squeezed out of the metal to metal contact.
It wouldn't be a bad idea to clean some of the grease from the connection if it is some other type of grease or Vaseline which are conductive and could cause a short between connectors, but if it is indeed dialectic grease I doubt it will make any difference.
Which connection exactly is this connector for?
Do you know the entire history of the vehicle?
If not it could of at one time been in a flood or submerged in water to some degree and whoever salvaged it used the grease to repel moisture.