My 1998 Seaswirl boat wiring harness has a lot of corrosion in the 12+ pin connector

[Chris1956]

I am having trouble with the subject. The corrosion has restricted the power and likely ground at the connecter to the boat part of the harness. The engine harness seems fine.

Are there any boat wiring harness plugs that are recommended to replace those. Do the pins for the replacement connecters (deutch or amphanol) need to be soldered, crimped or something else.

 

[ESGWheel]

Changing out a multipin connector is doable but also may not be necessary. Let me explain. They make ‘connector cleaners’ that are like a little mini file or brush to clean both the male and female sides of a connector. They come in all different sizes so need to determine what would work best on your connector. Here is an example link. They seem to be more expensive from what I recall but they do work. These coupled with an electrical spray cleaner like this (link) should do the trick to get that connector cleaned up. And you can use these tools on other connections as well.

 

[dingbat]

I am having trouble with the subject. The corrosion has restricted the power and likely ground at the connecter to the boat part of the harness. The engine harness seems fine.

Are there any boat wiring harness plugs that are recommended to replace those. Do the pins for the replacement connecters (deutch or amphanol) need to be soldered, crimped or something else.

The pins are crimped.
Ideally using a ratchet crimper, but I've done many with a hand crimper.

Easy job once you figure out how to release the pins from the socket. They make pin releases but a very small bladed (1/8” wide) screwdriver does the trick.