This is embarrassing , 25 yrs. ago when we first got our little Westsail it needed a bunch of stuff done . I hired what I thought was a competent shop , turned out not so much . I got sold some things that I didn't really need or they never worked right . Over the yrs. I have gotten rid of some things in the engine room , some of it 70's vintage . I decided to up grade my battery charger to "Maine's" Sterling Pro Charger 40 amp , the installation I'm going to hire out to a ABYC electrician . OK the embarrassing part , 25 yrs. ago I vaguely remember the shop telling me I needed the part pictured . The wires coming off it go to my 1- 2 all switch and one wire goes to my amp meter . A friend of mine told me my new charger will replace this part and I should get rid of it . So what is the part ? Do I need it ? Thank you for any reply .
DSCF2592 by mark westi, on Flickr
DSCF2592 by mark westi, on Flickr