New alternator

[About Time]

Hi,

I am about to connect a new alternator on my volvo penta kad 300. The alternator has 4 connections.... D+, W, B- and B+. Connected will be a sterling power product that protects batteries so they are charged correctly (AGM, LEAD ect.... you choose by micro switches). There are some wires on this sterling product....:

Yellow to D+/L/ 61
White to field on alternator
Brown to D+/62/L/DL
2 x black to alternator neg

Some clever guy to tell me how the wiring goes to the alternator.

Thanks.

 

[volvopaul]

Hi,

I am about to connect a new alternator on my volvo penta kad 300. The alternator has 4 connections.... D+, W, B- and B+. Connected will be a sterling power product that protects batteries so they are charged correctly (AGM, LEAD ect.... you choose by micro switches). There are some wires on this sterling product....:

Yellow to D+/L/ 61
White to field on alternator
Brown to D+/62/L/DL
2 x black to alternator neg

Some clever guy to tell me how the wiring goes to the alternator.

Thanks.

Right I’m not a clever guy , I wouldn’t be doing this for a living if I was .

It depends on what boat you have , single or twin and how it’s already wired .
I know how most makes are wired so tell us .

D+ is battery positive the thick red cable .
B- is negative, ground or chassis as it’s known as .
Brown is warning light
You don’t have w wire as that’s for rev counter on non edc models , your rev counter gets its speed from ecu via crank speed sensor .

So your sterling thing will require the B+ cable and the little yellow cable that goes inside the body of the alternator, that wire is the battery voltage sensing cable, without a plus feed the alternator won’t give charge because it’s voltage sensed.
Ideal situation would be that it’s fed from your domestic batteries but as I’ve said I don’t know the existing set up.
Hope that gets you started .

On a personal note I’ve never been a fan of charging gizmos as there too unreliable , over the years I must have spent hundreds of hours tracing Charing faults where owners have been playing at boat DIY , all because they got collared at a boat show by a hungry salesman.

 

[About Time]

Much appreciated Paul,

It is a twin KAD 300 installation in a Windy 37 from 2003. One engine serves the one starter battery and the other engine serves the two domestic batteries. The alternator (I am changing) with the sterling device is the one serving the domestic batteries. On my dashboard I have two red keys - one for START and another one for SERVICE. Also I have a key saying EMERGENCY which connects all three batteries in case the starter battery is down.

You write "sterling thing will require the B+ cable and the little yellow cable that goes inside the body of the alternator,"

Here is a picture of the old alternator wire fitting:



Please see this photo of the new alternator .. the little yellow wire goes on to the B+ (factory fitted like this)



The sterling device has the following installation guide: