Help Needed with Alternator Wiring

[cimo]

I only skimped through the previous posts, but you appear to have it -

{OLD Alt.} {CABLE} {NEW Alt.}
{+} {Heavy Red} {+}
{61} {Green} {L (@ 8 oclock) or spade terminal (on the left looking at the rear I beleive? - you found it already).}
{-} {Black & Red/Black} {not applicable as this is a common ground alternator}.
{W} {unknown} {you didn't have a tacho connection on the old ALT, but if you did, it would go to W on the new one too}.

Chase the negative cables (black& the short red/black).
If they don't go to anything important, then you can remove them altogether.
Alternatively connect them to the Alternator chasis or engine block.

Take voltage reading as before.
Ensure +12V is registering between the Alternator + terminal and engine block before starting the engine.

Fire up & check for warning lamp going off (may need to up the revs a bit).
Verify that battery voltage/alternaor o/p rises.


(sorry - the formatting I typed in didn't save as intended!)

 

[VicS]

W on the new one is top left. There's a bloody great W cutout in the casing!

.

Thanks Guys.

Is 'w' on the new alternator, the tacho connection? where should the ground (-) connect to?

That is not a "bloody great W" cutout in the casing.

Look at it the right way up ........... it's an M ...


For Christ's sake get the connections properly identified .

If you are not careful you will wreck the thing experimenting.

 

[Sammy Lou]

Thanks to al for taking the time to reply.

I have a couple of different things to try today before I give up on it.

The problem is that the previous owner did a lot of work to the electrics (new battery switch, vcr, sterling charger, fuse panels) but I'm not sure that it was tested for anything other than shore power configuration as the boat was sat in a marina a long time before being sold.

I'm sure my next question will be 'does anyone know a good marine electrician in the Portsmouth area?' but I wont give up just yet.

Thanks again.

 

[ianj99]

Thanks to al for taking the time to reply.

I have a couple of different things to try today before I give up on it.

The problem is that the previous owner did a lot of work to the electrics (new battery switch, vcr, sterling charger, fuse panels) but I'm not sure that it was tested for anything other than shore power configuration as the boat was sat in a marina a long time before being sold.

I'm sure my next question will be 'does anyone know a good marine electrician in the Portsmouth area?' but I wont give up just yet.

Thanks again.

Here is a link to the same type of regulator (yours is on the application list) which does actually show the function of the 2 terminals on the regulator and as predicted (so not a 'randon guess' after all) one (L) is the warning light and the other (+) requires a feed from the ignition switch.

http://www.ebay.co.uk/itm/VERG1006-...T-130657-/300957655981?_trksid=p2054897.l4275

So you need to run a new wire from the ignition switch to the + terminal and the green wire to 'L'.

Ian