Jump to content
Click here if you are having website access problems ×

WOSP alternator wiring


Julian H

Recommended Posts

I would like to change my alternator to a WOSP LMA226, the model specifically for the K series engine. However, it has a different plug to that on my loom. Two problems..

1] my loom has two low current cable connections in addtion to the main cable, the WOSP only has one. What wiring do I need to do to make it work?

2] where can I get a plug that fits in the WOSPs socket?

xlarge_plug.png.64dec7391acf2fa7e6b70c23dea9ef85.png

my Seven's plug

xlarge_wosp.png.4d7a00998b08a6741ec3df85d1726ead.png

the WOSP's socket

Thanks

Link to comment
Share on other sites

I've just used the pikey method of ramming (insulated) spade connectors on the terminals. Possibly marginally lighter than a plastic plug and you can trim a bit of a wiring down.

I have no idea how your BMW alternator wiring works. The WOSP/Denso/Brise wiring has one small cable for the dashboard warning lamp, another small cable for a switched live to "switch on" the field and a fat cable (mine has two) for the positive post that goes to the starter/battery/FIA switch.

Link to comment
Share on other sites

That aleternator looks like it might be a direct replacement for the Marelli A115-65 used on the EU2 engines. The plug you have suggests yours is EU3 in which case you will have compatibility problems as the EU3 alternator has a DFM (Digital Field Monitor) connection to the ECU to allow it to compensate idle speed for electrical load. I'm not sure it will be as simple as just changing the connector.
Link to comment
Share on other sites

Hi Mankee, thanks for the info. Andrew, I would phone WOSP but they are quite clear that punters should contact distributors, not themselves. I have had a look at your rather excellent schematics too [thankyou for making them avaiable] but still unsure what to do. I am only changing my alternator to upgrade it [its lighter], not to replace a standard item. 

Link to comment
Share on other sites

  • 3 weeks later...

All being well, and its not too cold [you should all know by now I am a wuss] I will be fitting my new WOSP alternator. A couple of questions before I start if I may..

what torque do I need to tighten the primaries back up to the head on reassembly?

and

do i need to put anything on the exhaust gasket [hoping it comes off in one piece!]?

Thanks, Julian

Link to comment
Share on other sites

I want to say 41-48 nm for the exhaust manifold nuts, but I've never bothered and just hulked them down. Some exhaust systems are easier to get torque wrenches and tools around of course.

The exhaust gasket should be a multi-layer steel job. I've reused mine loads of times with no issues, but I await being shot down in flames and will say fit a new one as they are cheap. No goo required, just clean up the head and primaries faces.

Link to comment
Share on other sites

  • 2 months later...

Hiya Frank

I cant help yet but have an Emerald to install very soonish. Maybe have a look at the software see if there is anything on it about the alternator? It will be a while before I get round to playing with the WOSP again I am afraid.

My 2006 EU3 on Rover ECU would not allow charging with the new alternator. I am not sure how it works but I suspect the ECU needs a DFM signal from the alternator to allow it to send a charge out? Grasping at straws here but whatever, correctly wired, I was not getting any output from it whatsoever, and the charge light just stayed on confirming the situation. 

Link to comment
Share on other sites

The Emerald isn't fussed about alternator output, save for giving a reading on the live data screen. Mine's an EU3-ish engine with Emerald running an EU2-ish loom and rat's nest wiring. Looks rubbish, works perfectly!

What's your current alternator wiring like, Frank? I don't know how the EU3 charging system works, but I can only assume that, for a Denso-style alternator, you do the usual two smaller cables for the warning light and large cable for charging.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...