Is this the "W" terminal on a 300TDi Altermator??

Hi all,

was looking at fitting one of these rev counters to my Defender ( BLACK FACE REV COUNTER TACHO RPM GAUGE - DIESEL TDI TD | eBay )

from looking at forums and web pages i see that it is the "W" terminal on the alternator that the signal wire is fitted to but i was just looking for someone to confirm which one is which before i start ripping wires out...

Here is a picture of my alternator and the wire i think leads to the "W" terminal

Cheers Robert

P.S. Anyone know what this terminal does?

"w" is the one , did work at an auto electrical place a few years ago .

no thats power out
what make n model is yo alternator?

The Mad Hat Man said:

no thats power out
what make n model is yo alternator?

Click to expand...

as far as im aware its standard land rover, 1995 300tdi defender

no such thing as standard landrover...
if it has a extrenal cooling fan on the front it'll be a Lucas A127 65amp or if the fan is internal it'll most likely be a Marrelli 100amp,

w is tacho, big stud D+ is output and goes to battery, small stud goes to warning/charge light.

this mite help? A127

The Mad Hat Man said:

no such thing as standard landrover

w is tacho, big stud D+ is output and goes to battery, small stud goes to warning/charge light

Click to expand...

Cheers, think i know what i need to do now, thanks mate, you wouldnt by any chance know what would happen if i removed the tacho wire and ran the engine?

b+ goes to battery d+ warning light w as said rev counter

Had a quick search on fleabay and it looks like the same alternator as the one on my 110
LAND ROVER DISCOVERY 2.5 300TDi 94-98 ALTERNATOR AL152 | eBay

Def110TDi said:

Cheers, think i know what i need to do now, thanks mate, you wouldnt by any chance know what would happen if i removed the tacho wire and ran the engine?

Click to expand...

yu wouldnt have a working tacho :doh:

The Mad Hat Man said:

yu wouldnt have a working tacho :doh:

Click to expand...

i know how stupid this sounds but what is a "tacho"....apart from mexican food?

let me :googleit: for you?

The Mad Hat Man said:

let me :googleit: for you?

Click to expand...

ive googled Lucas A127 W terminal but cant find an explanation

did yu press the :googleit: button?

The Mad Hat Man said:

did yu press the :googleit: button?

Click to expand...

lol, ill need to try that

From memory when i did mine I think "W" is stamped on the terminal, it small and you just gotta look harder.

mark g said:

From memory when i did mine I think "W" is stamped on the terminal, it small and you just gotta look harder.

Click to expand...

At the point "13-94" on the picture to the right, can i just attach a wire to that stud to take a signal from it?

Alternator stripdown and repair

Def110TDi said:

At the point "13-94" on the picture to the right, can i just attach a wire to that stud to take a signal from it?

Alternator stripdown and repair

Click to expand...

does it have "Used for the Tachometer"? written on the pic?

does this work the same say for the 2.5 petrol 4 cylinder?

If yours is petrol then check this out.....[ame=http://www.youtube.com/watch?v=C7uCSclfQEU]Fitting a Rev Counter to a Defender V8 - YouTube[/ame]