Warning light assimilator - again sorry !

The earth lead has dropped off my warning light assimilator (WLA) due to old age, only been there 34 years !

So I bought a relacement. The old one is a nice shade of metallic blue, but the new one is black, which is a shame, but looks more robust.

The old blue WLA has a U-shaped double terminal that connects, according to the wiring diagram, with a green/yellow wire to the alternator
and a white/brown wire to the warning light in the headlamp. So the GY and WB wires are joined by the U-shaped terminal.

However, the new black WLA has three terminals marked E (earth), WL for warning light (?) and AL for alternator (?). Is this correct ?

Presumably the WL and AL terminals are now joined inside the WLA setting compound ? Rather than externally?

Staytite said:

The old blue WLA has a U-shaped double terminal that connects, according to the wiring diagram, with a green/yellow wire to the alternator
and a white/brown wire to the warning light in the headlamp. So the GY and WB wires are joined by the U-shaped terminal.

Click to expand...

A blue can with a double terminal is the 2MC capacitor and not the WLA which should have three separate terminals marked as you have described.

What you describe first is not correct wiring. The 3 terminals are separate - AC from the alternator (green/yellow), an output wire to drive the indicator lamp (white/brown) and a ground (red).

edit: LAB is right, the blue can is not a WLA. The old WLA was a silver can mounted with a spring up by the coils, and had 3 terminals.

I have just removed mine and fitted an electronic replacement from ICM for only a few quid.

Thank you gentlemen for being polite. Looks like the electrical connections to my brain have also corroded over 34 years

Just looked inside my headlamp shell and there nestling in the wires is an RGM solid state battery condition cube thingy.

Obviously decided 34 years ago the that the original silver (!) WLA was a bit useless.

I was wondering where the smug/smirk/snigger emoji was, then realised I’ve been there, done that, so thought better of it.

Landspeedracer said:

I was wondering where the smug/smirk/snigger emoji was, then realised I’ve been there, done that, so thought better of it.

Click to expand...

It's even worse when you've owned your bike since new as I have and the only person to ever touch the wiring has been me. And looking at unused wires under the tank and saying, "Why did I do that?".

maylar said:

It's even worse when you've owned your bike since new as I have and the only person to ever touch the wiring has been me. And looking at unused wires under the tank and saying, "Why did I do that?".

Click to expand...

Not to worry all Commandos have some un-used wires coming from new. Then you lose more when adding electronic ignition.

Landspeedracer said:

I have just removed mine and fitted an electronic replacement from ICM for only a few quid.

ICMotorcycles.com &nbsp Ignition / Alternator / Battery Warning lights, Charge Monitors

Ignition Alternator Battery Warning lights Charge monitors. Combined charge and oil pressure warning lights

www.improvingclassicmotorcycles.com

Click to expand...

I’ve got one of those too. And it works as an oil pressure light.

Funny how every time somebody asks how to wire a warning light assimilator, somebody else chimes in and says they use something else.

Stephen Hill said:

Funny how every time somebody asks how to wire a warning light assimilator, somebody else chimes in and says they use something else.

Click to expand...

Well, shouldn't they know about other options?