PAE .... Sleipnir???

The ignition light has always worked fine up till now... still leaves us with the alternator or the 'relay for ignition warning light'!

Rich
 
"1" is the 3AW which is screwed to the sloped portion of the base unit inside the driver's glovebox. It looks like a giant flasher unit.
"4" is the 6RA.
I'll get the torch out when i've read pheebs her bedtime story and see if it looks wired in to start with!

Thanks

Rich
 
I cant spot the 3aw. From your suggestion i should be able to pull down the drivers glovebox and see it there but no sign...

Anybody have any pictures of where it lives in case i'm being a numpty ( highly likely...)

THanks,

Rich
 
i've just ruled out engine earth as an issue. Couldnt find my voltmeter in the dark though to check battery and alternator voltages so that will have to wait till daylight...

RIch
 
rockdemon said:
I cant spot the 3aw. From your suggestion i should be able to pull down the drivers glovebox and see it there but no sign...

Anybody have any pictures of where it lives

Here you go Rich, on the inner slope of the driver's side A post inside the glove box, exactly where harvey says it should be.

Ignore the thing in the background. That's a solid state 3AW that I fitted but left the original in place.

CIMG2849-1.jpg


Dave
 
Thanks dave that's really useful.

On mine i think that's where the indicator flasher is ( swapped for a modern relay and ticks when you use the indicators...) ... I'll check again this evening but it's looking like mine has had a job done on it at some point!

I'm going to have to work out what should be where and fit it from scratch i think. I have an 11ac on the way now many thanks to Jim...

If anybody can provide the loom to the alternator i'll happily pay.....

Guessing the car hasnt been charging since i did the heads and the ignition light was only there in my head which is a special place at the best of times... Could do with at least one ok working car. becoming painful now....

Rich.
 
in fact just had a flashback... (quite literally). When i first started taking the rocker covers off etc i hadnt disconnected the battery and there was a flash from the blue (apparently live wire) to the rocker cover. So that does sound like i've fried the alternator doesnt it! I'll go get my dunces hat.
 
That could well be it! Looking at the photo of your alternator again, that short piece of blue wire is plugged into a female conector which could be the warning light wire. With the correct 11AC alternator that should plug directly into the back if it.

Here's a picture of mine if it helps - it's the brown/yellow wire.

DSCN6159_zps99e30ed8.jpg
 
Hi Rich

Sleipnir really has got it in for you at the moment hasn't he!

I think you're right that you have a non original alternator and a messed around charging circuit.

Later series 1's do without the 6RA in favour of a different wiring set up that uses the ignition switch to kill the field to the alternator instead. But I'm pretty sure yours is old enough to have it. So you should have 11AC, 6RA,3AW and 4TR.

On the assumption that the wiring to this lot is all over the show and / or missing.... Why try and replicate the original set up? The 11AC isn't up to the job when working perfectly...

So, major wiring beckons to get to either a standard 11AC set up or to get to a later 18ACR set up. And even the ACR is a bit marginal. So why not cut losses and fit a generic modern alternator of - say - 100 A capacity? If you look on Ebay under Range Rover alternators, you'll find a huge choice at moderate cost - certainly less than a refurbed 11AC! Then you simply need the later alternator bracket that places the alternator outboard of the rocker cover. A modern alternator has all the electronics etc already on board, so the wiring to the ignition light is simply a single wire direct from the back of the alternator to the ignition lamp in the instrument cluster. That ought to be pretty easy to manage. The rest of the circuit is simply power cable straight to the back of the alternator which you already have. The rest you can simply abandon in situ.

The existing pulley will simply swop across to the new alternator and then the most difficult part of the job will be deciding how long a fan belt you need.

I may even have the relevant bracket in the garage...

Chris
 
You might be right in the end Chris but my OCD methodology of making sure what's there is right to start with is kicking in. I think i need to know that what i'm modifying is what i think it is.

I've got an 11AC and a 3aw on the way so will swap that on and get the circuit correct to start with. Can think of upgrading later....

I need to get methodical with it all i think. Still got the problem where if i put the interior light in anything that turns on the interior light will sound the horn and none of the brake electrics are linked up. So far i've got by leaving well alone but it's looking like that's not an option any more.... ;)

Rich
 
thanks paul that picture could well come in very useful... I dont suppose you could take a quick photo of which wire goes to which wire at the plug at the inner wing ( assuming s2s and s1s are the same in this respect? )

Thanks,

Rich.
 
Sorry Rich, EMF is hibernating at my mother in laws at the moment so I can't take an photo's of it. That other one was from the archive
 
chrisyork said:
The 11AC isn't up to the job when working perfectly...

That's a very sweeping criticism of the 11AC alternator Chris. I've never had any problems with my 3500S during the winter months with everything on. The 11AC has always been man enough to keep the battery well topped up :wink:

Dave
 
Some more pictures if they're any help Rich. My 3500S doesn't have a 6RA relay but has the switch incorporated into the ignition switch as Chris has mentioned.

CIMG2840-1.jpg


Back of alternator

CIMG2841-1.jpg


4TR control unit mounted inside passenger glovebox.

Dave
 
OK, hadn't realised the electrical problems went wider than just the charging circuit!

Dave, you have the luxury of reasonably long journeys for your cars. Mine - and I think Rich's - get to do a significant part of their lives in short runs in traffic. The 11AC copes far less well under those circumstances. And it always has - my Father's new '73 3500S did around a mile each way to work and that didn't like it when brand new!

Chris
 
chrisyork said:
Dave, you have the luxury of reasonably long journeys for your cars. Mine - and I think Rich's - get to do a significant part of their lives in short runs in traffic. The 11AC copes far less well under those circumstances. And it always has - my Father's new '73 3500S did around a mile each way to work and that didn't like it when brand new!

Fair comment Chris. The solution then is to drive your car longer distances...... :D :wink:

Dave
 
Rich,
I intend putting a later alternator on my V8 so if you can get your current set-up running for now I'll have a better solution for the future.
your'e not too far away for me to visit if you want me to.
I can see Chris Yorks point, 11Amp alternator max. output, but 100Amp is way over the top. Remember these are '70s cars with little electric loading, I haven't done any load calcs. but 28Amp would probably be enough.
The most common with the right frame size is 45Amp, and that is what I will be using.

We currently fit 80Amp alternators to machines that need 5A to 19A just to run the diesel engine, and then have a/c, heater blower and six 55 watt work lights as well as the normal lights plus ecu's solenoids etc, etc.

btw, started working on UCA again, SD1 heads. 3.9 cam. SD1 timing cover fitted. Next job rebuild the ZF 22. All due to the advice from forum members. Many thanks.

Jim.
 
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