Hi from Berkshire.....

[scruffy88]

Happy Easter everyone,

I've had an early Series 3 FFR (27GJ48) for a long time, it's just come out of hibernation and is being recommissioned after a long time sitting in the shed.

I've had some electrical issues, which have been solved by replacing the IR and AUX relays. Inside the dash, I found an extra relay, which I believe is an in-service modification to avoid the overheating issues with the IR switch.

Does anyone know how it should be wired? I realise most owners disconnect the IR facility, but as it's fitted, I'd like to have it work as it should.

Cheers everybody...

[AR4412]

Welcome to the forum.

I haven't come across a vehicle where the modification has been carried out, so unable to offer any information on it for you. Modifications fell into two catagories, Immediate, and Routine. If it was classed as a 'Routine' modification it would only have been carried out if, or when, neccessary. Maybe someone out there in Lightweight land has a vehicle where it has been carried out and can offer help.

The modification was covered in, I believe, EMER Q 027/13, as Modification Number 13, dated March 1982. Fitting headlamp Relay To Infra Red Circuit. I have had an online search for this in the past, but have been unsuccessful in tracking down an available copy of the relevant EMER to see how it was carried out. I wonder if someone has one tucked away in their archive somewhere?

As you said, I think most people keep their fingers crossed that everything works as it should, and when it doesn't they just bypass the switch.

Regards,

[fv1620]

There is mention of the EMER (which is EMER WHEELED VEHICLES) cropped on here a couple of years ago.

viewtopic.php?p=88943&hilit=Q+027%2F13#p88943

I'll dig out the original if you want it.

[fv1620]

Can't find it for the moment but see I have also got the mod in both AESP and FAESP, so hope to turn up something.

[AR4412]

Hiya Clive! ,

You were the archive I was thinking of.

Regards,

[scruffy88]

Afternoon Gents,

Many thanks for the information. It's mounted behind the IR switch panel, inside the dash (effectively behind the flasher relay). March 1982 timeframe for the modification fits with the date code on the relay (43 81).

It's a LUCAS 6RA (33327B) 24v changeover relay with PRC3467 harness attached. It looks like it has been contrived to change the supply to the headlights (blue) from a permanent live (brown) or the switched output from the 6 way switch (blue/black), thus removing the higher current from the IR switch. The IR switch only has to take care of the current to operate the IR and changeover relays now, reducing the risk of it bursting into flames! I think I've worked out how it's supposed to be wired, but am reticent to try it without some independent verification.
I've attempted to attach a picture, apologies for the quality of the image.

[fv1620]

Here is the diagram from the AESP which is the same as in the EMER. Note the colour code differences that I mentioned in the other thread, but they seem to tie in with colours of your wires.

IMG_20230408_151523 (Large).jpg (183.07 KiB) Viewed 8781 times

[AR4412]

Thanks for sharing the pics.

A good few years ago I spent a while looking online for that info for a while Clive, knew I should have asked you if you had a copy of it.

Has the relay been mounted on the side panel inside the binnacle?

Regards,

[fv1620]

Neil yes the chance of finding bits of an EMER on-line are slim.

The diagram I posted comes from AESP 2320-D-100-811 Mod Instr No 22 Note that this is for all Series 3 and although the diagram I used mentions 1-Tonne that is because it was reproduced from the EMER that was common to WV Q 027/13, Q 027/14 and Q 057.

[scruffy88]

FV1620, AR4412,

Many thanks for the diagram and the info. I have wired to the schematic and all works as it should.....now on to the other issues....

Cheers