I have re-drawn the wiring diagram

skiday · Post by **skiday** » Tue Feb 21, 2012 9:19 pm

When it came to re-connecting the wiring loom I found the wiring diagram printed in both the official manual and the Haynes manual reproduced so small that they were virtually unreadable, so I have spent two days re-drawing it and putting it into colour. I have only done the one which (I hope) is the correct one for my car which is Chassis No. 1E51322. The diagram found on page P.X.s.29 of the manual says it includes 2+2 R.H.D from 1E51197 so that should be mine which is 1E51322BW. You can find my re-worked copy here;

http://dl.dropbox.com/u/62787395/Wiring ... %20Jag.jpg

I hope this will be of use to others, although you need to print it out poster style on 4 pages in order to see the details.

The strange thing is, I have found another wiring diagram from someone in America for the same chassis numbers. It's much clearer than the official one, and states that it's for the same chassis numbers, but it's different in both layout of drawing and layout of wiring. See it here;

http://dl.dropbox.com/u/62787395/E-type ... iagram.jpg

I suppose someone is going to tell me it's already been done and is available, but a Bing search has only fond the one above.

Can anyone explain why if on the diagram which it says is from 1E51197 and that shows a hazard warning light without saying 'When fitted' or 'American market only' why mine does not have it fitted?

Andrew

skiday · Post by **skiday** » Wed Feb 22, 2012 12:06 am

Well I've just found out that wiring diagrams were on this site, so I've just wasted two days! :(

I can't see why they don't come up in a Google or Bing search.

andy303 · Post by **andy303** » Wed Feb 22, 2012 1:31 am

Andrew:
Well I will say that on your diagram the wire colors look more like the actual wiring in the car, when compared to the others. Well done. I downloaded a copy. And if nothing else the exercise has given you a better understanding of your car's wiring. You won't need to refer to the diagram any more - its probably in your head now.

skiday · Post by **skiday** » Wed Feb 22, 2012 12:40 pm

Well at least it's nice to know that my incompetence (of not knowing there was a wiring diagram in the knowledge base [in fact I hadn't even spotted the knowledge base itself ]) is appreciated.

Post by **Heuer** » Wed Feb 22, 2012 1:44 pm

skiday wrote:............. in fact I hadn't even spotted the knowledge base itself.

Not sure what else we can do to make it obvious given it is at the top of the Forum and the title has asterisks each side of it!

PeterCrespin · Post by **PeterCrespin** » Thu Feb 23, 2012 5:55 am

I'm not entirely sure I understand your question but initially the hazard flashers weren't fitted to RHD cars. They came in with the advent of the 2+2 in April 66 as a result of US legislation and were fitted to N American Jags of all types from that date I believe. They may not have discriminated between USA cars and Canadian or other LHD cars - not sure. But if yours is RHD that could be a reason although by 68 I'd have expected them unless it was a 67 build maybe?

For the first versions there was no large warning light between the main clocks, everthing was on a little attached sub panel below the dash so the diagram shows the setup in dotted lines as an optional attachment. I think a lot of these add-ons were removed if any part of the system eventually failed whereas the later version would require a switch to an earlier dashboard to remove all trace. If your S1.5 has rocker switches it definitely should have the hazards I think?

Pete

skiday · Post by **skiday** » Thu Feb 23, 2012 1:17 pm

To clarify Peter, I was just using the Hazard Warning Light System to determine whether I had got the right wiring diagram for my car. Because the diagram in the official manual that appeared to cover my chassis number (reg July '68 - but I don't know the build date) showed a Hazard system without saying 'optional' or 'US Only' and mine has none (although I wish it did) doubt entered my mind as to whether I had got the right diagram or not.

Abarth · Post by **Abarth** » Fri Mar 02, 2012 12:20 pm

Dear Skiday,

Can I just say that I found your color coded wiring diagram immensely useful last weekend when I was re doing part of my loom last weekend!! It adds such a useful idot proof layer to the process of reading these diagrams.

There is one thing that I encountered that I could not locate on your diagram nor on the original ones: in the bonnet section of the loom you have a red and yellow wire leading from the bonnet plug to your 16pin connector strip. Does anyone know what the red and yellow wire is intended for on an original loom?

Another question I have in relation to the 16 pin connector is how should that be wired up - particularly on the earth side. The under bonnet loom section that leads to your right side headlights has 3 (or 4 - memory might be failing me) earth wires that connect into your 16 pin connector on the left side. I noticed that two of these wires are simply a loop (ie a single wire that feeds into the loom and come straight out again on the same side - so does not lead to the other side of the bonnet) - this confused me. Does any on have a diagram specific to the correct wiring of the 16 pin connector??

With many thanks to you all and to the forum for being the most incredible etype resource!!

Arnoud

Post by **Heuer** » Fri Mar 02, 2012 1:30 pm

Arnoud

The red/yellow wire is for fog/spot lamps and should be connected to the position four on the main light switch on later cars.

Abarth · Post by **Abarth** » Fri Mar 02, 2012 6:17 pm

Dear David,

Thank you so much for your response. I hope you don't mind me doing so but can I trouble you for an explanation? Would that (red and yellow wire) have been for optional front fog lights? Or should that that have been a component of the headlights or front running lights?

My car, a S1 4.2 FHC, is giving me a very hard time as the dip beam does not work while the high beams do. I replaced the bonnet wiring loom and am looking for solutions in that area. I fear that I need to diagnose the situation around the dash area - either the dip/high beam switch or the connections/wiring in that area.

I would be most indebted to anyone who has a wiring diagram for the 16 pin connector strip found after the bonnet plug (particularly on route for the earth wires).

With many thanks for your help,

Arnoud

Post by **Heuer** » Fri Mar 02, 2012 6:43 pm

The fog/spot lights were an option although the only ones I have seen fitted are these:

As for a diagram have you checked the Forum Knowledge Base? For example this is there:
http://dl.dropbox.com/u/8496016/lighting.jpg

Abarth · Post by **Abarth** » Fri Mar 02, 2012 8:57 pm

Thank you ever so much again for your help David!!

I have referenced the wiring diagram from the forum's massively helpful knowledge base. The only issue is it does not reference earth wiring nor does it explain why the bonnet loom has a very deceptive pair of earth wires that are in actual fact one wire that disappears into the loom and comes out of the same side of the loom. This was present in both the original loom and the replacement I bought from SNG.

Best regards,

Arnoud

skiday · Post by **skiday** » Thu Mar 08, 2012 3:52 pm

On both the diagram I re-drew and the one on the database for my car I cannot find the sensor as shown in the photo;

I have been told it is the sensor for the tacho, but I can't see it on the diagram. Can anyone point me in the right direction please? I just can't find any loose wires nearby to put onto it. (It's not to do with being an auto is it?)

http://dl.dropbox.com/u/8496016/XKE%20S ... iagram.bmp

Mark Gordon · Post by **Mark Gordon** » Thu Mar 08, 2012 4:05 pm

It's the generator for the tach. It runs off of the rear of the intake cam.

Mark Gordon · Post by **Mark Gordon** » Thu Mar 08, 2012 4:06 pm

You'll find two leads on the back of the tach. One goes to each of the terminals on the generator.

andy303 · Post by **andy303** » Thu Mar 08, 2012 5:24 pm

IIRC, it was used on the 3.8L engine. Shouldn't be there on a 4.2L, so no wonder it won't be on the later wiring diagram.

I wonder if someone swapped heads with a 3.8L?

Mark Gordon · Post by **Mark Gordon** » Thu Mar 08, 2012 5:39 pm

It's the same unit that I have on my 4.2. I think that it was dropped on the Series 2's but more knowledgeable members can correct me.

skiday · Post by **skiday** » Thu Mar 08, 2012 5:43 pm

This just goes to show how unreliable the wiring diagrams are. On the one I colorized and the one referred to from the database, the Tacho is shown to have three wires to it, one green and one white going to either side of fuse 7 and one white going direct to the ignition coil. However I've looked and the tacho has two wires to it, one black & brown and one black & blue. These disappear into the wiring loom and I can't see where they re-appear. Do they come out of the bulkhead ahead of the tacho, or run into the main loom, which appears near the battery.

I think what might be a good idea is a sort of updateable wiring diagram where people can enter corrections from what they have found to be different in the drawings from what they find on the car, as in the case above. (Does anyone have 2 white and 1 green into their tacho, or do more people have b/u & b/n) Other useful additional info would be common location of relays, which is not always obvious, or a drawn layout a bit more like the layout of the car.

skiday · Post by **skiday** » Thu Mar 08, 2012 5:50 pm

I've now looked at the diagram for the S1 3.8 and the S1 4.2 and I see that there is a b/n and b/u direct to what it calls a generator in a closed loop (no power supply & no fuse), so I guess mine must be like that, but I still can't see where the wires emerge from the loom.

Mark Gordon · Post by **Mark Gordon** » Thu Mar 08, 2012 6:05 pm

Mine has a black wire on both leads from the generator to the tach. A couple of years ago, my tach suddenly stopped working (it turned out to be a faulty drive dog which is found between the tach and the cam shaft) and in sorting things out, I ran two new wires between the parts. One day, I will probably be one of those "PO's" who will be cursed for making nonstandard electrical connections as some future owner tries to figure out why the tach suddenly died. But, the tach works great now and I'm happy.

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