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Very good Peter - this gave me good tips on diagnosing what appears to be a faulty compressor clutch on my car. Thanks for posting.

Thanks Peter!

Great video !!! Thanks for sharing your heater valve adventure - will be helpful working on my XJ12

thanks a load i was having issues with my windows the other day. luckily it was just bad contacts on the switches but this helps a lot

Never use Jaguar HE V12 engines they have Made in India heads and drop valve seats....earlier pre HE are better

Lmk if it works.... And if yours is not 86 North Am, where you find the relay.

Thanks for this! My XJ-S has this problem. For what they cost, I’m just going straight to putting in a new relay. Fingers crossed!

Peter, the other thermal/circuit breaker is for the power door locks. Go to jagrepair dot com, under the electrical section, go to the XJ6/XJ12 page and download the 1987-1988 electrical guide at the top of the page. It also has the XJS in it. The 1987 section will be very close to your 1986, and the diagrams are broken down by system, much easier to follow than the diagram you have. It also has detailed diagrams of the locations of electrical components. I use those diagrams for my 1985 coupe, and they are almost identical to the car. Sometimes fuses went to locations or became inline, but the part locations and color codes are the same.

Great video! Very helpful in troubleshooting the AC on my 1987 XJS.

Have the 1987 model, I just ran the vacuum direct from under the intake into the dump valve and on to the distributer vacuum advance. This works exceptionally well. Car starts first kick every time and no longer smokes the garage out. Noted with this set up that you can and do occasionally get a very slight pause in engine if the dump valve kicks in, but the rest of the timed start up vacuum spaghetti and solenoids is best just removed if you live in a normal temperature country. I now get better fuel economy and the car doesn't over heat like it did when the vacuum advance didn't work thanks to the spaghetti of valves timers and redundant thingamajigs. Used the same clear blue vacuum pipe you did- its rather nice... Ali express The other thing did was drilled a few holes in air intake at front for better breathing and a mild induction noise that sounds better. Thanks for sharing.

Nice Vid, but 1896 ?🤔

Is this big enough to take a full sized truck

WOW! Now I know why English cars are known for their bad electrical.. that soft plastic "circuit board" is CRAZY!

1896? Didn't know they were making them that long!?

I am breaking a 1989 XJS V12 Jag .. 128,000miles Engine and Gearbox 100% can be heard running .. all parts are available if anybody needs parts - I am based in Ireland

You could have just jumped the relay to see if it worked :-)

Hi, was this just for USA cars would you know? Cheers

Brilliant - thanks so much for posting this; all my bulbs are so low in brightness I can hardly see any of them, even at night..!

Fantastic stuff! I am about to delve into my fuel leak issue on my XJ-S, this is really helpful, thanks.

Just fell across your site Peter, some interesting issues covered in your videos which I have with my own XJS . Very informative, thanks for posting, regards from England.

Absolutely brilliant.

Greetings Peter. Although this video is 5 years old,it is a wealth of information and I am grateful you took the time to post this . You are 5 years my senior . I have a 1988 xjs same situation, just bought the hose but having a difficult time figuring out the tee valve data , I'm probably not using the correct term, if you recall the parts you used for the heater hose to block and the air bleed I would be forever grateful. Thank you and I hope you are well and excellent video. I will watch your others now.

The Bing link isn't working... I'm guessing that's the wiring diagram😔

I have a 1990 Jaguar XJS V12 . What is the parts used to replace the air pump with the new pulley system or where I might order them ? Now I live in Yuma , AZ 3 miles from the California border .

I'm fixing up my 96 xjs but i need bulbs for the dash and warning cluster...anyone know what bulbs I need and where to get them?..also where did you get that print out at?..TIA

What is the name of that part at 5:55?

Where does one buy the aftermarket fill piece that you put in after the air pump was removed???

👍 If I want to just change the warning strip of lights to LED does the cover just pull off or are there screws? it looked like the corner screws had nothing to do with the cover for the bulbs!! Thanks for the video.

Hi great video, thanks. I notive it looks like your coolant temp gauge doesn't work, neither does mine, is this something you've had to fix?

No way thats an 1896!

I can speak from experience that the fuel cell is what it is. The sheet metal is very soft and susceptible to rusting through. The gasoline smell is generally numerous, numerous micro pinholes weeping raw fuel fumes into the boot and at that point should really be replaced with a new one that has been sealed prior to installation. I stripped the primer/paint off of mine and mixed up polyester resin and Aerosil recoating the entire exterior of the cell before refinishing in order to make sure it does not weep fumes into the boot with the battery and external fuel pump and electric antennae etc...... fuel fumes without ventilation is bad news.

lol Mary"s husband is 16 year old?

Thank you for the video - it was very helpful to get the mechanism off the car. I needed access to fix the washer system. Turns out the one-way valve was blocked. Regarding the "park" function: Mine works as follows: When I switch off the wiper at the stalk, the wipers sweep once more to the rest position. Rest position looks very similar to how you set yours when switched off. BTW - Mine is a LHD 1987. It has the same Lucas Wiper system like yours and parks to the left. It doesn't seem to get in the way of vision when parked. Hope this helps! Thanks again! Dave (in San Diego).

Hi Peter. Love the video, very informative. I have a 1984 XJS SC and I have removed the cluster and found a white wire that come up from fuse 4 in the main fuse box which I believe is the main power for cluster. Before the white wire gets to the connector (smaller of the 2 cluster connector's) there appears to be what looks like a bulb holder, which has burnt out badly, the center of whatever it is that goes into it (bulb/fuse?) Seems to be fibrous with a winding of fine wire. Do you have any idea what that be so I can buy a new one. I have looked on service manual and spoke to David Manners rep but no joy on what it can be. Any ideas? Cheers

What exactly was wrong with your blower to necessitate removal, you just seem to put it straight back in again! I would have liked to see the insides. I have a DB7 V12 with a passenger side noise (a random speed related click, like some foreugn object is catching the blades, or the fan as a whole is loose on the pintle). I have been told the blower is XJS, and the verbal descriptions I have read about removal match with your excellent video. This looks absolutely back btreaking leaning in through the door, how you do not have to add sweary bloops is beyond me. I have a horrible feeling removing the seat would help, which is really annoying as I've just put them back in after renewing the carpet and Aston have made the seat bolts ridiculously tricky to get aligned.

Can't begin to tell you how helpful this is, but on my 94' XJS. In the middle of the job now and I am hoping I don't have to remove the steering column as they recommend. I will try your method first!

Thanks for this. Came in handy today when I r&r'd my blower. My fan was hitting the body of the blower, and driving me crazy. Did it in about 3 hours. The left hand blower mounting bolt was a challenge to get to to reinstall, but definitely doable.

Can you tell us where you found the wiring diagram?

I am just removing all the airpump stuff from my US XJ-S and was looking for the idler/pulley setup to replace the airpump. Okay, simplyperformance, many thanks for the information. Will also remove the railtubes, bought european intake manifolds w/o the holes for the downpipes. My XJ-S is same year and same colour as yours, by the way. Greetings from Germany, Christian

A really helpful and insightful video. I have used this to take my dash out and change all my lights to LED. The covers over the 5 bulbs for the speedo and rev counter were that discoloured I unscrewed them and took them off. It transforms the dash, I went for amber orange glow bulbs. Am now trying to solve the fibre optic lighting, the two interior light switches, I have a feeling the fibre optic might have been cut thinking its a radio cable. Again, thank you.

Thanks, does the fuel filler nozzle pull straight out. I am having trouble getting my on out. Removed both clamps. The hose is loose enough to spin but still having trouble.

To clean any copper...just sap some steak sauce/brown sauce with a Q tip wait 5 mins depending how bad it was ...dap off with clean Q tip and rince with 91+% rubbing alcohol let dry and done...try it on a penny🙂

I need to do this as my water valve is slightly leaking coolant from the bottom, do I need to drain coolant first before you undo the jubillee clips? (I have only recently chanhes it all and so am obvs reluctant to do that)

Peter, where did you find the diagrams for the vaccum routing. Thanks for the great videos.

VERY helpful! Thank you!! Creating videos is a pain. I really appreciate that you made this one.

Hi Peter, The brake reservoir on my XJS is in same condition as your was. I am trying to unbolt the reservoir but my bolt keeps on spinning. Any idea on how solve this issue?

At 3:38 you say you are going to leave a link to where you found the wiring diagrams for the Lucas motor. I think that's what Broke Ass Civic below wanted to know, as do I.

Greetings. Quick question. Colour is Soverign Gold Metallic? Same as mine... Regards, Christian

Hello Peter! I have to do the other side. Is it that easy or a nightmare?

The Supplementary Air Valve is not the same as the Extra Air Valve (Auxilary Air Valve). The EAV is on the LHS of the engine and regulating the idle. The SAV is activated when the A/C compressor kicks in to raise idle.