Wiring Harness
#21
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
Thanks for the pic Rob and once all that is in a restricted space with the front of dash in place it becomes a nightmare.
One of the greatest difficulties we had other than that was T'ing in those cursed harnesses up the B pillar that you mention earlier for the interior lights & switches. There is so little access space to the sill harness. I took a drill to my LHS to increase it a bit. The air was blue with bad language.
One of the greatest difficulties we had other than that was T'ing in those cursed harnesses up the B pillar that you mention earlier for the interior lights & switches. There is so little access space to the sill harness. I took a drill to my LHS to increase it a bit. The air was blue with bad language.
Last edited by Glyn M Ruck; 12-22-2022 at 03:56 AM.
#22
Pulling the main harnesses is no fun & we did not have the old harness to aid this. My car was stripped of all harnesses prior to media blasting. We used an electricians conduit wire puller. My sills were rust free. Boroscope examined via the plug in the rear wheel arch. This car has harness temporarily held in place by Zip Ties. This is member Orlando's car under build. The S Type has a 3 piece sill unlike the Mk2 to stiffen the car. Much of the harness is behind the Dash. The earlier cars are somewhat different to the S Type.
Of course, once you've got to the old harness, it may all be unnecessary as the part running through the sills is very well protected.
The following users liked this post:
Glyn M Ruck (12-22-2022)
#23
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
The Zip Tie was only invented in 1958 and Jaguar did not use them on our old cars. What they did use on some cars was stripping with multiple holes equidistant from one another & a pop stud that went through selected holes on both ends once suitably trimmed for length required.
On the OP's S Type I would replace the main behind dash to engine compartment harness at minimum. Then plug all the sub harnesses into it if considered in safe condition.
Generally monitored by which fuses blow regularly & why.
On the OP's S Type I would replace the main behind dash to engine compartment harness at minimum. Then plug all the sub harnesses into it if considered in safe condition.
Generally monitored by which fuses blow regularly & why.
Last edited by Glyn M Ruck; 12-22-2022 at 06:59 AM.
#24
Using multiple fuses
One of the signature limitations of the Mark 2 wiring is that there are only two fuses to protect the whole system. Not only is this a very poor protection scheme but it also makes trouble shooting very hard indeed,
I fitted a standard new wiring harness to my car and added a multiple fuse block. This is very easy since the power wires all converge at the original fuse holder and it is a simple matter to spread them out individually so that each one has its own fuse.
Attached is a copy of my supplemental manual that shows some of the details. Although I have done many other modifications to the wiring at least you can see the multiple fuse approach I took.
Also attached is the maker data sheet for the fuse holder.
Attached Files
I fitted a standard new wiring harness to my car and added a multiple fuse block. This is very easy since the power wires all converge at the original fuse holder and it is a simple matter to spread them out individually so that each one has its own fuse.
Attached is a copy of my supplemental manual that shows some of the details. Although I have done many other modifications to the wiring at least you can see the multiple fuse approach I took.
Also attached is the maker data sheet for the fuse holder.
Attached Files
The following 3 users liked this post by BSM:
#25
There's a photo in Paul Skilleter's 'Jaguar Saloon Cars' (and I think some of the other books) of an S type 'rolling chassis.' It has no external panels and, in particular no outer sills. Since there's no outer sill to constrain the harness, Jaguar attached it to the intermediate sill (probably with their usual pop studs - it's hard to be absolutely sure from the picture). It could be as a consequence of seeing it, that a few people feel they should fasten the cable to something.
Paul wrote that the car was for a European coach builder - I wonder if it became either the Frua or Bertone S type?
I don't recall either fuse ever blowing in my Mk2. Though given their size (rated current, fast or slow blow) it's not surprising without a very serious short circuit.
Paul wrote that the car was for a European coach builder - I wonder if it became either the Frua or Bertone S type?
I don't recall either fuse ever blowing in my Mk2. Though given their size (rated current, fast or slow blow) it's not surprising without a very serious short circuit.
#26
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
One of the signature limitations of the Mark 2 wiring is that there are only two fuses to protect the whole system. Not only is this a very poor protection scheme but it also makes trouble shooting very hard indeed,
I fitted a standard new wiring harness to my car and added a multiple fuse block. This is very easy since the power wires all converge at the original fuse holder and it is a simple matter to spread them out individually so that each one has its own fuse.
Attached is a copy of my supplemental manual that shows some of the details. Although I have done many other modifications to the wiring at least you can see the multiple fuse approach I took.
Also attached is the maker data sheet for the fuse holder.
Attached Files
I fitted a standard new wiring harness to my car and added a multiple fuse block. This is very easy since the power wires all converge at the original fuse holder and it is a simple matter to spread them out individually so that each one has its own fuse.
Attached is a copy of my supplemental manual that shows some of the details. Although I have done many other modifications to the wiring at least you can see the multiple fuse approach I took.
Also attached is the maker data sheet for the fuse holder.
Attached Files
Last edited by Glyn M Ruck; 12-22-2022 at 08:39 PM.
#27
The following users liked this post:
Glyn M Ruck (12-22-2022)
#28
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
#29
Join Date: Nov 2012
Location: Joyner, Queensland, Australia
Posts: 970
Received 1,082 Likes
on
633 Posts
Now I understand what Felixbobcat is concerned about and I agree a new harness is definitely in order.
At this point may I suggest photo and photo and again photo every connection.
It is extremely important to photo the behind the dash switch panel connections on every switch.
In addition, try and remove the loom in one piece and label every connection even though it will be eventually discarded.
I have just gone through this process with a friends E type. and am prepared.
The bare body shell is in a rotisserie and I expect it could be 12 months at a minimum before the new loom will be fitted
Cheers
At this point may I suggest photo and photo and again photo every connection.
It is extremely important to photo the behind the dash switch panel connections on every switch.
In addition, try and remove the loom in one piece and label every connection even though it will be eventually discarded.
I have just gone through this process with a friends E type. and am prepared.
The bare body shell is in a rotisserie and I expect it could be 12 months at a minimum before the new loom will be fitted
Cheers
The following 2 users liked this post by Bill Mac:
Glyn M Ruck (12-29-2022),
S-Type Owner (12-30-2022)
#30
#31
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
Have this blown up & laminated. What I have on my garage wall. It is high resolution as you will see if you blow it up. Just download the pdf & blow up & you will see what I mean. And it's fully colour coded.
https://www.jaguarforums.com/forum/a...ram-hi-res.pdf
Example ~ S Type.
https://www.jaguarforums.com/forum/a...ram-hi-res.pdf
Example ~ S Type.
Last edited by Glyn M Ruck; 12-30-2022 at 02:16 AM.
#32
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
Now I understand what Felixbobcat is concerned about and I agree a new harness is definitely in order.
At this point may I suggest photo and photo and again photo every connection.
It is extremely important to photo the behind the dash switch panel connections on every switch.
In addition, try and remove the loom in one piece and label every connection even though it will be eventually discarded.
I have just gone through this process with a friends E type. and am prepared.
The bare body shell is in a rotisserie and I expect it could be 12 months at a minimum before the new loom will be fitted
Cheers
At this point may I suggest photo and photo and again photo every connection.
It is extremely important to photo the behind the dash switch panel connections on every switch.
In addition, try and remove the loom in one piece and label every connection even though it will be eventually discarded.
I have just gone through this process with a friends E type. and am prepared.
The bare body shell is in a rotisserie and I expect it could be 12 months at a minimum before the new loom will be fitted
Cheers
A further example ~ and you can keep on blowing it up without it falling apart. It is proper hi res. See example above of cigar lighter
Last edited by Glyn M Ruck; 12-30-2022 at 02:45 AM.
The following users liked this post:
S-Type Owner (12-30-2022)
#33
Join Date: Nov 2012
Location: Joyner, Queensland, Australia
Posts: 970
Received 1,082 Likes
on
633 Posts
Felixbobcat
What sort of Jag do you own?
Ther are major electrical and wiring differences between MK1/Mk2 and S types.
The Mk1 and MK2 are relatively simple with only two fuses in the whole car in the engine bay
The S type is much more complex with a number of fuses incorporated in the instrument panel etc.
I am just trying to ensure you get the correct advice for your car.
Cheers
What sort of Jag do you own?
Ther are major electrical and wiring differences between MK1/Mk2 and S types.
The Mk1 and MK2 are relatively simple with only two fuses in the whole car in the engine bay
The S type is much more complex with a number of fuses incorporated in the instrument panel etc.
I am just trying to ensure you get the correct advice for your car.
Cheers
#34
Originally Posted by Bill Mac;[url=tel:2599318
2599318[/url]]Felixbobcat
What sort of Jag do you own?
Ther are major electrical and wiring differences between MK1/Mk2 and S types.
The Mk1 and MK2 are relatively simple with only two fuses in the whole car in the engine bay
The S type is much more complex with a number of fuses incorporated in the instrument panel etc.
I am just trying to ensure you get the correct advice for your car.
Cheers
What sort of Jag do you own?
Ther are major electrical and wiring differences between MK1/Mk2 and S types.
The Mk1 and MK2 are relatively simple with only two fuses in the whole car in the engine bay
The S type is much more complex with a number of fuses incorporated in the instrument panel etc.
I am just trying to ensure you get the correct advice for your car.
Cheers
#35
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
And the high res colour diagram I have provided is for the S Type. I took a look at your profile to see what car you had. Stick it in your signature as well then people can see easily as I have below.
Last edited by Glyn M Ruck; 12-31-2022 at 04:14 AM.
#36
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
#38
The following 2 users liked this post by Felixbobcat:
littlelic69 (01-10-2023),
S-Type Owner (01-01-2023)
#39
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,533
Received 1,486 Likes
on
1,156 Posts
The following users liked this post:
S-Type Owner (01-01-2023)
#40
The following 4 users liked this post by Peter3442: