V12 fuel injection wire harness
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I'm afraid I recently changed jobs and no longer have spare time to build one, or even work on my own car!
The job is pretty simple, just time consuming. I think the best method is to take your old harness out, label each plug and strip off the loom covering. Then build your own using the original as a pattern. I made mine slightly longer so I could move the wires up and out of the valley.
The job is pretty simple, just time consuming. I think the best method is to take your old harness out, label each plug and strip off the loom covering. Then build your own using the original as a pattern. I made mine slightly longer so I could move the wires up and out of the valley.
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I built my own recently. I bought some wire from this ebay seller;
brussellex | eBay
I couldn't any high temp harness in Japan, so I had to buy from abroad...
I think the cheapest EV1 connector will be this;
BMW E30 Bosch Fuel Injector Connector M3 M5 318 325 EFI EV1 | eBay
What is to be aware of is the later style EV1 connectors with a quick release spring won't fit to pre facelift XJSs without modification.
In the end it cost me like $100...
The wires were like $35, the 12 connectors about $40, 6pin male & female connector $8 each (of course you can use cheaper ones but I bought good waterproof ones)
brussellex | eBay
I couldn't any high temp harness in Japan, so I had to buy from abroad...
I think the cheapest EV1 connector will be this;
BMW E30 Bosch Fuel Injector Connector M3 M5 318 325 EFI EV1 | eBay
What is to be aware of is the later style EV1 connectors with a quick release spring won't fit to pre facelift XJSs without modification.
In the end it cost me like $100...
The wires were like $35, the 12 connectors about $40, 6pin male & female connector $8 each (of course you can use cheaper ones but I bought good waterproof ones)
Last edited by Japthug; 06-07-2014 at 03:30 PM.
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someguywithajag (05-11-2018)
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Hi Bill,
when I get around to removing and rebuilding it, I'll have loads of pictures
If you were wondering, if the 5.3l is the same as the 6.0l, have a look here: v12s - Official Website
According to that, my harness would be the same as until end of 1990 (VIN 17846).
But as said, I'll do a proper "how to" when I get my harness ready Might take a few weeks/months though!
when I get around to removing and rebuilding it, I'll have loads of pictures
If you were wondering, if the 5.3l is the same as the 6.0l, have a look here: v12s - Official Website
According to that, my harness would be the same as until end of 1990 (VIN 17846).
But as said, I'll do a proper "how to" when I get my harness ready Might take a few weeks/months though!
The following users liked this post:
Bill C (06-08-2014)
#30
Thanks Daim, yes I'd be interested in seeing what an original harness looks like on the 5.3.
If I read some of the previous posts correctly, then it seems like on the 5.3, the harness enters the "V" from the front of the engine. On mine, it enters from the back. I'm also curious as to whether the ribbed shield on mine is also standard on the 5.3's.
I've attached a not too great a photo which shows what mine looks like.
Bill
If I read some of the previous posts correctly, then it seems like on the 5.3, the harness enters the "V" from the front of the engine. On mine, it enters from the back. I'm also curious as to whether the ribbed shield on mine is also standard on the 5.3's.
I've attached a not too great a photo which shows what mine looks like.
Bill
#31
If I remember correctly, the harness enters the V section from behind (at least as far as I have seen). I've got the front end of mine basically in pieces and there aren't many wires/cables in the front there. Most wires are lead in from the rear (as far as I can tell).
Just a question after seeing yours, you have the Marelli ignition. Does the front coil pack sit there properly or is it, like on the '89.5 fitted above the other pack?
Just a question after seeing yours, you have the Marelli ignition. Does the front coil pack sit there properly or is it, like on the '89.5 fitted above the other pack?
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Bill C (06-08-2014)
#32
Thanks Daim, yes I'd be interested in seeing what an original harness looks like on the 5.3.
If I read some of the previous posts correctly, then it seems like on the 5.3, the harness enters the "V" from the front of the engine. On mine, it enters from the back. I'm also curious as to whether the ribbed shield on mine is also standard on the 5.3's.
I've attached a not too great a photo which shows what mine looks like.
Bill
If I read some of the previous posts correctly, then it seems like on the 5.3, the harness enters the "V" from the front of the engine. On mine, it enters from the back. I'm also curious as to whether the ribbed shield on mine is also standard on the 5.3's.
I've attached a not too great a photo which shows what mine looks like.
Bill
When you cut the tape and disassemble the harness you will see what it is like.
The second pic shows the injector harness connector.
The following 2 users liked this post by Japthug:
Bill C (06-08-2014),
FerrariGuy (07-03-2024)
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Thanks Japthug,
I'll be the first to admit that I am a novice at this automotive DIY stuff but, I'm fairly certain that it's not a Facelift/Pre-facelift issue. I believe it's a 5.3/6.0 difference. There is nothing coming in from the front of the engine. As you say, there are other wires included in the harness (A/C, and another I didn't recognize) but the entire bundle starts out inside the right wing, goes to the firewall, and enters from the back of the engine.
If I were home, I'd try and get a better photo, but the one I posted just above here is the only other one I've got.
One of the things I'm trying to figure out is, is that ribbed shielding only common on the 6.0's or were they also original for the 5.3's?
Bill
I'll be the first to admit that I am a novice at this automotive DIY stuff but, I'm fairly certain that it's not a Facelift/Pre-facelift issue. I believe it's a 5.3/6.0 difference. There is nothing coming in from the front of the engine. As you say, there are other wires included in the harness (A/C, and another I didn't recognize) but the entire bundle starts out inside the right wing, goes to the firewall, and enters from the back of the engine.
If I were home, I'd try and get a better photo, but the one I posted just above here is the only other one I've got.
One of the things I'm trying to figure out is, is that ribbed shielding only common on the 6.0's or were they also original for the 5.3's?
Bill
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gregh (06-10-2014)
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I replaced my wiring harness earlier this year, it is not a difficult thing to do, it may sound complex but when you start its quite easy, I refer you to this thread that has further information https://www.jaguarforums.com/forum/x...st-pt2-113163/ post2 and FI Harness Rebuild
Sorry I have not read the complete thread and if I have repeated something so be it.
Sorry I have not read the complete thread and if I have repeated something so be it.
#39
Thanks Japthug,
I'll be the first to admit that I am a novice at this automotive DIY stuff but, I'm fairly certain that it's not a Facelift/Pre-facelift issue. I believe it's a 5.3/6.0 difference. There is nothing coming in from the front of the engine. As you say, there are other wires included in the harness (A/C, and another I didn't recognize) but the entire bundle starts out inside the right wing, goes to the firewall, and enters from the back of the engine.
If I were home, I'd try and get a better photo, but the one I posted just above here is the only other one I've got.
One of the things I'm trying to figure out is, is that ribbed shielding only common on the 6.0's or were they also original for the 5.3's?
Bill
I'll be the first to admit that I am a novice at this automotive DIY stuff but, I'm fairly certain that it's not a Facelift/Pre-facelift issue. I believe it's a 5.3/6.0 difference. There is nothing coming in from the front of the engine. As you say, there are other wires included in the harness (A/C, and another I didn't recognize) but the entire bundle starts out inside the right wing, goes to the firewall, and enters from the back of the engine.
If I were home, I'd try and get a better photo, but the one I posted just above here is the only other one I've got.
One of the things I'm trying to figure out is, is that ribbed shielding only common on the 6.0's or were they also original for the 5.3's?
Bill
Hi Bill,
I am sorry, you are right, the 6.0 injector harness comes from the behind, according to the the electrical guide the connector is in the right inner fender.
It must be easy to access to it, when you remove the backside cover of the wheel housing you will find it.
The engine cover is unique to the 6.0s.
My facelift 5.3 doesn't have one.
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