XJ XJ6 / XJR6 ( X300 ) 1995-1997

1995 x300 Left Front Signals.Lamps don't work

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Old Sep 10, 2021 | 07:03 AM
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Default 1995 x300 Left Front Signals.Lamps don't work

I noticed recently that the front left signal lamp is not working, the repeater and the side marker for the front left either. Not even on Park lamp setting. Does the left/right side have separate fuses?? The rear left lamps work fine.

Is there a common ground for these 3 lamps? Where is it located?

Thanks!!
Dan
 
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Old Sep 10, 2021 | 07:09 AM
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Have a look at the very corner of the guard, where it meets the lower shield (if still fitted), and you will see a Multi Pin plug and socket. Separate them, clean them with Lemon Juice, and rinse with WD40 (or similar), reconnect and see if that simple thing fixes it.

It did, on both X300's, and both sides.

Mine had NO under tray, so access was 20 seconds.
 
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Old Sep 10, 2021 | 07:16 AM
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Thanks for the quick reply!!!! So if I raise the car and take a look at the very corner there is a 4 wire plug i'm assuming??
 
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Old Sep 13, 2021 | 06:36 AM
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Basically yes.

As I said, mine had no undertrays, so they were in my face. If yours has that undertray you will need to get in behind it.Maybe pull back the lower corner of the guard liner.

More than 4 wires from memory (haha on the memory), never counted them. The Green Growth was the problem.

The 2 S Type X200's, same problem, and solved the same way. Different location of course.
 
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Old Sep 13, 2021 | 06:50 AM
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well it seems my problem source is the headlamp control unit that sits behind the row of relays up front near the radiator. When I turn on the right hand signals I hear a clicking from the right side module. The left, dead as a door nail.

I found and ordered a control box on ebay. The same with the tail panel. Ordered from Ebay so let's see if that solves my problem!!

Cheers!
Dan
 
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Old Sep 13, 2021 | 07:30 AM
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Bugga,

I remember those mongrels on the XJ40 cars, drove me to drink in those days.

I would check those multi pin plugs just the same.
My reasoning is that if the connection there is AWOL, the module cannot "send" a signal, so does nothing.
The click, click, click of them is also "load related", so once again, connection issues = no load, so no clicking.

Might as well cover that base while waiting.
 
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Old Sep 13, 2021 | 07:33 AM
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I did find the multi plug but mine was perfectly clean so it's not that

Dan
 
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Old Sep 19, 2021 | 01:37 PM
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Hi Dan,

You can find the schematic for the turn signals on pdf page 101 of the document at the link below:

Jaguar X300 Electrical Guide 1995

The module is grounded at the left bulkhead ground post.

Power to the left hand turn signal circuit comes from Fuse #5 (10A) in the left side engine bay fuse box.

We'll look forward to hearing what you figure out.

Cheers,

Don

 
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Old Sep 19, 2021 | 07:03 PM
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Don

I have power at fuse #5 10 amp, I have power going into the front left lamp control module. If I remove the black connector from it and use my power probe on the set of 4 wires (most of them green) in the lower left most row I can get the front signal bulbs, side marker and side repeater to come on. Which confirms the ground is good and the wiring to the bulbs is good. SO, now I wonder if the REAR lamp control module plays into this?? When I put my left turn signal on, the rear left lamp flashes very fast. Like if you have a bulb out. So that should mean the turn signal switch is OK? I swapped out the front lamp control box from the right side where it was working to the left side........ the left still won't work. I will check that ground at the bulkhead. That may be the problem as the ground for the actual bulbs is at the forward grounding pin (under air filter box). Unless the rear control module is bad also, because i'm having trouble with the outer most right REAR lamp also. The stop lamp works but not the tail lamp....... I tested with my power probe at the pin that goes to the lamp itself in the rear lamp panel that holds the bulbs and I'm able to get the light to come on that way, also putting power at the light blue wire at the rear control module connector also the bulb comes on so the problem must be in that box?

Let me know what you think
 
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Old Sep 21, 2021 | 11:24 AM
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OK, I checked the grounding pin at the left bulkhead. No problems there. I checked if I had ground connections to the black connector going to the left front lamp module. No problem there either. So I have power and I have ground to the lamp control module. Funny thing is I can swap the right hand working module to the left side and the left side still doesn't work! This leads me to believe the trouble comes from the REAR lamp module??

Anyone chime in ?
 
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Old Sep 21, 2021 | 02:45 PM
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I can't recall for certain, but the left and right modules may not be interchangeable wiring-wise. Check the schematics for the connector pinouts.
 
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Old Sep 21, 2021 | 03:21 PM
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Don,

Yes, it seems the 2 boxes look the same...... But I do see in the schematics that the front and rear lamp modules are interconnected so I will replace that first and see how it goes

Dan
 
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Old Oct 12, 2021 | 05:53 PM
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Hello again guys

Saga continues. after replacing the rear box (got the outer most lamp working on the right side now!) I also replaced both left and right boxes in the front. Same issue... It seems also I have intermittent signal when the turn signal is turned on for both sides. Left side does not work, right side does. So the left box has power in from the brown/green wire, the red wire and has signal from the turn signal when left is applied.... I also have good ground at the black wire so it seems everything is coming to the box.... but nothing going out of it..... where do the lamps pick up their "POWER" from?? I have ground at the side marker, front signal holder and side repeater. the problem is the POWER........ I can only assume the power comes from the box and goes down to each lamp when commanded...... if there was a common power post inside a connector I can understand it could be a connector issue but can someone let me know if that is so?? That for example the box sends the power to the multi connector and then the power is distributed within that connector?? I highly doubt the connectors were made that way!

Very VERY strange!!

Dan
 
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Old Oct 12, 2021 | 06:56 PM
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In the 4 corners of the car underneath there is a black 13 pin connector that can get corroded

This is where most of your small external ligh wiring goes through

These connectors are easy to obtain if needed

Some of the lamps have a design where the 2 wires coming out of the glass bulb itself can be bent out to make better contact inside the socket

Concerning the exterior light control module in 95 there are 2 , Front and aft

After production # X they switched to a single lamp control module in the trunk

What is the part # of your lamp module ?

What is the last 6 digits of your VIN #

Example 72XXXX




 

Last edited by Parker 7; Oct 12, 2021 at 07:21 PM.
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Old Oct 12, 2021 | 07:58 PM
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Originally Posted by Parker 7
In the 4 corners of the car underneath there is a black 13 pin connector that can get corroded

This is where most of your small external ligh wiring goes through

These connectors are easy to obtain if needed

Some of the lamps have a design where the 2 wires coming out of the glass bulb itself can be bent out to make better contact inside the socket

Concerning the exterior light control module in 95 there are 2 , Front and aft

After production # X they switched to a single lamp control module in the trunk

What is the part # of your lamp module ?

What is the last 6 digits of your VIN #

Example 72XXXX





Hello the last of the VIN: 721022 the part # of the box I have is LNA2240BA What I find super strange is i've traced the power into the box. I have used a power probe on the wires going to the lamps themselves from the box and given 12v and the lights come on, meaning their corresponding grounds are OK. But I am having an issue getting Power to the lamps...... the marker lamp used to work on the right side but now it's dead, and so is the pilot lamp in the low beam............ after I was probing power to wires in the connectors to the left light module the marker/pilot on right side stopped working. Bulbs are fine............... do these have relays/fuses running them? (Marker, pilot lamps)

 
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Old Oct 12, 2021 | 08:04 PM
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See page 95 section 9

739427 is the change # point so you have the old version

jagrepair.com/images/AutoRepairPhotos/jagxj1995.pdf

The black wires are the grounds

See parts Cat

Genuine Bulb Failure Module For Jaguar Xj 1995 - 1997 (from 720125 To 812255) Classic | Jaguar Land Rover Classic Parts

LNA2240BA for the front , the rear is a 45BA so not interchangeable

Chasing down the small exterior lights can be nerve wrecking
 

Last edited by Parker 7; Oct 12, 2021 at 08:20 PM.
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Old Oct 12, 2021 | 08:19 PM
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right the front left and front right are interchangeable though. I have done that. Also purchased 2 supposedly "tested" good boxes, installed them. Still same problem. Do you know by chance which wires at the multi connector in the lower part of the front fenders are supposed to have power/switched power? AND, if it's the Pin side of the connector or the female side that is supposed to bring in the feed?? I'm at the end of my rope here.........
 
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Old Oct 12, 2021 | 08:21 PM
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Give me a bit of time , multitasking
 
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Old Oct 12, 2021 | 08:23 PM
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Thank you Sir! I've pretty much tested everything...... Looks like the weak link is between the front lamp module (left side) and the lamps themselves

Waiting for reply
 
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Old Oct 12, 2021 | 08:26 PM
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The 13 pin connector is the BL1 for the left and BR1 for the right
 
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