Hazard light problem - wont switch off.

[maximum velocity]

Hi got a jaguar xf 3.0D on a 10 plate, had it for 4 weeks now.

 

Strange problem just happened, car was parked outside, neighbour knocked the door to tell me my hazard lights were flashing, (No alarm had gone off) couldn't knock them off any way I tried so phoned jag assist who sent out an AA man who was on the line to jag assist guy.

 

Only way they were able to knock the lights off was to disconnect the battery and then reattach it. Basically a reset.

 

Got to take the car down to Jag in the morning to see what the problem is, just wondering if anyone else has had this problem.

[Jaguar Owners Club]

Hi Mark

 

not heard of this one before....let us know how you get on

 

Regards    Trevor

[maximum velocity]

Hi Mark

 

not heard of this one before....let us know how you get on

 

Regards    Trevor

Hi Trevor.

It was a water leak travelling across some cross section into the rear junction/relay box (in the boot) causing corrosion on the contacts. They had to fix the problem where the water was coming in and replace the relay box. seems ok now fingers crossed.

Got the impression from the Jaguar Assist guy I phoned when this first happened, that he new what this fault was before he even saw the car. so he must have come across it before.

mark.

[Jaguar Owners Club]

Hi Mark

 

Thanks for letting us know what the problem was...and how it was rectified. Very useful for future reference!

With the amount of rain we have had just recently I'm not surprised its found its way into everywhere.

 

Regards    Trevor

[Mistersquiz]

Quote

I just found this post when I net searched Jaguar XF hazard.... Seems like I may have the same issue, had a nightmare driving home yesterday with people flashing lights at me etc. because my hazards were on. Only I knew they wouldn't turn off .

 

[MattG32]

This happened to me today, hazards came on several times whilst driving. Only short-term remedy was pulling over & switching ignition off. Also, Eco stop-start has stopped working simultaneous to the hazard problem. I assume they are related faults. 

[MattG32]

On ‎12‎/‎4‎/‎2018 at 5:51 PM, MattG32 said:

This happened to me today, hazards came on several times whilst driving. Only short-term remedy was pulling over & switching ignition off. Also, Eco stop-start has stopped working simultaneous to the hazard problem. I assume they are related faults. 

Three days since this occurred, and, touch wood, no further problems. 

Keeping 'em crossed!

[Alan Lloyd]

This is happening to me right now. I am checking the sequences, but seems like the problem is triggered by locking on the door handle.

I have no idea what to do.

Alan Lloyd

[Alan Lloyd]

No! it has a mind of its own. If I leave the car unlocked they come on, If I lock they com. on and will not turn off. If they turn off they come back on later.

[Stephen Angel]

It as just happened to my car hazard lights come on and can not stop them I have had to disconnect the battery.

[KHDGSA]

Yep, the latest electrical fault for mine also. Hazards come on when I switch off the ignition, and only disconnecting the battery will stop it.

[Crawford Gray]

Hi I have the same problem on my 2010xf where is the hazard relay situated,or what number is it .

Thanks

[Christian Meunier]

I had the same problem. Disconnecting the battery is a temporary solution. To fix it for good, you need to access the CJB (Central Junction Box) in the rear trunk. It is located on the right hand side of the trunk. You must remove the fabric liner. Once you have access to the CJB (box right  above the battery with the 3 big relays), disconnect the positive from the battery. There are two connectors close to the floor (lower portion of the CJB). One is brown and one is purple. The problem is with the brown one. Since you are there, fix both of them! Disconnect them. Wwhen disconnecting the purple one, the parking lights will turn on (this is ok). Rub your finger on the connectors, you will feel moisture. Use a hair dryer or a heat gun and dry them. You will see some corrosion on the pins (CJB). I used a file to remove the corrosion. I also used a tiny screwdriver (used to fix watches) to scrape the female pins inside the connectors. Once completed, plug them back and reconnect the battery. Try the hazards by pressing the console button. If not working properly, repeat the file and tiny screwdriver steps. Once everything is ok, disconnect the two connectors (brown and purple) and add dielectric grease to the connectors. Plug them back and you should be good to go!

[LairdScooby]

On the premise that prevention is better than cure, it would probably pay to rub some silicone grease into the boot seal, leave it 20-30 minutes to soak in then wipe off gently. Also clean the boot lid around where it meets the seal. Try and find out where the water is getting in and fix the ingress. For what it's worth, silicone grease is a good alternative to dielectric grease, both are waterproof and non-carbon based and (i'm told by someone who said he knew) are near enough identical. Silicone grease tends to be more wallet-friendly and easier to find though.