That may not be quite the wording but I keep getting this warning on the dash of my car. All the rear lights are fine (except the high level brake light which hasn't worked for a long time, if at all whilst I have had the car). It comes on pretty much every journey but I haven't managed to figure anything specific which triggers it.

Any suggestions?

 

It is almost always the brake pedal switch that is at fault. It disables the cruise control and enables the brake lights when you push on the pedal. Do a search and you will find instructions for replacing it.

 

andyps - Read through the links below. Hopefully one may help to answer your question. I am working on the first one with my own car, since I am getting an error message and the bulb is fine - and I can see the melted wire.

https://www.jaguarforums.com/forum/x...esolved-35083/

https://www.jaguarforums.com/forum/x...ted-why-70927/

The real experts should chime in soon!

 

Thanks guys, will have a look.

 

Just wondering..Do you have have adaptive cruise control in your car?

RJ's comment makes very much sense (a lot better than mine!), but what happens in the case where the adaptive cruise control slows the car and not the brake pedal..

 

No adaptive cruise control, just the regular one (when it works!).

 

I had the same problem on my XK8 and the additional ground install was just the ticket.I also had to examine the plug and found the that the plastic had melted slightly and the prongs were spread. i bent them back closed. I haven't had a problem in over a year now.

 

I had this problem a while ago (cruise unavailable/check rear lights) and I figured it was the brake switch but as suddenly as it appeared it went away. Well it has come back again now for several days and I am planning on bringing the car in to address a bunch of small things, one of which will be to get the switch replaced.

Doug

 

I also have had the 'check rear lights/cruise not available' but apparently found the issue associated with the console 'cruise' switch. It would never occur with the CC off, only with it on. Short of removing the switch and treating with some contact cleaner I 'exercised' it a hundred times and the problem seemed to have gone away.

While the brake switch is the most likely culprit there are other things, such as the rear light grounds and the CC switch that can invoke the message.

 

2006 xkr, 38,00 mi. Like may others I had a check rear lights in the window and the adaptive cruise did not work. I did have a bad console switch, changed that and that didn't help the cruise. Did all the things that have been suggested in this forum. Suggest you do all the easy things first, clean
the bulb contacts, check all the wires and the grounds. If that doesn't work then most likely it is the brake switch. I changed the switch and that fixed it all. See my earlier post on that. Good luck!

 

Same here, I get "check rear lights" after 3 or 4 prods of the brake pedal but no "cruise control inactive" error message, although the adaptive CC doesn't work.

My Jag specialist has told me it's the security & locking control module that needs replacing so I've been looking for a used replacement, any comments anyone please?

 

It's not hard to check the brake switch for continuity. I don't know what car you have, but on mine the middle pair are for the cruise control and the outer pair for the brake lights.

 

oKay here goes

Complaint: on startup, all is well. Then after a few km of driving, the amber warning dash light comes on with " Cruise not available" and " check rear lights" warning text messages.

Correction: " Checked for stored codes . Found P1571. Brake switch fail, order new switch, Removed and replaced faulty switch, clear codes and road test ok"

PART LJB6420BB. "Switch-brake PE Switch"

$198 CDN plus two hours Jaguar dealer labour charges plus taxes.


Hope this helps

 

If your lights are working turn off your Cruise Control and see if you get the fault. Chances are that you have a bad switch.

 

Thanks for that, I didn't realise a bad switch would cause an error code.

I've now checked the error codes & none are shown & as the reader confirms the VIN I think it's probably communicating correctly.

Gus, I get no response at all from the cruise control.

Thanks again for your help.

 

I am suggesting that you turn it off power it off and see if you get the fault.

 

I haven't checked codes yet and will leave that for the shop when I bring the car in. I am 99% certain though that it is the brake switch as the amber light and messages (cruise not available/check rear lights) will come on after a few minutes of driving. The weird thing is that until the warning comes on I am sometimes able to engage the cruise for a few seconds but eventually the "cruise cancelled" notice comes on and I eventually get the amber/messages.

When this happened last year the problem actually totally went away on its own after a couple of weeks but now has obviously come back and doesn't look like it will leave on its own.

Doug

 

Gus, please excuse my ignorance but power what off, there's no response from any of the adaptive cruise control buttons & the handbook makes no mention of an on/off switch?

If it was the brake pedal position switch that was at fault wouldn't that be throwing a code P1571 as reported by Boomersaurus?

 

I believe Gus is referring to the cruise control switch below the shift gate and next to the sport mode switch.
There are two microswitches inside the brake pedal switch, and if just the cc set failed it might not throw a code, but I don't know that for certain.

 

Thanks for that RJ, I thought that button was the Automatic Speed limiting switch, but now I see it's also called the CC on/off switch on cars with adaptive cruise control which don't have auto speed limiting.

Needless to say, that switch has no effect at all either.

Thanks again for your help.