So I get into my XJR to head home from work, and am greeted with the "Park Brake Fault" message, and the EPB won't release. I try a couple different things, with no luck, and catch a ride home with a co-worker. I research this site, and find several threads with a bunch of different things to try. I copy several instructions to a new file and bring it with me to work the next day. After trying the various reset procedures and other options, I use this post from the S forum and the below instructions I found in the XJ forum (sorry I couldn't find the original post to link to):

a) disconnected the car battery and removed fuse 32 from the fuse box next to the battery
b) took out the right hand carpeting in the boot (trunk for any US people) and took the connector off the bottom of the black plastic EPB module (it has 4 thick wires and with brown +ve and black -ve although power supplied through fuse 32)
c) placed a 30 amp blade fuse in the slot with the red/white cable wedged with a small crimped copper wire (otherwise it is a loose fit). Spare fuses are in the compartment on the panel at the rear of the boot to the left of centre
d) connected a cable (I stripped a bit of 2.5mm twin&earth) with a normal spade crimp connector to the green/white
e) I used a battery booster to provide 12V and connected -ve to the other side of the 30A fuse and the +ve to the green/white connected cable for a second or two.
You should hear the electric motor run and hopefully the lovely sound of your brakes disengaging!

I've attached a couple pictures to help illustrate what is described above. This is for an '04 XJR with Brembo brakes. I believe the '06 and later have a different looking EPB module. I decided to make a jumper wire with spade connectors on the ends, and keep it in the boot next to the battery in case this happens again. A good thing to have as an emergency release!

 

Sorry to hear about your problems.........nice write up though, thanks for sharing

 

Looks just like the S-Type.

 

How does "the connector off the bottom of the black plastic EPB module" release? Dont want to hurt it. Thanks, streamsaver

 

I have xj6 2009. I try to find the brake module in the trunk but is not there. I saw pics and is near rear electric module in right side but is not there. Any idea where is? Thank you.

 

 

Remove the box in your photograph. The EPB is the black plastic box behind it. At least it is in my 2009 X358. I have seen several variations of location in the X350/358.

 

this is what you will see behind the aluminium clad module. remove the upper nut arrowed. Unhook the frame from the lower slot arrowed. The black plastic EPB module is attached to the frame and you can now access the plug.

 

The plug is lurking in the top right hand corner of the photograph. My fingers were neither small enough nor strong enough to remove it in situ.