My Jag's been "in storage" for several years and I'm just in the
process of making it roadworthy again.

The brake lights used to work, but now they do not come on.  Every
thing else is working okay, and the only trouble indication I have is
for a burned out side marker light, and the fog lights I removed and
did not put resistors in the plugs.

I've had all the electricals under the air-con fans - both sides - out
and in again, more than once on the passenger's side where all the
relays and other sparky stuff resides.

The fuses are all okay - other lights on the same fuse as the brake
lights are working.

Can anyone tell me where is the relay(s) for the brake lights located,
and what's the best procedure to troubleshoot this problem.

I think this model has the brake light switch mounted as a mechanical
switch behind/above the brake pedal inside the driver's area.

Any help is appreciated.

I suppose to keep this car running well I should buy a manual, like
Haynes or something.  I have the online thingee from Jag Lovers but it
seems to omit more than it shows, and is only good for the odd thing -
not too comprehensive.

Do the Haynes manuals always have a wiring diagram of sorts?