Stuck horn in 1986 jaguar xjs

The starter relay is located on the right side of the engine bay along the drip rail under a small black plastic shield.

From the left side of the engine bay the pump is visable below the front of the air filter. It is fillable with a long funnel.

oil sending sensor could be bad. I know a few different type of cars have trouble with the oil sending unit. They all pretty much do the same thing, "oil light comes on at idle and goes off as you drive". But on the other hand it could be a little more serious.

There are two 13mm bolts in the back window under the carpet that have to be removed. Remove the two plastic screws, Remove the carpet and find the two 13mm bolts..

one relay is going to work both horns if there are two horns.
horns are different than relays.
all horns are ran from one relay.
the horns are only different in sounds.
if one horn is not working and the other is its the horn itself.
disconnect the horn itself and listen for the relay clicking .

faulty geabox switch they do give problems

You may find it in this document if you download it.

www.arh.ee/jaguar/Xjs_help.doc

Download this document and you may find it.

www.arh.ee/jaguar/Xjs_help.doc

Most probably is the crank sensor under engine worn out. )0 % trobleshut starts here.
Einar Norway

the pump is behind the spare wheel in the boot. May have a plastic cover over it also. Has two wires and one pipe in and one pipe out. Fuel filtyer is in line with it.