Not
positive but you might have to remove dashboard
SOURCE: 1988 Jaguar Vanden replace headlight
What you need to do is remove the 2 screws on the top bezel from inside the engine bay, then underneath the outer corner of the plastic headlamp surround there is a philips screw, (put your head under neath car near from wheel) loosen the screw, do not remove it, now the headlamp plastic bezel/surround will come free enough so you can get a philips screwdriver in through the middle of the headlamp surround, there is a chrome retaining ring holding the headlamp in place, loosen the 3 philips screws (do not remove) The retaining ring will rotate and you can slide the ring out from the outer edge of the headlamp surround. The headlamp will then come out throught the middle of the surround, disconnect the 3 pin multiplug and reverse process for install.
SOURCE: 1989 jaguar xjs v12 fuel mixture
Chances are the coolant temperature sensor or its wiring have failed, or the vacuum line to the MAP sensor is leaky or broken (I believe the V12 in '89 guise uses MAP sensors). The MAP sensor measures Manifold Absolute Pressure. Along with this pressure the ECU looks at engine RPM. It also measures air temperature. Knowing pressure and temperature we know density, and knowing engine speed tells us how much volume of air is going through the engine. All of this together is computed into air mass and is used to calculate how much fuel mass should be admitted. If the vacuum line is broken, the ECU reads less vacuum and produces rich mixture thinking that the engine is under high load.
SOURCE: p0411 1995 jaguar xjs
secondary air injection system incorrect downstream flow. this has to do with the air pump that is driven by one of the fan belts. if the check valve is not operating or the one way valve is burned through. it will trigger this code. check the valve on each side of the exhaust if v12(one on each part of manifold in L6) and remove the hose and start the engine. if exhaust flows through replace the valve/s. this can also be triggered by excessive moisture build up inside the pump and then freezing overnight not allowing the pump to rotate(pump).
SOURCE: 1995 Jaguar convertable XJS quarter light windows wont go up
The rear windows are controlled by a timer in the top's ECU. If
the
rear windows stop fully closing before your top is closed, the
problem
MAY be with top's hydraulic system.
Check your top's hydraulic
reserve tank for low fluid level. Lack
of fluid will greatly delay
the top's closing sequence, leaving
those rear windows partially
open.
Your top's hydraulic pump system is located beneath the right side
of
the cubby/storage box behind the front seats. Raise the cover
and
you'll see a removable trim panel on the right side. The pump
is
behind that access panel.
You can use power steering fluid to top
off the tank, but don't
fill it above level indicator line. You
may have to add more fluid
after you cycle the top up and down to
get the air bubbles out of
the lines.
It could also be a relay. On a 95 the relays that are in the trunk above the battery.
Perhaps,
just switching the relays might prove which one is failing..
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