[xj40] Circuit 2 failure

XJ40
1

I’m sure you’ve answered this before.
What is the ‘‘Circuit 2 Failure’’? WITH Lightning bolt.–
stephen daugherty
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2

In reply to a message from stephen daugherty sent Sun 13 Jul 2003:

Found it! a 5 orange on the left side kick panel and from bottom on
the left column of fuses. Any idea what that is?–
stephen daugherty
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3

I am getting a ‘‘circuit 2 failure’’ warning on my dash display. I
have no idea of what this means or what to do about it. Can anyone
help me with some information on this?–
Dalton Sr.
Alvin/Texas, United States
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4

In reply to a message from Dalton Sr. sent Tue 21 Sep 2004:

'Circuit 2 ’ failure means that you have a blown fuse in the fuse
box at the bottom of the ‘A’ pillar in the left side footwell
(driver side near your left leg calf on your LHD car).

You should have a ‘lightning bolt’ fuse fail warning on the dash
display too.

[Circuit 1 is the fuse box on the right side ‘A’ pillar, and
Circuit 3 is the fuse box in the centre armrest].–
The original message included these comments:

I am getting a ‘‘circuit 2 failure’’ warning on my dash display. I
have no idea of what this means or what to do about it. Can anyone
help me with some information on this?
Dalton Sr.
Alvin/Texas, United States

–
Bryan N ('91 Sovereign 4.0 L)
Cambridge, United Kingdom
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5

Hi All
I have a strange problem. My '87 Sov continually blows a 5 amp fuse in the
circuit 2 fuse box. The cover indicates that it is in the brake circuit. I
have checked everything I can think of, but everything seems to be working
just fine, including brake lights, ABS, etc. Can’t find anything about it
in any of the manuals, so have come to the end of my troubleshooting
abilities.

Thanks, Nigel

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6

In reply to a message from Nigel MacLennan sent Thu 14 Oct 2004:

Nigel,

Looking at the factory Service Manual which claims to cover
your '87 car, the only 5 Amp fuse I see in the ‘Circuit 2’ (i.e.
Left Hand) fuse box is for the left side front direction indicator
and its repeater lamp. That is identified as fuse #5.

Are you sure you have the correct rating of fuse in the circuit to
which you refer? What is the fuse number?–
The original message included these comments:

I have a strange problem. My '87 Sov continually blows a 5 amp fuse in the
circuit 2 fuse box. The cover indicates that it is in the brake circuit. I
have checked everything I can think of, but everything seems to be working
just fine, including brake lights, ABS, etc. Can’t find anything about it
in any of the manuals, so have come to the end of my troubleshooting
abilities.

–
Bryan N ('91 Sovereign 4.0 L)
Cambridge, United Kingdom
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7

Hi everyone.

Could someone please tell me what means this ‘‘Circuit 2
failure’’. It comes on when the car sits parked longer period
in sunny day (hot day). I think it’s got nothing to do with
hot engine, but some other component getting warm inside the
car. It never happens during winter time, or summer under 20
celcius temperature.
I have cleaned engine temperature sensor connector but that
didnt help.

Any information could be helpfull.
Thanks,
Make–
Snowcat, -89 XJ40
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8

In reply to a message from Snowcat sent Tue 29 May 2012:

‘Circuit 2’ failure indicates that a fuse is blown/missing/has a
bad socket connection in the LEFT side fuse box on the 'A’pillar.

Strange that it only appears when the car is hot but I guess that
could happen if you have a ‘cold solder’ joint on the back of a
fuse socket - not an uncommon occurrence on the early cars.

Firtst check the fuses visually AND electrically (continuity).–
The original message included these comments:

Could someone please tell me what means this ‘‘Circuit 2
failure’’. It comes on when the car sits parked longer period
in sunny day (hot day). I think it’s got nothing to do with
hot engine, but some other component getting warm inside the
car. It never happens during winter time, or summer under 20
celcius temperature.
I have cleaned engine temperature sensor connector but that
didnt help.
Any information could be helpfull.

–
Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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9

In reply to a message from Snowcat sent Tue 29 May 2012:

Make,

Check your auxiliary fan fuse. When I lived in Phoenix I kept
blowing out the fuse (should be same circuit) and took the
vehicle in to dealer to check it out. Turns out the auxiliary
fan had frozen up and that caused the fuse to go, ended up
replacing the auxiliary fan, yours may end up being an easier
fix.

Good Luck–
The original message included these comments:

failure’'. It comes on when the car sits parked longer period
in sunny day (hot day). I think it’s got nothing to do with
hot engine, but some other component getting warm inside the

–
Rob Evenson, '89 XJ40/XJ6
Mobile, AL, United States
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10

In reply to a message from Rob Evenson, sent Tue 29 May 2012:

Thank you Bryan and Rob.

Then it have to be in the fuse box… I guess.
Auxliary fan hardly comes on in my climate area but I have
once heard it, so I think it’s working. I’ll check it
anyway.

If a fuse is burned it’s gone forever, so there must be bad
solder joint or… if the fuse have bad connection… as you
said.

But… now I have very good starting point and know what to
look.

Thank you,
Make–
Snowcat, -89 XJ40
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11

The drivers side turn signal and running light are also not
working. Moved the BFM from the drivers side to passenger and
it is working appropriately. Where to go next? The left turn
signal light is working at the front of the car. The ground
wire to the trunk is shiny clean and free of rust.

1988 xj40–
RECereewe
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12

In reply to a message from RECereewe sent Thu 17 Jul 2014:

A ‘Circuit 2’ failure indicates that you have a blown or
missing fuse (or a bad solder joint at the back of a fuse
holder) in the LEFT side fuse box.

Failure of the left front indicator and side light would
suggest that fuse #5 in the left side fuse box is the culprit.–
The original message included these comments:

The drivers side turn signal and running light are also not
working. Moved the BFM from the drivers side to passenger and
it is working appropriately. Where to go next? The left turn
signal light is working at the front of the car. The ground
wire to the trunk is shiny clean and free of rust.

–
Bryan N, now Jag-less, but fun while it lasted.
Cambridgeshire, United Kingdom
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13

In reply to a message from Bryan N sent Fri 18 Jul 2014:

Sorry I left that out. The Turn signal and running light are
out at the rear of the car. Circuit 2 failure.–
RECereewe
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14

In reply to a message from RECereewe sent Fri 18 Jul 2014:

By ‘running light’ do you mean the tail light?

Do the rear fog and reversing light work on that side?

You may have two blown/missing/bad joint fuses in the left
side fuse box.

First check visually and electrically fuse #7 and then
fuse #12 in that left side fuse box.–
The original message included these comments:

Sorry I left that out. The Turn signal and running light are
out at the rear of the car. Circuit 2 failure.

–
Bryan N, now Jag-less, but fun while it lasted.
Cambridgeshire, United Kingdom
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15

In reply to a message from RECereewe sent Thu 17 Jul 2014:

All right finally paid a fortune and got some solutions:
Mechanic changed the coil and ignition module.

  1. Same problem. Unfortunately after I left the lot.
  2. Took the car back and accidently left the gas cap loose.
  3. Debri in the weep hole at the gas cap.
    Tank filled with some water. Water in the gasoline. Water is
    heavier then gas and was sucked through the fuel filter to
    the engine.
  4. Mechanic cleared the lines, replaced filter.
  5. Original problem presented itself.
    *************** The SOLUTION! *****************
    The Crank Position Sensor can fail intermittently. Being
    electronic it fails at high temperature. Fine at normal
    temperature. The Circuit 2 failure went away once I got the
    car back.

Drove the car 2 hours out and 2 hours back to a family event
yesterday. My family members think I am a little off. It was
like heaven and worth the expense of fixing the Jaguar. I
rebuilt the drivers side seat before going. Is their any
experience better then the windows half open, the sun roof
open, stars overhead, and humming down the road in a Jaguar
xj40? I think not.

Thanks again for all the help.–
REC22
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