hi guys.
hope everyone is looking forward to the weekend and enjoys it!!
i have a bit of a problem that is more irritating than appears to
be a problem.
when i m driving and the need arises to indicate left, the
repeater/indicater on the dash is flashing fast, as though a bulb
were out.
however, if I get out the car and check, the front/rear/side
indicators are not only working correctly, but at the correct
speed!!
right hand indication dos nt appear to be a problem as yet.
i ve cleaned/checked all earths etc etc and are now stumped as to
a possible problem. I cant find one but like things right. its
bothering me so ideas/suggestions would be appreciated very much!
all the best with thanks in advance.
mark.–
XJ40 1990 Sovereign 4.0 (RHD)
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In reply to a message from XJ40-MARK sent Fri 17 Jul 2009:
XJ40-Mark
Remove the rear cover for the light assembly and pull out
the board that has the light bulbs attached to it. You will
be able to see which one of the bulbs are out. If it’s hard
to tell, put your turn signal on and see if it’s working.
If it is, I’m willing to bet dollars to donuts that one of
the brake lights is out (there are two bulbs for this)
Remember, if the signal is flashing fast it means something
is out. I had a similar problem over a year ago and it was
the brake light.
While you’re down there inspecting the bulbs, pull each one
and check the socket for signs of rust. Use electronic
cleaner to remove any debris or corrosion. If you’re
feeling like Mr. Mechanic, do the same for the other side.
Hope this helps resolve your problem so you can have your
cat on the road this weekend with no worries.
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In reply to a message from Fritterfran sent Fri 17 Jul 2009:
Not on UK cars - we have separate bulbs for the indicators
and the stop lights unlike your NA car but our cars have
side indicator repeater lamps which your NA car doesn’t.
This recent post probably explains Mark’s problem
The original message included these comments:
the brake lights is out (there are two bulbs for this)
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In reply to a message from XJ40-MARK sent Fri 17 Jul 2009:
The BFMs are looking at all the bulbs on a side and the high-
mounted brake light in the rear window and the rear fog lamps as
well. The left side BFM monitors the high brake lamp and the left
side number plate lamp as well.
Even if the lamps aren’t actually lit, the BFMs are monitoring the
filaments. Do you have front fog lamps fitted? If not, the plug
should have a resistor across the leads to make the BFM happy.–
The original message included these comments:
when I m driving and the need arises to indicate left, the
repeater/indicater on the dash is flashing fast, as though a bulb
were out.
however, if I get out the car and check, the front/rear/side
indicators are not only working correctly, but at the correct
speed!!
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In reply to a message from Bryan N sent Fri 17 Jul 2009:
hi guys, appreciate your time, thanks.
i found bryans link interesting regarding the water ingress into
the side repeater.
i m not sure if this helps you guys, but ironically, its this
repeater that has the bottom corner of the lense broken off, so if
water is getting in there, this could cause the problem!
i did look at removing it and doing a make shift repair for a
while till I sourced a replacement, but noticed that the screws
holding them on had been rounded off . so, i ll wait till a
replacement is at hand.
as per my original question, everything is working fine visually,
outside the car, but the dash indicator is flashing fast!
just as a general conversation piece, I have to say that since i ve
had the car, i ve found it very enjoyable and surprisingly pretty
straight forward to work on!
however, I don t doubt for one minute that there will be aspects of
the car which will not be so easy !!!
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In reply to a message from Jaguarpete sent Fri 17 Jul 2009:
hi pete.
i dont have front fogs or the high level brake light!
can you humour me as well please, whats a BFM?
MARK.–
The original message included these comments:
The BFMs are looking at all the bulbs on a side and the high-
mounted brake light in the rear window and the rear fog lamps as
well. The left side BFM monitors the high brake lamp and the left
side number plate lamp as well.
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In reply to a message from XJ40-MARK sent Fri 17 Jul 2009:
Mark,
The problem with your indicators is not the BFM.
The unit which controls the indicator flash rate is the CPU.
It is so designed that, unlike the old ‘hot wire’ flash
units which flashed the remaining external lamps at double
speed if one bulb was out, when one of the bulbs is out or
that bulbs circuit is high resistance (as in the case of a
corroded bulb socket / ground) the dash indicator repeater
will flash at double speed BUT the external indicator lamps
themselves will continue to flash at the normal speed.
My guess is that one of your external side indicator
repeater lamps in the wing, even if it doesn’t have a blown
bulb does in fact have a high resistance to ground due to
corrosion in the bulb socket. That is exactly what happened
to the indicators on my car and I even had a situation where
the BFM detected that high resistance and flagged up a bulb
fail indication on the dash BUT all of the external
indicator lamps were still working OK although the dash
repeater was flashing at double speed.
Drove me nuts trying to find that one! :-)–
The original message included these comments:
so would it likely be a module problem or water getting in the side
repeater?
or both?
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In reply to a message from XJ40-MARK sent Fri 17 Jul 2009:
Mark,
Which type of indicator side repeater do you have on your
'90 car? Is it the long rectangular one or the square cube
shaped one as shown in my picture:-
They are not held on by screws. The black plastic back plate
has prongs which are a push fit in the hole in the wing and
need to be pressed inwards front and rear to release the
lamp unit from the wing. The new lamp unit when fitted also
has an adhesive backing which seals the unit to the wing, so
that seal must be gently broken to get the unit off the wing.
I found that the best way of doing that was to stick gaffer
(duct) tape to the wing all around the edges of the lamp
body to protect the paintwork and then slide a blunt knife
blade all the way round behind the lamp body and then apply
pressure with the blade from either end to press against the
retaining prongs to release it from the hole.
If you remove the lamp from the wing, once you have
unplugged the connector which sits in the rear corner of the
engine bay (behind the battery probably on the left side of
your RHD car) make sure that you tie a piece of string (or
similar) to the connector end of the flying lead before
you pull it out through the wing. You will need to tie that
piece of string to the flying lead of the replacement lamp ( outboard of the rubber grommet) to feed it back through
the wing to cross the void between the inner and outer wing
panels.–
The original message included these comments:
I did look at removing it and doing a make shift repair for a
while till I sourced a replacement, but noticed that the screws
holding them on had been rounded off . so, I ll wait till a
replacement is at hand.
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i suspect your correct on the grounding issue. as I said, the
repeater works perfect but as I thought it was screws holding the
lense on, I would nt attempt to inspect it as it looked like the
heads were rounded off. i m wondering why they are there and in
fact rounded of if they have no purpose!!!
i thank everyone for their help. your very kind ands it nice to
know there are still helpful people around.
as I get to know the car better, maybe one day I will return the
favour!!
thanks guys and god bless.
enjoy the weekend and enjoy your cars.
regards, mark.–
The original message included these comments:
Which type of indicator side repeater do you have on your
'90 car? Is it the long rectangular one or the square cube
shaped one as shown in my picture:-
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
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