After taking apart my dash to get out my trip computer. I
learned quite a few things. First, the bulbs in mine can be
removed by twisting 1/4 turn counterclockwise. I have no
idea where on might find replacements. I then modified the
bulb sockets to take LEDs and a 470 ohm resistor. I tested
it on my workbench with great success. I plugged the
connector back in, reconnected the battery, turned on the
headlights but no light. So nothing like testing for power
before I went through the trouble of replacing the
bulbs…duhhh!
So I need help as to why the power is not getting to the
trip computers back lights. The back lights on either side
behind the buttons work fine. Help!–
Jeff Schultz -1992 XJS 5.3L V12 -1995 X300 4.0L
Rutland VT, United States
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In reply to a message from gcoder1 sent Wed 21 Sep 2011:
Might be the polarity. LEDs only work in one way.
You need a NEO5 light bulb. I got mine from superbrightleds.com and I’ve been happy. (I ordered a NEO5
Cool White. Don’t buy the high power led, it’s too bright)
It will change the color from that aqua green to a Casio
Indiglo blue.
I offset that by cutting a piece of theater light gel
(Saffron) and it corrected the light color.–
1996 XJS 2+2 Convertible with 4.0L AJ16
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In reply to a message from Veekay sent Wed 21 Sep 2011:
Thanks for the info!
I ordered a few extras because they were so cheap.
I am aware of the polarity issue which is why I started
checking for power there. Nothing like assuming!
That still doesn’t help with the lack of power to the back
light for the display. I tried following the paths on the
circuit board. There must be a failed component on the board
as there is no obvious solder issues. I am considering
running a pair of wires from the other LEDs that provide the
back light to the switches. Any thoughts on that?–
The original message included these comments:
Might be the polarity. LEDs only work in one way.
You need a NEO5 light bulb. I got mine from superbrightleds.com and I’ve been happy. (I ordered a NEO5
Cool White. Don’t buy the high power led, it’s too bright)
In reply to a message from gcoder1 sent Thu 22 Sep 2011:
I am assuming that you have the trip computer with the buttons
on the side of the trip computer, not on the bottom? DAC7362?
I would wait to see what these new bulbs do. No reason to
start mucking around if these bulbs fit and work with no
mods…–
1996 XJS 2+2 Convertible with 4.0L AJ16
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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In reply to a message from Veekay sent Thu 22 Sep 2011:
Thanks Veekay,
You are correct on the model of the trip computer. I all
ready have been able to determine that the power to these
back lights is not making it to this board. I have been
testing with a meter and I believe I start having problems
when I reach an IC. Its possible that has failed. All of the
functions work except these back lights. Very frustrating!
Perhaps it is time to put it back and just keep a little
flashlight handy for viewing until I can replace it.–
The original message included these comments:
I am assuming that you have the trip computer with the buttons
on the side of the trip computer, not on the bottom? DAC7362?
I would wait to see what these new bulbs do. No reason to
start mucking around if these bulbs fit and work with no