[xk] Directional box problem

Seeking advice for rear light problem. The PO put in new
wiring and all connections check out. Just noticed that
right side tail light is much brighter than other side when
side lights and main lights are on. Signal lights and
brake lights both work fine on both sides when lights are
off. Problem is when the light switch is turned on, both
the brake light and tail light are on making the right side
bright. I have only driven the car in the day so have not
noticed this until now. I am thinking the problem is in
the direction unit in the engine compartment and that it is
stuck and not switching as it should on the part that
controls the rear right side lights. I’ve not taken the
box apart to look inside. Is there a simple fix for this
or should I just get a new directional unit? Thanks in
advance, Don–
Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911
Spring Hill. fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

Don,

The flasher relay only operates on the stop light circuit. The circuit to
the tail light is separate. If the right side tail light is much brighter
than the left with the lights on, chances are you have the bulb in upside
down. Although the locating pins on the bulb are offset the offset is quite
small and the bulb holders were never that great when new. It is really very
easy to get the bulb in the wrong way up so I suggest that before you do
anything else you take the cover off the right rear lamp, remove the bulb
and put it back the other way up. This may fix your problem.

Eric
Church Stretton, Shropshire, UK-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Etch
Sent: 16 August 2015 19:55
To: xk@jag-lovers.org
Subject: [xk] Directional box problem

Seeking advice for rear light problem. The PO put in new wiring and all
connections check out. Just noticed that right side tail light is much
brighter than other side when side lights and main lights are on. Signal
lights and brake lights both work fine on both sides when lights are off.
Problem is when the light switch is turned on, both the brake light and tail
light are on making the right side bright. I have only driven the car in the
day so have not noticed this until now. I am thinking the problem is in
the direction unit in the engine compartment and that it is stuck and not
switching as it should on the part that controls the rear right side lights.
I’ve not taken the box apart to look inside. Is there a simple fix for this
or should I just get a new directional unit? Thanks in advance, Don

Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911 Spring Hill. fl,
United States --Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

I had a similar symptom with the off side front sidelamp and it was
caused by someone connecting the wires to the wrong terminals in the
lamp housing.On 8/16/2015 4:58 PM, Eric Capron wrote:

Don,

The flasher relay only operates on the stop light circuit. The circuit to
the tail light is separate. If the right side tail light is much brighter
than the left with the lights on, chances are you have the bulb in upside
down. Although the locating pins on the bulb are offset the offset is quite
small and the bulb holders were never that great when new. It is really very
easy to get the bulb in the wrong way up so I suggest that before you do
anything else you take the cover off the right rear lamp, remove the bulb
and put it back the other way up. This may fix your problem.

Eric
Church Stretton, Shropshire, UK

-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Etch
Sent: 16 August 2015 19:55
To: xk@jag-lovers.org
Subject: [xk] Directional box problem

Seeking advice for rear light problem. The PO put in new wiring and all
connections check out. Just noticed that right side tail light is much
brighter than other side when side lights and main lights are on. Signal
lights and brake lights both work fine on both sides when lights are off.
Problem is when the light switch is turned on, both the brake light and tail
light are on making the right side bright. I have only driven the car in the
day so have not noticed this until now. I am thinking the problem is in
the direction unit in the engine compartment and that it is stuck and not
switching as it should on the part that controls the rear right side lights.
I’ve not taken the box apart to look inside. Is there a simple fix for this
or should I just get a new directional unit? Thanks in advance, Don

Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911 Spring Hill. fl,
United States --Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–


Bruce Cunningham
slainte mhath

In reply to a message from Eric Capron sent Sun 16 Aug 2015:

Eric-Bruce, thanks for the response. The wires to the rear
lights are in the correct place and the lamp is in the correct
position. I found that there is a high and low post on the lamp
sides and that it can only go in one way. I had my hopes up
that this was the problem and would be easy to fix. No such
luck. When the parking light and running light are turn on,
both filaments inside the bulb are glowing on the right side.
That is as if the lights on and the brakes are on, but only on
the right side. The left side works properly. With the lights
off, the brake light works correctly on both sides. So the
problem is the right side is getting a signal to have the brake
light come on the right side with the lights are turned on.
This is the problem that I am seeking to solve. Thanks again,
Don–
Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911
Spring Hill. fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

Don,

First of all does your car have only 1 double filament lamp on each side?
If so, with the running lights off, does the brake light and the
directional on the right side function properly?

If so,with the running light switched off look closely at the lamp when
someone applys the brakes, and see if both filaments light (with the
brake switch) as well as the do with the running light switch. Tell us
your findings.

I don’t think you need replace your “control box” at this point!

Regards,

Rick____________________________________________________________
Buffett’s New Enemy
Buffett just confirmed his worst fear. Click here for his warning.
http://thirdpartyoffers.juno.com/TGL3141/55d176bc5e52e76bc432fst02vuc

Don,

OK, so basically when you switch on the lights both filaments on the right
hand rear light up. I know you said the wiring was all good but it does
start to indicate a mis-wire somewhere.

With the indicator switch off the feed from the stop light switch goes via
the DB10 to the bright filament of the stop/tail via terminal 7 of the DB10.
When you operate the indicator switch the relay in the DB10 disconnects this
and feeds whatever comes from the flasher to this filament instead.
Therefore with the indicators off and the brake pedal not pressed there
should be no power going to the stop light via the DB10 or any other route.
A quick check would be to disconnect the wire on terminal 5 of the DB10
(that’s from the stop light switch) and see if that makes any difference. If
it doesn’t the supply from the flasher is on terminal 1. You could try
disconnecting that to see what happens. If neither of these affects the
fault I think the trouble is elsewhere and not the DB 10.

Eric-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Etch
Sent: 17 August 2015 02:26
To: xk@jag-lovers.org
Subject: RE: [xk] Directional box problem

In reply to a message from Eric Capron sent Sun 16 Aug 2015:

Eric-Bruce, thanks for the response. The wires to the rear lights are in
the correct place and the lamp is in the correct position. I found that
there is a high and low post on the lamp sides and that it can only go in
one way. I had my hopes up that this was the problem and would be easy to
fix. No such luck. When the parking light and running light are turn on,
both filaments inside the bulb are glowing on the right side.
That is as if the lights on and the brakes are on, but only on the right
side. The left side works properly. With the lights off, the brake light
works correctly on both sides. So the problem is the right side is getting
a signal to have the brake light come on the right side with the lights are
turned on.
This is the problem that I am seeking to solve. Thanks again, Don

Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911 Spring Hill. fl,
United States --Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

In reply to a message from Eric Capron sent Sun 16 Aug 2015:

Rick-Bruce, thanks for your time and for the suggestions. Just
pulled the two wires on the control box DB10 and it made no
difference. Then on the right tail light housing, I pulled the
black wire - the positive ground wire - and with the light
switch on the light was like it should be and matched the left
side with only one filament burning in each lamp. However,
when the brake pedal was pressed, the light on the right side
went out entirely. I am thinking the problem might be in the
wiring in the trunk area and so I will remove the panels and
check this out. I am still mystified how the brake and signal
lights work properly except when the parking lights and running
lights are turn on and then the right side has both filaments
burning without the brake being applied. There is an answer
somewhere and sooner or later it will be found. Thanks again,
Don–
Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911
Spring Hill. fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

Don,

The probable reason they seem to work with the running lights off is that
the brake/signal bulb filament is getting its ground (earth) connection
through the “unergised” 3 other running lamp filaments in parallel that
are grounded.

When you turn them on you, put battery where this pseudo ground was and
the once working right side went out as it had battery on both sides.
You do have a wire swap someplace!!! You can fix it at the socket
(colors won’t be correct, or you can pull the boot panels where there are
connectors for the short piece of the light harbness and another “set”
about a yard further up across the back!

Regards,

Rick
On Mon, 17 Aug 2015 18:47:52 -0700 “Etch” donetchison@gmail.com writes:> In reply to a message from Eric Capron sent Sun 16 Aug 2015:

Rick-Bruce, thanks for your time and for the suggestions. Just
pulled the two wires on the control box DB10 and it made no
difference. Then on the right tail light housing, I pulled the
black wire - the positive ground wire - and with the light
switch on the light was like it should be and matched the left
side with only one filament burning in each lamp. However,
when the brake pedal was pressed, the light on the right side
went out entirely. I am thinking the problem might be in the
wiring in the trunk area and so I will remove the panels and
check this out. I am still mystified how the brake and signal
lights work properly except when the parking lights and running
lights are turn on and then the right side has both filaments
burning without the brake being applied. There is an answer
somewhere and sooner or later it will be found. Thanks again,
Don

Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911
Spring Hill. fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at
http://www.jag-lovers.org/donate04.php


“Gut bugs” and your waist
How “gut bugs” can add up to 7 INCHES to your waist
http://thirdpartyoffers.juno.com/TGL3165/55d2a4102f5ec240f0995mp08vuc

In reply to a message from holland-rick@juno.com sent Tue 18 Aug 2015:

Rick, thanks so much for providing and answer to this mystery.
Nothing made sense to me, but what you said does. The PO did the
wiring on the car with a new harness. I had a little time this
evening to pull back the panels in the boot and found that some of
the wires have been spliced with non-original wires that are
different colors. (Perhaps the wires were short - I don’t know.)
So I’ll start testing the wires and get to the bottom of this. At
least now I am happy to know where to focus my attention and have
an explanation for what is happening so the problem can be fixed.
Thanks again for your time and effort. Best Regards,Don–
Etch, Etype S1 coupes, XK140 roadsters, Ariel Atom, 911
Spring Hill. fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php