Interior lights...
02-15-2016, 10:39 PM
#1
Pro
Thread Starter
Interior lights...
So, my interior lights on my '95 993 will only come on if the door is unlocked with the key or when the frunk is open. But, not when I just open the door. Any thoughts on what may cause this? I've been told it "could" be the alarm module. But, that's an expensive part to guess on and woul like some further confirmation or thoughts.
02-16-2016, 01:47 AM
#3
Three Wheelin'
02-16-2016, 07:18 AM
#4
Pro
Thread Starter
I did check the door switches. The switches on either side whether in or out don't change the status of the interior lights....
i.e.
Trunk open/doors closed = interior lights on
Trunk open/doors open = interior lights on
Trunk closed/doors closed = interior lights off
Trunk closed/doors open = interior lights off
Unlock the doors with the key interior lights go on for a limited time (seems like it's about 30 seconds) regardless if the doors are open or closed.
i.e.
Trunk open/doors closed = interior lights on
Trunk open/doors open = interior lights on
Trunk closed/doors closed = interior lights off
Trunk closed/doors open = interior lights off
Unlock the doors with the key interior lights go on for a limited time (seems like it's about 30 seconds) regardless if the doors are open or closed.
02-16-2016, 07:29 AM
#5
Drifting
02-16-2016, 02:56 PM
#6
Rennlist Member
TJsBeer, from your description it doesn't sound like there is anything wrong with your car.
There is a section in the factory repair manual called Time-delay circuit of the interior lights. In that section it says,
"The interior lights are no longer controlled directly via the door contacts. The interior lights are switched on:
1. By unlocking the doors.
2. By locking the doors.
The lights continue to be lit for approx. 20 seconds.
The interior lights are switched off (doors closed):
1. When the ignition switch is turned on.
2. When the door is locked."
The front luggage compartment light is controlled with the "inside lights" by the alarm system control unit. It would make sense that the front trunk latch switch would turn on the "inside lights" too.
I posted a partial schematic sketch in this thread.
There is a section in the factory repair manual called Time-delay circuit of the interior lights. In that section it says,
"The interior lights are no longer controlled directly via the door contacts. The interior lights are switched on:
1. By unlocking the doors.
2. By locking the doors.
The lights continue to be lit for approx. 20 seconds.
The interior lights are switched off (doors closed):
1. When the ignition switch is turned on.
2. When the door is locked."
The front luggage compartment light is controlled with the "inside lights" by the alarm system control unit. It would make sense that the front trunk latch switch would turn on the "inside lights" too.
I posted a partial schematic sketch in this thread.
Last edited by hoggel; 02-16-2016 at 03:19 PM.
02-16-2016, 06:12 PM
#7
Pro
Thread Starter
Ha! When in doubt I should have just read the manual.
Seems strange though that the lights wouldn't come on when I open the door, but just when I unlock it... quirky little cars we have.
Thanks for the insight.
Cheers.
Seems strange though that the lights wouldn't come on when I open the door, but just when I unlock it... quirky little cars we have.
Thanks for the insight.
Cheers.
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02-16-2016, 08:34 PM
#8
My 95 interior lights come on when I open the door. You know the lights are 3 position rockers, right? I have one switch (passenger side) that is a little flaky and occasionally does not work. Take one out, clean and reinstall and see if it still acts the same. Also on my 95, if I use the key in the door all the hounds of hell are unleashed and Valkyries descend from the sky.
02-17-2016, 01:51 AM
#10
Rennlist Member
TJsBeer, from your description it doesn't sound like there is anything wrong with your car.
There is a section in the factory repair manual called Time-delay circuit of the interior lights. In that section it says,
"The interior lights are no longer controlled directly via the door contacts. The interior lights are switched on:
1. By unlocking the doors.
2. By locking the doors.
The lights continue to be lit for approx. 20 seconds.
The interior lights are switched off (doors closed):
1. When the ignition switch is turned on.
2. When the door is locked."
The front luggage compartment light is controlled with the "inside lights" by the alarm system control unit. It would make sense that the front trunk latch switch would turn on the "inside lights" too.
I posted a partial schematic sketch in this thread.
There is a section in the factory repair manual called Time-delay circuit of the interior lights. In that section it says,
"The interior lights are no longer controlled directly via the door contacts. The interior lights are switched on:
1. By unlocking the doors.
2. By locking the doors.
The lights continue to be lit for approx. 20 seconds.
The interior lights are switched off (doors closed):
1. When the ignition switch is turned on.
2. When the door is locked."
The front luggage compartment light is controlled with the "inside lights" by the alarm system control unit. It would make sense that the front trunk latch switch would turn on the "inside lights" too.
I posted a partial schematic sketch in this thread.
it would be unlikely that both door switches have gone bad, so test both doors. if both do not turn on the light, then you ought to check the wiring on the alarm control module, specifically the door switch ground at connector II, pin 21. with fob and delay timeout relay apparently working, then it isn't likely going to be your acm at fault, fortunately.
if only one door works properly, then it is the door switch that's gone bad, pretty cheap to replace.
please let us know what you find.
02-17-2016, 11:59 AM
#12
Pro
Thread Starter
02-17-2016, 12:04 PM
#13
Pro
Thread Starter
I just went through some interior lights issues with hoggel's help! but indeed the door switch should turn on the lights with opening, as that's what my 993 does now, and others above note too.
it would be unlikely that both door switches have gone bad, so test both doors. if both do not turn on the light, then you ought to check the wiring on the alarm control module, specifically the door switch ground at connector II, pin 21. with fob and delay timeout relay apparently working, then it isn't likely going to be your acm at fault, fortunately.
if only one door works properly, then it is the door switch that's gone bad, pretty cheap to replace.
please let us know what you find.
it would be unlikely that both door switches have gone bad, so test both doors. if both do not turn on the light, then you ought to check the wiring on the alarm control module, specifically the door switch ground at connector II, pin 21. with fob and delay timeout relay apparently working, then it isn't likely going to be your acm at fault, fortunately.
if only one door works properly, then it is the door switch that's gone bad, pretty cheap to replace.
please let us know what you find.
It's the only thing not working on the car, so it's kind of bothersome when all else is perfect.
But, eletrical is not my forte, so I'll be living with it for now.
Thanks for all the help guys.
Cheers,
TJsBeer
02-17-2016, 12:47 PM
#14
Tested both door switches this morning. Neither seems to do effect anything either on or off no matter what position the lights themselves are in.
It's the only thing not working on the car, so it's kind of bothersome when all else is perfect.
But, eletrical is not my forte, so I'll be living with it for now.
Thanks for all the help guys.
Cheers,
TJsBeer
It's the only thing not working on the car, so it's kind of bothersome when all else is perfect.
But, eletrical is not my forte, so I'll be living with it for now.
Thanks for all the help guys.
Cheers,
TJsBeer
http://www.lamboweb.com/Repairs_Sect...t_Switches.htm
Fixed mine when I had an issue once.
