Interior light relay
Thread Starter
Pro
Joined: May 2011
Posts: 638
Likes: 23
From: Edinburgh, Scotland
Interior light relay
Does anyone know if the interior light relay XXI (89 S4) provides the control for the time delay ?
I have an odd acting drivers door light issue and wanted to look at the relay/s
The drivers door light when switched to the position to come on when the door opens does not come on. Instead all the other lights work and when the door is closed the and the time delay switches the lights off the drivers door light switches on.
There is a very small voltage to the live wire when the door is open so I was suspecting the time delay relay.
I have an odd acting drivers door light issue and wanted to look at the relay/s
The drivers door light when switched to the position to come on when the door opens does not come on. Instead all the other lights work and when the door is closed the and the time delay switches the lights off the drivers door light switches on.
There is a very small voltage to the live wire when the door is open so I was suspecting the time delay relay.
Rennlist Member
Joined: Mar 2002
Posts: 6,114
Likes: 344
From: Texas
Electron Wrangler
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Mar 2002
Posts: 13,657
Likes: 616
From: Phoenix AZ
The relay can't make this happen - all lights would always do the same thing (in the same mode) if it's wired correctly .
That fixture is probably wired incorrectly - take it out and make sure that:
The Red wire connects to the bulb directly, Brown & Brown/white both connect to the switch part
Alan
That fixture is probably wired incorrectly - take it out and make sure that:
The Red wire connects to the bulb directly, Brown & Brown/white both connect to the switch part
Alan
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,044
From: Boulder Creek, CA
I have a weird int light issue.
They're aways on, except when I turn them off manually at the light.
The door posts appear to work, the chimes come on and go off as expected with each door.
They're aways on, except when I turn them off manually at the light.
The door posts appear to work, the chimes come on and go off as expected with each door.
Electron Wrangler
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Mar 2002
Posts: 13,657
Likes: 616
From: Phoenix AZ
Not weird at all - a common fail condition.
Most common reason for this is also wrongly wired light fixtures (in the roof or hatch).
The fixtures there ground by connection to the body panels as well as a (Brown wire) direct ground connection (for always on mode) to the fixture frame (+ indirectly to the switch). There is also a (Brown/White wire) switched ground connection only to the switch (for door switched mode).
If you connect any one of these fixtures with the brown/white wire plugged to the fixture frame connection it will short the whole circuit to ground when the fixture is installed (but will work OK when that fixture is left dangling). Many many people have done this ... check for this first.
Without your other features working from the door switches it could also have been either door pin switch always connecting to ground.
However it could still be the hatch pin switch always connecting to ground, your relay being shot or a short to ground on the brown/white wire somewhere else.
For generic troubleshooting - pull the relay, if the lights go out the the wiring from the relay is OK. If not: pull the hatch switch connection - this is the most likely to fail this way - under the hatch receiver. This last is one still a possibility for your symptoms.
If neither - test the pin "T" in the relay socket: if this has continuity to ground you have problem with a door pin switch (or their wiring).
In your case I'd first pull out the roof/hatch lights one by one and see if they start working correctly when just dangling...
Alan
Most common reason for this is also wrongly wired light fixtures (in the roof or hatch).
The fixtures there ground by connection to the body panels as well as a (Brown wire) direct ground connection (for always on mode) to the fixture frame (+ indirectly to the switch). There is also a (Brown/White wire) switched ground connection only to the switch (for door switched mode).
If you connect any one of these fixtures with the brown/white wire plugged to the fixture frame connection it will short the whole circuit to ground when the fixture is installed (but will work OK when that fixture is left dangling). Many many people have done this ... check for this first.
Without your other features working from the door switches it could also have been either door pin switch always connecting to ground.
However it could still be the hatch pin switch always connecting to ground, your relay being shot or a short to ground on the brown/white wire somewhere else.
For generic troubleshooting - pull the relay, if the lights go out the the wiring from the relay is OK. If not: pull the hatch switch connection - this is the most likely to fail this way - under the hatch receiver. This last is one still a possibility for your symptoms.
If neither - test the pin "T" in the relay socket: if this has continuity to ground you have problem with a door pin switch (or their wiring).
In your case I'd first pull out the roof/hatch lights one by one and see if they start working correctly when just dangling...
Alan