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[Faisca_40]

hello all, as i said in my presentation i have a 1998 omega b 2.5td, and i have 2 problems with it. I've bought it a week ago with 250k kms(+/- 155k miles).
 -first is the cruise control that does not work, e have the stalk, and the throttle is electronic. but i can't make it work. the previous owner told it came from factory with it.
 -the second problem is the courtesy light that does not work when opening the door or with the lights switch. I've changed the bulb but nothing. the curb light works fine.
i apologize in advance for my bad English.
thank you all for the reply's. 

[Doctor Gollum]

The cruise control...

1. Is the car manual or automatic?
2. Do the brake lights work? If not possibly the brake switch.
3. If manual, is the clutch switch working?

Otherwise, Fuse 15 is the fuse for cruise control, and there's also a dedicated relay for it on the TD cars, but I don't know where this is located. The TD cruise control stalk is wired differently to the non TD one.

For the interior lights...

1. Do the map reading lights work?
2. Do the interior lights work if you open a rear door? (Note that the rear lights can be switched open, on and off separately... read the manual to confirm the correct position). Replacing the contact switches might solve the issue, but remove the old ones first to ensure the correct type as there are variations.
3. Have you checked the bulbs?
4. If none of that locates the issue, then suspect the light switch itself... They should come on with the switch pulled out regardless of door position.

[Faisca_40]

The cruise control...

1. Is the car manual or automatic?
2. Do the brake lights work? If not possibly the brake switch.
3. If manual, is the clutch switch working?

Otherwise, Fuse 15 is the fuse for cruise control, and there's also a dedicated relay for it on the TD cars, but I don't know where this is located. The TD cruise control stalk is wired differently to the non TD one.

For the interior lights...

1. Do the map reading lights work?
2. Do the interior lights work if you open a rear door? (Note that the rear lights can be switched open, on and off separately... read the manual to confirm the correct position). Replacing the contact switches might solve the issue, but remove the old ones first to ensure the correct type as there are variations.
3. Have you checked the bulbs?
4. If none of that locates the issue, then suspect the light switch itself... They should come on with the switch pulled out regardless of door position.

The cruise control...

1. Is the car manual or automatic?
 -manual
2. Do the brake lights work? If not possibly the brake switch.
 - they work fine
3. If manual, is the clutch switch working?
 - need to check that

Otherwise, Fuse 15 is the fuse for cruise control, and there's also a dedicated relay for it on the TD cars, but I don't know where this is located. The TD cruise control stalk is wired differently to the non TD one.
 - can you give me part number for me to check if i have the correct one?

For the interior lights...

1. Do the map reading lights work?
 - yes, they work fine
2. Do the interior lights work if you open a rear door? (Note that the rear lights can be switched open, on and off separately... read the manual to confirm the correct position). Replacing the contact switches might solve the issue, but remove the old ones first to ensure the correct type as there are variations.
 - the rear door lights work fine. but do not come on with the light switch(the one from the headlights)
3. Have you checked the bulbs?
 - i've replaced the old one for a new one
4. If none of that locates the issue, then suspect the light switch itself... They should come on with the switch pulled out regardless of door position.
 -they do not work with the light switch also

[TheBoy]

The BMW engined 2.5TD engine needs a unique stalk, it has a 2 pin connector. All other Omegas have a 4 pin connector.  Ensure you have right stalk.

No programming is needed on that engine for cruise, its enabled by default, just needs the right stalk and switches.

[Doctor Gollum]

Ok

For the cruise:

Test the clutch switch for function and the fuse and report back.

For the lights:

Rears might be because of the switch position, but it sounds like the main light switch is at fault.

[Faisca_40]

Small update. And I forgot to tell in main post.
So I was wondering why the previous owner applied a aftermarket central locking to this car, curious as I am I removed the right hand trim and found out that the original central locking module was missing. So I have an module from an Opel astra G from 2001 with the same plugs. I connected it. But nothing happens. The key fob led blinks but no response from the module(maybe is not the same, or not compatible). The question is, is the missing module anything to do with me problems?

[Doctor Gollum]

Actually it might...

Normally, when you unlock the car, it turns the interior lights on for a fixed time or until a door is opened and the door switch over rides the locking ECU.

The flash of light on the key only tells you that the key is trying to do something.

It should be possible using Tech 2 to reconnect the keys to the module.

You might also find O P C O M will work, but you run the very real risk of turning the car into a paperweight.

[Faisca_40]

Actually it might...

Normally, when you unlock the car, it turns the interior lights on for a fixed time or until a door is opened and the door switch over rides the locking ECU.

The flash of light on the key only tells you that the key is trying to do something.

It should be possible using Tech 2 to reconnect the keys to the module.

You might also find O P C O M will work, but you run the very real risk of turning the car into a paperweight.

I have the "My Naff Code Reader". But only use it to see and erase error codes. I don't have the know how to do that. And I don't know anyone here with the tech 2.
What if I buy another module? Will it be plug and play?
The module I have from the astra has the letters CL. And I saw somewhere that the omega is MU letters.

[Doctor Gollum]

https://www.ebay.co.uk/itm/196546920985

This might be helpful... Engine ECU, transponder ring, keys and Central Locking ECU.

It should all be plug and play, but double check with the seller that it's from a like for like vehicle to yours. Also if you can get the Car Pass card for the donor vehicle then you can use it to get the remote keys working.

[Doctor Gollum]

Technically, the cluster and stalks aren't required from an immobiliser point of view, but in your case the stalks might be handy for the cruise control aspect  I also note that there's no door lock cylinder.

Also, think out loud, and if anyone knows better... Would resyncing the key buttons work for programming the remote ECU? In the way one might after replacing the fob batteries as per the hand book

[TheBoy]

Also, think out loud, and if anyone knows better... Would resyncing the key buttons work for programming the remote ECU? In the way one might after replacing the fob batteries as per the hand book

That only resyncs the already programmed keyfob, not programs in a new one.  In essence, that procedure relearns where the key is in its rolling code.

[Doctor Gollum]

Also, think out loud, and if anyone knows better... Would resyncing the key buttons work for programming the remote ECU? In the way one might after replacing the fob batteries as per the hand book

That only resyncs the already programmed keyfob, not programs in a new one.  In essence, that procedure relearns where the key is in its rolling code.

That makes sense. So if the Astra unit has been correctly programmed to the car, then it might work, but if it hasn't then a different approach will be required...

[Faisca_40]

so, I'm talking to a friend of mine that as an omega V6 caravan, even if i can get the central locking module and remote from im, I'm still fuc... because of the immobilizer. right?

[Doctor Gollum]

so, I'm talking to a friend of mine that as an omega V6 caravan, even if i can get the central locking module and remote from im, I'm still fuc... because of the immobilizer. right?

No, they should work as long as the car are the same age, ie both '98.

You simply swap the remote fobs. Just make sure that the transponder chip remains in your key... This chip is the immobiliser part

[Faisca_40]

so, I'm talking to a friend of mine that as an omega V6 caravan, even if i can get the central locking module and remote from im, I'm still fuc... because of the immobilizer. right?

No, they should work as long as the car are the same age, ie both '98.

You simply swap the remote fobs. Just make sure that the transponder chip remains in your key... This chip is the immobiliser part

Ok. Thank you.
Friday  I will go se if the car is from the same year. I think it is.
I'm really sorry for all these questions, but I've allways loved this cars. And this one was cheap(at least in here) around 1000€(around 830£). It is in running orde. So I'm really forward to put it basically in factory setting. Apart from the exterior(it has a body kit, I think is a steinmetz replica, it's just a front and rear bumper lips and side skirts) and probably an 16" wheels( it as 15").