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2004 Opel Astra 1,7 TDI has airbag lamp with dim (weak)

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light. Lamp only turns...
2004 Opel Astra 1,7 TDI has airbag lamp with dim (weak) light. Lamp only turns off when pushing switch for fog light. Fog light (back) is not working at all. It also seams like seat heater is not working. Checked al fuses in front and back of car, they all seems OK. A guy with PC helped me to get error codes from computer:
B0670 (air bag issue)
B1375
B1273
Tried to disconnect airbag main unit - did not help, still weak airbag lamp while disconnected.
Opened CIM module (behind steering wheel) to check for faulty contacts - did not help.
Disconnected light switch module for fog light - did not help.
Checked tail lamps and contacts - looks just fine and no dirt or corrosion.
On electric panel on left side in back of the car: disconnected the lower left side connector with blue locking - airbag lamp ok. (connector for a cable from front of car)Can this information point out what is the cause to the problems and error codes?
Submitted: 7 months ago.Category: UK Car
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Answered in 11 hours by:
11/29/2017
UK Auto Mechanic: Peter Zavarelli,
 replied 7 months ago
Peter Zavarelli
Category: UK Car
Satisfied Customers: 32,942
Experience: Technical Consultant at Just Answer
Verified

My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

From what you have described here this sounds like a poor ground issue.If there is a poor ground feed signal leading from the engine or body or the battery itself this will cause this issue here.Usually, dim lights and electrical faults like this here are due to grounding issues.This will have to be checked into further to locate the poor ground contact.You might follow the cable/connector and see if you see any corroded or damaged wiring or any grounding issues.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

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