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Originally Posted by johandk
Dear Sir,
I hope you would be able to help me.
I have a 88/89 BMW 735i, Chassis No.:02763772. What started happening is that whenever the vehicle is switched on and started the ding-dong starts going.
The following are then also dead on the dasboard: the petrol guage, the temp guage, the LED display where all the errors are displayed. The ref counter are however working. When I press the brake peddal the ding-dong would sometime quite down and it would seem that the LED display get brighter but it is still not displaying anything.
Sometimes when I ref the engine up to over 4000rpm the LED display and the other guages would start working.
Could you please tell me what is wrong to allow me to have this problem fixed.
This is my second 735i and it is a lovely vehicle but I don't want to spend thousands of rands running from one place to another while everybody tries to fix the problem.
Thanks in advance for your help
Johan de Klerk
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Hello Johan,
The problems you are describing might have two causes:
- A bad contact on the code plug. On the early models the plug is installed in the brown connector that goes into the instrument cluster. Try cleaning the contacts with electrical contact cleaner spray.
- Deffective caps in the dashboard. Have a look at
http://bmwe32.student.utwente.nl under "dash cluster caps". If you are uncomfortable soldering new caps just print the webpage and take the cluster with the page to a tv repairshop. They'll do it for a small fee.
Kind regards,
Johan