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Fuel door switch not working

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  • DaviesDavies
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    Post count: 124
    #12661 |

    It seems fairly common for the only way to open the fuel door is with the mechanical release on the b-pillar. I have three 780s and none of them have a working button on the dash.  (Actually my 1991 will work about 20% of the time.)  Any idea of the source problem? It seems to be electrical as after several attempts the latch mechanism will click.  Any ideas how to repair?

    Andrea81Andrea Salata
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    Post count: 2

    Mine is not working either, at some point i tought it never worked..

    DaviesDavies
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    Post count: 124

    Mine worked back in 1995 when I got the car and gradually stopped working. Anyone had experience with this repair?

    GuillaumeC Guillaume
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    Post count: 51

    It works perfectly on my two 780.
    I think your problem can be repair easily:
    – It’s a mechanical problem? The linkage is good?
    – It’s an electrical problem? Try to solve it with a multimeter.

    Here is the schema:

    Please use a multimeter to check where the electricity arrives:
    – The ignition switch must be on position 2
    – Is there 12 volts between the ground and the motor?
    – If no: is there 12 volts between the ground and the switch?
    – If no: is there 12 volts between the ground and the relay?
    – If no: does the fuses 12 and 14 are ok?

    DaviesDavies
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    Post count: 124

    That is good to know. I’ll go through the steps and see what is going on.  What is odd is that it isn’t consistent so I’m thinking it must be a bad connection at some point. Thanks for posting the steps

    Christophermercon@gmail.comChristopher Mercon
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    Post count: 21

    It has been my experience that the electrical portions of the release are working. Its the solenoid that actually opens the door that is not. I took mine our cleaned it up and put it back in and it has been working ever since.

    Christophermercon@gmail.comChristopher Mercon
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    Post count: 21
    DaviesDavies
    Participant
    Post count: 124

    Thanks  Chris. Good idea I’ll pull the unit and make sure the mechanics are working with the solenoid in addition to confirming the electrical connections

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