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Thread: 740i radio help

  1. #1
    Join Date
    Nov 2014
    Location
    Nevada
    Posts
    109
    My Cars
    89 750iL 6 Speed

    740i radio help -solved

    Hello, after multiple years of not having a radio in my car I decided to purchase a oem radio and amp. I plugged in the amp, put the oem radio in and it worked perfectly... for about 20 minutes. It cut out a few times and now It won’t make any noise at all. I had an extra used oem amp that I plugged in to see if it made a difference and it still did nothing. I checked the antenna on the drivers side C-pillar and nothing seemed visually wrong. Any ideas on what to check and how to get the radio to work? Thanks
    Last edited by Jormotors; 12-03-2017 at 02:41 PM.

  2. #2
    Join Date
    Mar 2013
    Location
    Green Bay, WI
    Posts
    1,332
    My Cars
    1992 750il / 1991 560 SE
    Check fuses?
    ______________________________
    1992 750iL

  3. #3
    Join Date
    Nov 2014
    Location
    Nevada
    Posts
    109
    My Cars
    89 750iL 6 Speed
    Quote Originally Posted by unity View Post
    Check fuses?
    Good idea, I’ll try that, would the fuses be under the hood with the rest or is there a separate area for these fuses?

  4. #4
    Join Date
    Oct 2007
    Location
    Boca Raton, Florida
    Posts
    1,558
    My Cars
    89'750iL,98'740iL,00'M5
    1 fuse under the hood in fuse box, 1 on the back of the headunit, and 1 on the amp. Check both amps you used to see if its good

    BMW 7er Website www.7er.com
    1989 BMW 735i Schwarz (sadly, sold) // 1989 BMW 750iL Cirrusblau Metallic // 1998 BMW 740iL Oxfordgrün Metallic // 2000 M5 Carbon Schwarz ///

  5. #5
    Join Date
    Nov 2014
    Location
    Nevada
    Posts
    109
    My Cars
    89 750iL 6 Speed
    So I checked fuses and everything was good, I used a volt meter to test the plug to the amp and the White wire which I believe should have voltage with ignition on had no power. I followed the wire and found that a mouse had chewed through it. Fixed it and radio works great, thanks for all the help.

  6. #6
    Join Date
    Mar 2013
    Location
    Green Bay, WI
    Posts
    1,332
    My Cars
    1992 750il / 1991 560 SE
    Glad to gear! Now if only I can get the radio to work on my other vehicle.
    ______________________________
    1992 750iL

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