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Rear Defrost

Discussion in '308/328' started by chalf87328, Nov 7, 2009.

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  1. chalf87328

    chalf87328 Rookie

    Jun 15, 2009
    36
    Houston
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    chalf87328
    #1 chalf87328, Nov 7, 2009
    You guys were able to help me solve one electrical problem, now I have another! I have everything working except the rear defrost (which I will never use in Texas, but still want it working). I'm not certain if it's not working, or if the indicator light on the dash is just out. In any event, I cannot see any fuse or relay labeled rear defrost/demist.

    I did just re-calibrate the LED lights for the heater indicators, so maybe I knocked something loose while in the console, but before I tear into it, I thought I would check to see if there were any ideas.

    Thanks
     
  2. chalf87328

    chalf87328 Rookie

    Jun 15, 2009
    36
    Houston
    Full Name:
    chalf87328
    #2 chalf87328, Nov 7, 2009
    I went ahead and took the rocker switch out, disconnected it, cleaned both sides of the connections and put it back together with no luck.

    BTW, I have a 1987 328.
     
  3. irondogmike

    irondogmike F1 Rookie

    Sep 8, 2006
    2,532
    San Diego area
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    Michael Tucker
    #3 irondogmike, Nov 7, 2009
    could be the bulb in the dash,if you do take the dash out and brake those little black inserts,I have plenty to help you out and check the wires on the window,use a volt meter to see if theres a current there,and there is a fuse,I'll check to see which one,I'll get back to you
     
  4. Paul_308

    Paul_308 Formula 3

    Mar 12, 2004
    2,345
    #4 Paul_308, Nov 7, 2009
    Last edited by a moderator: Sep 7, 2017
    The rear window heater shares a fuse with the RH window motors. Number 19 counting to left to right. 20A

    If you have the 1989 328 Wiring Diagrams (34 pages) check Figure 7 (which is on 2 pages - pdf p 26-27). The window heater is at the very bottom of the page, balloon 152. (page2) Orange wire to connector 135, to connector 130 (page1)

    Below is excised portion described above.
    Image Unavailable, Please Login
     
  5. chalf87328

    chalf87328 Rookie

    Jun 15, 2009
    36
    Houston
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    chalf87328
    #5 chalf87328, Nov 7, 2009
    Thanks Paul and Mike, you helped me solve this. The fuses were fine, but neither window would work either (I hadn't even tried them in a while), so I checked the window lift relay and it was bad. When I switched the relay with another I knew was good, both the windows and the rear defrost work just fine.

    Hopefully, this solves my last electrical item! Appreciate the help.
     
  6. irondogmike

    irondogmike F1 Rookie

    Sep 8, 2006
    2,532
    San Diego area
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    Michael Tucker
    #6 irondogmike, Nov 8, 2009
    great,isn't it fun when your able to work on your own ferrari and get it to work,I know it was for me
     
  7. chalf87328

    chalf87328 Rookie

    Jun 15, 2009
    36
    Houston
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    chalf87328
    #7 chalf87328, Nov 8, 2009
    Mike, you are so right. I'm very much a novice at this, but do enjoy when I can tackle something and get it right. You and the others on the forum are a great help. Thanks so much.
     
  8. irondogmike

    irondogmike F1 Rookie

    Sep 8, 2006
    2,532
    San Diego area
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    Michael Tucker
    #8 irondogmike, Nov 8, 2009
    most of us have been there and done that which helps,I've had a 1985 308qv for 2 years and can't wait to get another one someday.Its like having money in the bank.If you car is well sorted out and well documented you're not going to have a problem getting a good price back on your car.
     

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