Page 1 of 3 123 LastLast
Results 1 to 25 of 53

Thread: pics of my melted fuse box (finally)

  1. #1
    Join Date
    Feb 2010
    Location
    Worcester, MA
    Posts
    101
    My Cars
    1995 BMW 525iA

    pics of my melted fuse box (finally)

    So my heater stopped working, and I found this a while back but i'm finally posting pics. one time while it was in this condition someone turned on the heater and it worked, meaning theres a short somewhere in my car. also there is some fuse broken and melted that was covered by rubber. someone please help me identify it.










    THaNKS

  2. #2
    Join Date
    Jan 2004
    Location
    Texas
    Posts
    3,639
    My Cars
    2002 330i, 1989 535i
    Hey, samesies!




  3. #3
    Join Date
    Nov 2008
    Location
    Eugene, Oregon
    Posts
    1,790
    My Cars
    e30, e34s, 89 Cherokee
    dear god, is there a way to prevent this or a reason it happens? is it only on the 525 and 535 or all e34's?

    I DO NOT ever want to see something like that in my car, thats horible...

    oh and that other fuse covered by rubber looks like an aftermarket fuse for like and amp or something, but I'm not sure.
    Last edited by darknezz7; 03-26-2010 at 07:01 PM.
    Slowly climbing the ladder. But never reach the top.
    Click Car 4 Build!

    '86 325eA-$200 e30 save, sell.
    '89 535is-5spd, Htd seat&A/C freeway MONSTER.

    '86 325es-Project:Black Dahlia Murder.
    '84 318is-5spd M20 RIP 2016.
    '94 530i
    -6 Spd swp, DUDMD chip, Intake.
    '89 535iA
    -Parted. 6 yrs later eng in new 535is
    '94 325iA-e36 bleh. HG, Suspension, Ect.
    94' 530iA-RIP 2004, engine in new 530i

    '89 Cherokee 4x4-Lots.
    '97 Eclipse Spyder-4g64/63 Hybrid Turbo.
    '78 530ia-first car RIP 2005

  4. #4
    Join Date
    Jan 2010
    Location
    Canada
    Posts
    389
    My Cars
    1992 535i
    Wow, I hope your not putting in a 30 amp fuse when it calls for a 15?
    What else could cause that?
    =(||)(||)=

  5. #5
    Join Date
    Mar 2006
    Location
    Denver, CO
    Posts
    2,004
    My Cars
    94+95 E34, '07 335i E92
    Wow on the exploded fuse!

    The other with rubber top and red wires looks like its for an aftermarket alarm or radar.

  6. #6
    Join Date
    Jan 2010
    Location
    Calgary, Canada
    Posts
    216
    My Cars
    a few
    sheesh, I wanna prevent that from happening.

  7. #7
    Join Date
    Nov 2006
    Location
    Portland, OR - USA
    Posts
    6,702
    My Cars
    e34, e39
    slot 19 says rear fogs on that panel. did someone tap into that circuit for something else?

    i have no idea what would cause that, the fuse should catch it. scary.
    No current BMWs.
    1994 Roadmaster Wagon
    1974 Alfa Romeo Berlina

  8. #8
    Join Date
    Jun 2007
    Location
    Great White North
    Posts
    11,285
    My Cars
    various
    Have seen this before. Not sure what causes it other than corrosion in the box. There is a thread somewhere with the process of replacing the entire box.. yikes. lots of wires

  9. #9
    Join Date
    Sep 2006
    Location
    NW suburban Chicago
    Posts
    13,478
    My Cars
    hiss by my window
    Bummer
    The fuse holder in your hand isn't factory equipment. Someone has been fooling around in there already.
    I have a fuse box you may have for beer and shipping. Plug the unburnt connectors from your old one into the "new" one and splice your wires to the others.
    Get the original problem sorted or you'll be doing it again and not likely to find a cheapo fue box.
    Last edited by ross1; 03-26-2010 at 09:42 PM.

    If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue

  10. #10
    Join Date
    Jan 2004
    Location
    Texas
    Posts
    3,639
    My Cars
    2002 330i, 1989 535i
    Quote Originally Posted by zubbie View Post
    Have seen this before. Not sure what causes it other than corrosion in the box. There is a thread somewhere with the process of replacing the entire box.. yikes. lots of wires
    Yep. Mine was exploded, and the replacement box Binjammin sent me had signs of corrosion on the same fuse. So this is just a warning for everyone to check for corrosion on your fuses, otherwise you could be dealing with this mess. I replaced my entire box. PITA.

  11. #11
    Join Date
    Feb 2010
    Location
    Worcester, MA
    Posts
    101
    My Cars
    1995 BMW 525iA
    I remember reading that extended electricity going to a broken heater blower motor can cause this. I didn't even know I had a car alarm...

    How much would putting a new fuse box in cost if I had my mechanic do it
    Last edited by eethirtyfour; 03-26-2010 at 09:56 PM. Reason: Automerged Doublepost

  12. #12
    Join Date
    Feb 2009
    Location
    Denver
    Posts
    90
    My Cars
    1990 525i
    Quote Originally Posted by Racerhoze View Post
    ...I replaced my entire box. PITA.
    Yikes! I'll go check mine right now. I would not want to do that.

  13. #13
    Join Date
    Jun 2007
    Location
    Butte, Montana
    Posts
    25,560
    My Cars
    Suck
    Quote Originally Posted by Racerhoze View Post
    Yep. Mine was exploded, and the replacement box Binjammin sent me had signs of corrosion on the same fuse. So this is just a warning for everyone to check for corrosion on your fuses, otherwise you could be dealing with this mess. I replaced my entire box. PITA.

    It did? Sorry man, I don't remember you ever saying anything.

    Go ahead and bite. Plenty for everyone.

  14. #14
    Join Date
    May 2007
    Location
    Long Island, New York
    Posts
    551
    My Cars
    E34 540i/6
    Looks like there's a few fuses we need to all check and run some sandpaper thru them. I know my recent rear defroster failed because of a cooked fuse. That's not even in the same area! Do they make a fuse with not only an amperage but a temperature sensor/rating as well? It looks like we need to replace or check all of ours.

    Ace

  15. #15
    Join Date
    Jan 2004
    Location
    Texas
    Posts
    3,639
    My Cars
    2002 330i, 1989 535i
    Quote Originally Posted by Binjammin View Post
    It did? Sorry man, I don't remember you ever saying anything.
    No worries! The replacement diy said it would be a good idea to sand down all contact surfaces anyway for good connections. It was just a bit of green corrosion, but I thought it was interesting that it was the same fuse that had catastrophically failed on mine.

    http://bmwe32.masscom.net/
    There is the diy I used, just click fuse box rebuild.

  16. #16
    Join Date
    Nov 2009
    Location
    Hudson Valley NY
    Posts
    709
    My Cars
    90535ia 09MuranoSL
    OMG that was hideous! Years ago I had a Saab Guru told me to cycle your fuses every year. Just taking them out and reseating them or new ones could (in his estimation) prevent surprise failures. Seems that doing this to sensors works too.

    If there is corrosion weakening the connection beyond your fuse (or before it in the circuit), good luck
    BMW CCA #434501
    [ 127k Miles | Dinan Engine & Trans chips | LSD | AFE Pro 5 R Air Filter | ANSA Exhaust | BavAuto Springs | Bilstein Sport shocks | | Racing Dynamics front strut brace | BavAuto DTM Lip | Driver-side wiper arm upgrade | Euro LKM ECE-B | French Market E1 Spec Hella Lows (HID 4500K 55w DDM Raptor v2) and Highs (Osram Nightbreaker +90)
    | HID Projector Fogs - 3000K 35w DDM Raptor v2 | LED Interior lights with Shogun's Dimmer kit | 7 Series Rear Map lights | Euro clear parking, tail and signal lamps]


  17. #17
    Join Date
    Jun 2007
    Location
    lots o' potholes
    Posts
    4,936
    My Cars
    '95 540i ,'02 pathfinder
    oh wow. i'm about to just go and buy brand new fuses for everything.
    95 540i beat around thingamajig
    02 pathfinder lifted

  18. #18
    Join Date
    Oct 2008
    Location
    Buffalo, NY
    Posts
    684
    My Cars
    S52E30/06 X3 3.0
    Quote Originally Posted by CleanE34 View Post
    oh wow. i'm about to just go and buy brand new fuses for everything.
    haha same here, now im just kinda scared.

  19. #19
    Join Date
    Jun 2009
    Location
    Texas
    Posts
    228
    My Cars
    1995 BMW 525i
    I had same fuse melt on me two, jumped to the neighbor and fried it too. I realized soon enough to file down connections and replace. Almost burnt a hole in the top of the box. Weird because the blower worked fine before/afterwards.

  20. #20
    Join Date
    Aug 2012
    Location
    Madison, WI
    Posts
    1,227
    My Cars
    1994 530i
    Wow. Thanks for the bump. I should go and replace a bunch of fuses as mine are all still the original ones. Ugh...just another thing to add onto the list.

  21. #21
    Join Date
    Sep 2006
    Location
    Los Gatos CA
    Posts
    4,125
    My Cars
    1987 325is, e34, Z3, e39
    Quote Originally Posted by SwissCheeseHead View Post
    Wow. Thanks for the bump. I should go and replace a bunch of fuses as mine are all still the original ones. Ugh...just another thing to add onto the list.
    Inspect the originals, but don't replace them if they are in good condition.

    Look at the picture above. One of the red 10A fuses adjacent to the burnt spot was replaced. It has a transparent plastic case. It's likely the failed one was a replacement as well.

    Many replacement fuses have much thinner blades. The thinner blades don't result in the same contact pressure, especially after the thicker factory fuse has been in the connector. The thinner metal also has higher resistance, and doesn't transfer heat away from hot spots as well.

    Further hints that the fuses are to blame is the burnt-out aftermarket fuse holder. That should never happen. The fuse element should safely blow well before the case melts. Once could be corrosion on the fuse holder. Twice points to defective fuses.

    Bottom line: check your fuses if you like, but replacing them could cause the very problem you are trying to avoid.

    - - - Updated - - -

    Quote Originally Posted by SwissCheeseHead View Post
    Wow. Thanks for the bump. I should go and replace a bunch of fuses as mine are all still the original ones. Ugh...just another thing to add onto the list.
    Inspect the originals, but don't replace them if they are in good condition.

    Look at the picture above. One of the red 10A fuses adjacent to the burnt spot was replaced. It has a transparent plastic case. It's likely the failed one was a replacement as well.

    Many replacement fuses have much thinner blades. The thinner blades don't result in the same contact pressure, especially after the thicker factory fuse has been in the connector. The thinner metal also has higher resistance, and doesn't transfer heat away from hot spots as well.

    Further hints that the fuses are to blame is the burnt-out aftermarket fuse holder. That should never happen. The fuse element should safely blow well before the case melts. Once could be corrosion on the fuse holder. Twice points to defective fuses.

    Bottom line: check your fuses if you like, but replacing them could cause the very problem you are trying to avoid.

  22. #22
    Join Date
    Jun 2007
    Location
    Butte, Montana
    Posts
    25,560
    My Cars
    Suck
    Quote Originally Posted by djb2 View Post
    Inspect the originals, but don't replace them if they are in good condition.

    Look at the picture above. One of the red 10A fuses adjacent to the burnt spot was replaced. It has a transparent plastic case. It's likely the failed one was a replacement as well.

    Many replacement fuses have much thinner blades. The thinner blades don't result in the same contact pressure, especially after the thicker factory fuse has been in the connector. The thinner metal also has higher resistance, and doesn't transfer heat away from hot spots as well.

    Further hints that the fuses are to blame is the burnt-out aftermarket fuse holder. That should never happen. The fuse element should safely blow well before the case melts. Once could be corrosion on the fuse holder. Twice points to defective fuses.

    Bottom line: check your fuses if you like, but replacing them could cause the very problem you are trying to avoid.

    - - - Updated - - -



    Inspect the originals, but don't replace them if they are in good condition.

    Look at the picture above. One of the red 10A fuses adjacent to the burnt spot was replaced. It has a transparent plastic case. It's likely the failed one was a replacement as well.

    Many replacement fuses have much thinner blades. The thinner blades don't result in the same contact pressure, especially after the thicker factory fuse has been in the connector. The thinner metal also has higher resistance, and doesn't transfer heat away from hot spots as well.

    Further hints that the fuses are to blame is the burnt-out aftermarket fuse holder. That should never happen. The fuse element should safely blow well before the case melts. Once could be corrosion on the fuse holder. Twice points to defective fuses.

    Bottom line: check your fuses if you like, but replacing them could cause the very problem you are trying to avoid.

    That's unfortunately bad advice, as this is a well documented issue caused by the blower motor failing. It's the cause of most e34 fires, and if you find this type of damage the primary repair should be replacing the blower motor, THEN repairing the wiring. That's assuming the harness hasnt suffered from and cross connections from melting, which is extremely likely as well. Dont just repair the damage and assume everything is fine, very common that it isnt, and a fire will result. This is one of those "Cant stress this enough" type of scenarios, if you have this type of damage to your car, inspect your harness before your car burns down. Once it starts burning it's virtually impossible to extinguish before the car is totaled.

    Go ahead and bite. Plenty for everyone.

  23. #23
    Join Date
    Dec 2004
    Location
    CT, USA
    Posts
    3,957
    My Cars
    e28, e34, e39
    I had the similar problems with that fuse on the 91. Further investigation revealed that I had two time bombs on my hands, a corroded resistor pack as well as stiff blower causing higher than normal current draws on that fuse. The fact that the fuse holder also had corrosion just added to the problem.
    demet
    88'535is, 88'M5, 89'535i, 01'525it

  24. #24
    Join Date
    Sep 2006
    Location
    Los Gatos CA
    Posts
    4,125
    My Cars
    1987 325is, e34, Z3, e39
    There is no evidence that the blower had anything to do with the failure above.

    The fuse was for the fog lights, not the blower circuit. The blower fuse was fine.

    It's likely that someone put in higher wattage fog lights plus wired in additional aftermarket lights. They did use an inline fuse holder with the additional wiring, but had the same bad fuses in both.

    A failing blower might cause a fire at the overheated motor. It should never cause a fire in the fuse box, if the correct fuse is installed. The problem comes when you substitute a higher current fuse, or use a substandard one with thin blades that don't make good contact. Or worse, something sold as a fuse that doesn't provide any circuit protection.

  25. #25
    Join Date
    Dec 2004
    Location
    CT, USA
    Posts
    3,957
    My Cars
    e28, e34, e39
    Sorry I thought that was the blower fuse. Carry on.
    demet
    88'535is, 88'M5, 89'535i, 01'525it

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •