Where's the fuse for reverse light?

scanboy · 10-13-2008, 07:56 PM

My reverse light is out, got and error on the dash, but when I check the bulb, it looks good, so I wanna check the fuse, but couldn't find it, which one is the fuse for reverse light? is there another fuse location other than the one behind the glove box?

bsamoul · 10-14-2008, 12:10 AM

It might not be on a fuse..

scanboy · 10-14-2008, 12:28 AM

Quote:

Originally Posted by bsamoul

It might not be on a fuse..

So what might it be? any idea?

Autobot · 10-14-2008, 01:03 PM

Sometimes, only one of the Filamanets in the bulbs goes out, so it still lights up but will throw an error on your dash

scanboy · 10-14-2008, 08:06 PM

Quote:

Originally Posted by Autobot

Sometimes, only one of the Filamanets in the bulbs goes out, so it still lights up but will throw an error on your dash

I'm pretty sure the bulb doesn't light up, cuz I checked already.

Barbera335 · 10-14-2008, 08:48 PM

Try a new bulb, quicker than hunting down a fuse that might not exist. Reverse lamps, and all exterior lamps for that matter are powered by the FRM control unit so most likely you will be looking for a fuse that powers this control unit.

bsamoul · 10-14-2008, 09:06 PM

usually in cars the reverse lights are hooked up to the transmission so there might be no fuse. you could have a short tho

scanboy · 10-14-2008, 09:19 PM

Just tried a brand new bulb, but still doesn't light up, so might be what bsamoul said, a short

, is there a way to fix it myself (if it is something that doesn't cost a lot of money) or I better bring it to the dealer?

Barbera335 · 10-14-2008, 09:30 PM

You could try swapping the bulb carriers left to right, I believe they are wired the same. If the light comes on this eliminates the FRM control unit as well as the wiring from the control unit to the light bulb and you'll know you need a bulb carrier. If in fact the pins are different left to right or if the light still does not come on I would recommend taking it to the dealer for a wiring check as well as a check of the FRM module. If you have a wiring diagram you could concievably perform the wiring check yourself.

bsamoul · 10-14-2008, 09:49 PM

Quote:

Originally Posted by scanboy

Just tried a brand new bulb, but still does light up, so might be what bsamoul said, a short

, is there a way to fix it myself (if it is something that doesn't cost a lot of money) or I better bring it to the dealer?

Did you do anything to your lights that could cause a short (or make the dealer come up with a story to not hold them liable to helping you) ?

scanboy · 10-14-2008, 10:17 PM

Quote:

Originally Posted by Barbera335

You could try swapping the bulb carriers left to right, I believe they are wired the same. If the light comes on this eliminates the FRM control unit as well as the wiring from the control unit to the light bulb and you'll know you need a bulb carrier. If in fact the pins are different left to right or if the light still does not come on I would recommend taking it to the dealer for a wiring check as well as a check of the FRM module. If you have a wiring diagram you could concievably perform the wiring check yourself.

Bulb carriers? you mean plug the left plug to the right light module? what's FRM?

scanboy · 10-14-2008, 10:20 PM

Quote:

Originally Posted by bsamoul

Did you do anything to your lights that could cause a short (or make the dealer come up with a story to not hold them liable to helping you) ?

Last time I did something was changing the bulb in the 3 rods to LED and that was like more than 2 months ago and shouldn't affect the backup light at all. I don't get it.

bsamoul · 10-14-2008, 11:40 PM

Yeah, I'd just bring it in to the dealer. Woudln't even worry about it

Barbera335 · 10-15-2008, 06:56 PM

Quote:

Originally Posted by scanboy

Bulb carriers? you mean plug the left plug to the right light module? what's FRM?

The part that the bulb slips into and the electrical connector plugs into, if you don't understand that you should take it to the dealer. The FRM is the Footwell Module. It is located on the left kick panel under the panel where the hood release handle is. This module controls exterior lights as well as several other vehicle functions and serves as the back up module for mileage storage. Hope that helps, in your case though I believe you have a defect within the bulb carrier.

scanboy · 10-15-2008, 07:45 PM

Quote:

Originally Posted by Barbera335

The part that the bulb slips into and the electrical connector plugs into, if you don't understand that you should take it to the dealer. The FRM is the Footwell Module. It is located on the left kick panel under the panel where the hood release handle is. This module controls exterior lights as well as several other vehicle functions and serves as the back up module for mileage storage. Hope that helps, in your case though I believe you have a defect within the bulb carrier.

Ok got it, I'll swap the left and right and see what happens, if I can't figure out, I'll have the dealer look at it on my next (which is also my first) schedule maintainance. Thanks to all who replied.

fparsa · 10-21-2011, 11:48 AM

Quote:

Originally Posted by scanboy

Ok got it, I'll swap the left and right and see what happens, if I can't figure out, I'll have the dealer look at it on my next (which is also my first) schedule maintainance. Thanks to all who replied.

old post to bother, but I have the same problem. I thought about replacing the reverse light switch on the trans. Any idea anybody?

Thanks

fdriller9 · 10-21-2011, 11:51 AM

Do you have a multimeter?

Measure the contacts where the reverse bulb sits and see if it's getting power.

10-13-2008, 07:56 PM	#1
scanboy Lieutenant 16 Rep 458 Posts Drives: E90 Montego Blue+Black Int. Join Date: Sep 2007 Location: Torrance iTrader: (0)	Where's the fuse for reverse light? My reverse light is out, got and error on the dash, but when I check the bulb, it looks good, so I wanna check the fuse, but couldn't find it, which one is the fuse for reverse light? is there another fuse location other than the one behind the glove box?
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10-14-2008, 12:10 AM	#2
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	It might not be on a fuse.. __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
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10-14-2008, 01:03 PM	#4
Autobot Brigadier General 84 Rep 3,106 Posts Drives: 15 F22 M235 6MT Join Date: Feb 2007 Location: Charleston, SC iTrader: (8)	Sometimes, only one of the Filamanets in the bulbs goes out, so it still lights up but will throw an error on your dash __________________ Delivered 28 May
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10-14-2008, 08:48 PM	#6
Barbera335 Captain 169 Rep 660 Posts Drives: F25 Join Date: Jul 2008 Location: socal iTrader: (0)	Try a new bulb, quicker than hunting down a fuse that might not exist. Reverse lamps, and all exterior lamps for that matter are powered by the FRM control unit so most likely you will be looking for a fuse that powers this control unit.
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10-14-2008, 09:06 PM	#7
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	usually in cars the reverse lights are hooked up to the transmission so there might be no fuse. you could have a short tho __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
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10-14-2008, 09:19 PM	#8
scanboy Lieutenant 16 Rep 458 Posts Drives: E90 Montego Blue+Black Int. Join Date: Sep 2007 Location: Torrance iTrader: (0)	Just tried a brand new bulb, but still doesn't light up, so might be what bsamoul said, a short , is there a way to fix it myself (if it is something that doesn't cost a lot of money) or I better bring it to the dealer? Last edited by scanboy; 10-14-2008 at 10:31 PM..
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10-14-2008, 09:30 PM	#9
Barbera335 Captain 169 Rep 660 Posts Drives: F25 Join Date: Jul 2008 Location: socal iTrader: (0)	You could try swapping the bulb carriers left to right, I believe they are wired the same. If the light comes on this eliminates the FRM control unit as well as the wiring from the control unit to the light bulb and you'll know you need a bulb carrier. If in fact the pins are different left to right or if the light still does not come on I would recommend taking it to the dealer for a wiring check as well as a check of the FRM module. If you have a wiring diagram you could concievably perform the wiring check yourself.
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10-14-2008, 11:40 PM	#13
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	Yeah, I'd just bring it in to the dealer. Woudln't even worry about it __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
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10-21-2011, 11:51 AM	#17
fdriller9 Banned 253 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	Do you have a multimeter? Measure the contacts where the reverse bulb sits and see if it's getting power.
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