Electrical issues cluster not working. Please help

Elfroggey · 08-25-2023, 11:36 AM

To start, thank you for your time.
I have a BMW 335i convertible 2008 with the n54.

I’m fairly new to this car since I just got it a few months ago.

I haven’t had any issues with it whatsoever other than regular maintenance and the radio not working. (Yes it tried the bypass methods and it didn’t work)

But that was months ago and I chose to not worry about music as it’s not a necessity for me at the moment.

————-(you can skip to here if you don’t wanna read all that)—————-

Now the issue is the electric functions in my car stopped working.

I was driving to work as normal and my cluster, dash, idrive, & ac turned off. While driving but the car still turned on/off as normal and drives around.
Later while diagnosing at home I realized that the windows, power locks and convertible drop top stopped getting power too.

I checked every fuse I could and all were still good under the passenger side. I replaced the battery and plan on checking the alternator. (As I’ve been told to do)

I’ve been told it could be the Junction Box. But I want to know if anyone else has had the same issue or can point me in the right direction.

——————-
Long story short: no ac, windows, power locks, idrive, cluster, gauges, interior lights, and seats won’t move but car still cranks and drives.

I’m willing to answer any questions needed.

Ps. It has a jb4 piggy back tune and was told it can’t be that. But not sure if you ask me personally

Elfroggey · 09-29-2023, 11:49 AM

UPDATE 9/29:

I have noticed a ticking noise behind the cluster that won't stop even if the car is off (maybe that's the cause of the problem?)

Replaced the JBE, and nothing changed.

So I pulled out the Footwell module, and when disconnecting it, I lost control over the headlights ( as it should ), and then plugging back in, I regained control over the headlights. So it seems that the Footwell isn't the problem because it functions properly with headlight controls. (maybe??)

I still have control over Mirrors and seat controls.

No control over AC, Cluster, Idrive, Windows, Dome Lights, Gauges, & Radio.

(The Footwell module is FRM 2 so I can't get it tested/rebuilt near me)

Any ideas?

I have tested the alternator and replaced the battery with the exact same model/make as the last one with exact same specs. but still no luck

Car cranks and drives perfect. OBD2 Reader works and I'm able to read mph, rpm and temperature with my scanner.

08-25-2023, 11:36 AM	#1
Elfroggey Registered 0 Rep 4 Posts Drives: 335i 2008 n54 Join Date: Aug 2023 Location: Houston iTrader: (0)	Electrical issues cluster not working. Please help To start, thank you for your time. I have a BMW 335i convertible 2008 with the n54. I’m fairly new to this car since I just got it a few months ago. I haven’t had any issues with it whatsoever other than regular maintenance and the radio not working. (Yes it tried the bypass methods and it didn’t work) But that was months ago and I chose to not worry about music as it’s not a necessity for me at the moment. ————-(you can skip to here if you don’t wanna read all that)—————- Now the issue is the electric functions in my car stopped working. I was driving to work as normal and my cluster, dash, idrive, & ac turned off. While driving but the car still turned on/off as normal and drives around. Later while diagnosing at home I realized that the windows, power locks and convertible drop top stopped getting power too. I checked every fuse I could and all were still good under the passenger side. I replaced the battery and plan on checking the alternator. (As I’ve been told to do) I’ve been told it could be the Junction Box. But I want to know if anyone else has had the same issue or can point me in the right direction. ——————- Long story short: no ac, windows, power locks, idrive, cluster, gauges, interior lights, and seats won’t move but car still cranks and drives. I’m willing to answer any questions needed. Ps. It has a jb4 piggy back tune and was told it can’t be that. But not sure if you ask me personally
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09-29-2023, 11:49 AM	#2
Elfroggey Registered 0 Rep 4 Posts Drives: 335i 2008 n54 Join Date: Aug 2023 Location: Houston iTrader: (0)	UPDATE 9/29: I have noticed a ticking noise behind the cluster that won't stop even if the car is off (maybe that's the cause of the problem?) Replaced the JBE, and nothing changed. So I pulled out the Footwell module, and when disconnecting it, I lost control over the headlights ( as it should ), and then plugging back in, I regained control over the headlights. So it seems that the Footwell isn't the problem because it functions properly with headlight controls. (maybe??) I still have control over Mirrors and seat controls. No control over AC, Cluster, Idrive, Windows, Dome Lights, Gauges, & Radio. (The Footwell module is FRM 2 so I can't get it tested/rebuilt near me) Any ideas? I have tested the alternator and replaced the battery with the exact same model/make as the last one with exact same specs. but still no luck Car cranks and drives perfect. OBD2 Reader works and I'm able to read mph, rpm and temperature with my scanner.
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