[ISSA335]

Originally Posted by gbalthrop

It would be helpful to identify WHAT turns off & on, and WHAT, if anything, remains ON. Do Tach & Speedo go to "0"?
Does Outside Temp display remain shown? Time as well? What about Fuel Level? B/C Buttons on Turn Signal Lever?

Fuses do NOT normally function intermittently, on/ off/ on, etc. Attached is ISTA ScreenPrint of KOMBI Wiring Diagram
with Lines ID showing function of the 7 wires. Note Outside Temp display & B/C buttons are ONLY hard-wired functions.

All other inputs are via CAN Bus, K_CAN_H (Orange/Green wire) & K_CAN_L (Green wire). If the K-CAN Bus Inputs
are intermittent, then I would check the Connector X11175 on rear of Instrument Cluster, and also Connector
X14272 (Black) at the JBE, per the attached Location & Connector View ScreenPrints. Check for any corroded/
damaged Pins/ Sockets, clean & reassemble. These locations and Fuse identification are for LATE 2007 335i,
built AFTER 3/1/2007. You want to check Power Supply (pin #9) and Ground (pin #18) as well as K-CAN pins.
If you have an EARLY 2007 335i, those items differ, so post back with your Last-7 Characters of VIN.
George

Everything turns off/on. The entire cluster along with the radio lights. The audio from the radio continues to play as well as AC continues uneffected but all light and everything turns off. All the gauges fall to 0, then return to what they should be, every service light comes on then turns back off till it repeats the cycle. I know fuses don't really go intermittently but I just wanted to double check everything.

Currently I've unplugged and cleaned the plug for the gauge cluster, checked all fuses related to gauge cluster OBD and looked over the power distribution box and nothing really looks out of place.

I will double check all the wiring you have referred too and check back. Just weird to me the radio turns off as well but my build date is a later model 07 so everything you outlined should apply.