Tracing issues from electrical problems

joeybutts · 08-17-2022, 02:49 PM

Hey gang, dreaded water leak ruined my JB story.

I’ve replaced the JB, I’ve replaced the JBE…. Now not sure where to look. Wipers and squirts are not working, and venting for hvac is not working.

I was going to start tracing issues but every time i go to grt the initial draw off the system it blows the fuses in my multimeter.

It appears everything else is functional in the vehicle, no codes or anything other than a window adjustment.

Any ideas what i need to look at? Picture of board from corrosion/shorting…..

joeybutts · 08-21-2022, 10:03 AM

Bump

joeybutts · 09-09-2022, 08:25 PM

So pulled the plug on the windshield washer pump, prooer voltage at the plug, pump not working, left it unplugged but still getting battery drain, left ibs unplugged, still grtting battery drain,,,, hvac still not working……

Im getting ready to bite the bullet and take it somewhere….

e90yyc · 09-09-2022, 08:51 PM

Hmm. What is your multimeter fused at? 10A? Regardless, doesn’t take much to push over that, but thought I’d ask.

An idea: Try diagnosing this backward. In other words, start with some/all fuses removed, and then add back the ones you don’t suspect first, and gradually work toward the most likely culprits. Any version of this might work, including pulling only the fuses for the suspect circuits, assuming you know what they *might* be. I assume if you did you’d have already pulled them, which is why I suggest trying a more blanket approach by starting with a clean slate.

joeybutts · 09-10-2022, 01:45 PM

Yeah, 10A....

All I know at this point is my wipers/washer pump are not operational (washer pump must be dead but not shorted, just coincidence), HVAC flaps are not functional, yesterday the window warning came on (that's new), the entire fuse section behind glove box is new. Car appears to run fantastic.

I'll begin the process like you said. I'll figure out the minimal fuses necessary to start and go from there. Thanks!

If any one has any other guidance much appreciated.

e90yyc · 09-10-2022, 04:13 PM

Good luck!

When you say minimal fuses required to start, you’re just referring to necessary fuses to turn car on but not actually crank, right?

joeybutts · 09-11-2022, 08:34 PM

Quote:

Originally Posted by e90yyc

Good luck!

When you say minimal fuses required to start, you’re just referring to necessary fuses to turn car on but not actually crank, right?

Correct! Hopefully get a chance Wednesdayish….

08-17-2022, 02:49 PM	#1
joeybutts Private First Class 8 Rep 166 Posts Drives: A dream Join Date: Sep 2015 Location: Hampton, VA iTrader: (0)	Tracing issues from electrical problems Hey gang, dreaded water leak ruined my JB story. I’ve replaced the JB, I’ve replaced the JBE…. Now not sure where to look. Wipers and squirts are not working, and venting for hvac is not working. I was going to start tracing issues but every time i go to grt the initial draw off the system it blows the fuses in my multimeter. It appears everything else is functional in the vehicle, no codes or anything other than a window adjustment. Any ideas what i need to look at? Picture of board from corrosion/shorting….. Attached Images
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08-21-2022, 10:03 AM	#2
joeybutts Private First Class 8 Rep 166 Posts Drives: A dream Join Date: Sep 2015 Location: Hampton, VA iTrader: (0)	Bump
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09-09-2022, 08:25 PM	#3
joeybutts Private First Class 8 Rep 166 Posts Drives: A dream Join Date: Sep 2015 Location: Hampton, VA iTrader: (0)	So pulled the plug on the windshield washer pump, prooer voltage at the plug, pump not working, left it unplugged but still getting battery drain, left ibs unplugged, still grtting battery drain,,,, hvac still not working…… Im getting ready to bite the bullet and take it somewhere….
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09-09-2022, 08:51 PM	#4
e90yyc Art Collector 2427 Rep 3,450 Posts Drives: 2007 328xi (GM-delete 6MT) Join Date: Feb 2018 Location: Canada iTrader: (0)	Hmm. What is your multimeter fused at? 10A? Regardless, doesn’t take much to push over that, but thought I’d ask. An idea: Try diagnosing this backward. In other words, start with some/all fuses removed, and then add back the ones you don’t suspect first, and gradually work toward the most likely culprits. Any version of this might work, including pulling only the fuses for the suspect circuits, assuming you know what they might be. I assume if you did you’d have already pulled them, which is why I suggest trying a more blanket approach by starting with a clean slate. __________________ When I'm dead, just throw me in the trash.
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09-10-2022, 01:45 PM	#5
joeybutts Private First Class 8 Rep 166 Posts Drives: A dream Join Date: Sep 2015 Location: Hampton, VA iTrader: (0)	Yeah, 10A.... All I know at this point is my wipers/washer pump are not operational (washer pump must be dead but not shorted, just coincidence), HVAC flaps are not functional, yesterday the window warning came on (that's new), the entire fuse section behind glove box is new. Car appears to run fantastic. I'll begin the process like you said. I'll figure out the minimal fuses necessary to start and go from there. Thanks! If any one has any other guidance much appreciated.
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09-10-2022, 04:13 PM	#6
e90yyc Art Collector 2427 Rep 3,450 Posts Drives: 2007 328xi (GM-delete 6MT) Join Date: Feb 2018 Location: Canada iTrader: (0)	Good luck! When you say minimal fuses required to start, you’re just referring to necessary fuses to turn car on but not actually crank, right? __________________ When I'm dead, just throw me in the trash.
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