Need Help--Electrical/starting problem

[g300d]

Originally Posted by bcredliner

I have an intermittent starting problem. Sometimes it starts fine. Sometimes I will get just a click like a dead battery. I can shut it off and start it immediately after that and it starts fine. Once in a while there isn't even a click and none of the dash lights come on. I have jump started it twice. First time it ran until I reved it and then it died. I jumped it again, drove it 4 miles with no issue and got home, turned it off and it started fine.

What I have done so far:

This started with a dead battery. Battery was bad. So was first replacement.
I have the correct and good battery installed
Checked for corrosion at front and back battery cable connections.
Turned on air on max and bright lights when it was running- alternator adjusted.
Monitored the alternator for spikes or dropping below min spec--no issue.
Let it sit for 8 hours checked battery status, no drain.
When it won't start there is no voltage under the hood but voltage at the battery is normal. Right now it is reading the same voltage at the battery and under the hood.

I do have a battery cut off switch but I can't make it malfunction. If I can make it happen again I will check if there is voltable on both sides. I am using a multimeter for testing voltage. I am aware electronics are sensitive and jumped it properly.

Any idea what troubleshooting I can do or what the problem might be?

Had similar situations in different vehicles over the years (not the X-yet), it was usually the starter.

ETA except for the no power to other components. IIRC I saw a similar situation here or on another BMW forum, a faulty ignition switch can cause similar symptoms.

[Pekelicious]

My I.S Just arrived and I just picked it up....
The damage below( not suitable for people with heart problems 😹&#128569....



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[StephenVA]

Originally Posted by Pekelicious

My I.S Just arrived and I just picked it up....
The damage below( not suitable for people with heart problems 😹&#128569....



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That pricing is just painful....

[David.X5]

$365 USD ? Why so much. BMW Fairfax is asking $76 which is more than I paid last year

Update: Sorry, just noticed "Angola". Must be hard to keep a BMW going with import costs like that

[Pekelicious]

I hardly buy parts in the country, usually ship them, since I'm on a hurry to have it ready for the road trip I just went and grab it


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[Pekelicious]

Ok IS has been changed, make sure the new IS is aligned just as the old...( 10min job)

Update: the symptoms still present. I haven't reset anything yet... Will report back


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[Pekelicious]

Quick update.... The car won't start if I put in P.... Only if is in N.... What am I facing here?!?!?🤔🤔🤔


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[80stech]

I think we need to clear up the "no power under the hood when it happens" first. but if it starts in neutral then sounds like neutral safety switch, maybe try to do a forum search, someone else just went through that. You need to do a little more diagnostics or it's going to cost you a fortune in parts!

[Pekelicious]

I had to switch the IS anyway cuz of some electrical gremlins( lights would turn on after I turn them off and some other stuff, all that sorted)


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[Pekelicious]

When I put in P it doesn't light up, I was browsing thru the forum and I read " play with gear selector P and N and try it"... That's when I paid attention to P not lighting up


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