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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Thu, Mar-21-2019, 11:25:54 PM   #1
M-technik-3
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Default Car died today

Driving home from work it just died with no warning no symptoms either.

No power and I swapped in a know good battery. I have no power anywhere.

Fuseable link? Highly doubt it but I should get at least get power to lights or the clock. No power to cluster either.

Thoughts? My boss allowed me use of my company vehicle while I am fixing my car.

Greg
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Old Fri, Mar-22-2019, 04:48:29 AM   #2
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Default Re: Car died today

Use a voltmeter and see if you are getting 12-14 volts at the jumper lugs under the hood.

From there you can start moving down the list grounding straps, fuses, etc.

Chris
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Old Fri, Mar-22-2019, 04:08:58 PM   #3
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Default Re: Car died today

Check the main fuse if you haven’t already
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Old Fri, Mar-22-2019, 08:40:53 PM   #4
M-technik-3
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Default Re: Car died today

I have checked all normal stuff, swapped ews deleted ecu in, added a brand new battery nothing. No power anywhere. Wondering if I have a broken wire in maybe my harness as I see no reason why a fuseable link would have gone bad just driving down the road. Odd

Edit: I tried to jumpstart the car via the jumpstart lug and ground and got no power doing that as well.
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Old Fri, Mar-22-2019, 10:11:07 PM   #5
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Default Re: Car died today

check the jump lug itself ( I had one melt/go bad within the plastic cover)

then as said above just start looking for 12v all over the car, that would isolate the break
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Old Fri, Mar-22-2019, 10:23:33 PM   #6
M-technik-3
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Default Re: Car died today

Yeah need to get car towed home into heated garage vs it being on next town over.

Too much stress right now, work and life then toss in added car issues.
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Old Fri, Mar-22-2019, 10:46:55 PM   #7
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Default Re: Car died today

I would be looking at the battery cable junction box and starter under the hood. Is there 12V there? 12V at the wiring connection by the fuse box?
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Old Fri, Mar-22-2019, 11:13:51 PM   #8
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Default Re: Car died today

I'll know tomorrow, not dealing with it now.
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Old Sun, Mar-24-2019, 04:24:56 PM   #9
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Default Re: Car died today

No power at fuse box input but power at the lug and all points and it did melt. I have never seen that happen. I really don't want to change out the wiring harness but thinking for some reason I think that is what I have to do.
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Old Sun, Mar-24-2019, 05:11:19 PM   #10
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Default Re: Car died today

it can absolutely happen. If corrosion starts at one of the ring terminals on the main power lead, electrical resistance builds up - so does heat. Add in some vibration and bingo.

The wire repair isn't too bad, and the junctions are avaialble at BMW. You can bypass the jump lug too if that's where your problem is. I did for a few weeks.

Untitled by GhstRidr, on Flickr

This was within the plastic cover - wouldn't have found it if I didn't start looking for voltage drops. (Z3)

If it's the main power lead it comes out of the harness pretty easily. Just a couple of zip ties attach it to the bundle crossing the top of the engine bay within the cover.
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Discussing My 98 Dakar Yellow "build" thread in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)