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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 04-09-2006, 12:08 PM   #1 (permalink)
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New owner help on 2 wires..

Hi everyone,

New owner of a 92 325i with a few gremlins but generally good condition. Right now I need to find out about 2 wires beside the battery positive block under the hood. There are 2 wires with fuse holders in line on the wires and there are no fuses in them right now...any idea what these wires are or control or if important what fuses are supposed to be in them? If needed I can provide a pic... one of them has a second wire that grounds om the chassis right in the same area.

I have both manuals haynes(crap) and bentley but am having trouble tracking this wire prob.
A few of the other probs that have me finding this as well as other little wire probs is that the A/C compressor is not turning on so seems like someone has disconnected it.

I am going to fix all the probs if it kills me as I really like the E36.

Thanks for any help!

Terry
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Old 04-09-2006, 12:42 PM   #2 (permalink)
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hmm was there any chance the previous owner was running subwoofers, or anything? It sounds like it was the power line for an amp or something?
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Old 04-09-2006, 12:48 PM   #3 (permalink)
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thats what i would say... sounds like a power/fuse block for an aftermarket amp
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Old 04-09-2006, 01:24 PM   #4 (permalink)
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i really dont understand why people dont like haynes manuals. its never steered me wrong. what is so great about bentley?
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Old 04-09-2006, 02:41 PM   #5 (permalink)
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These really look stock though guess I will post a pic...no aftermarket stereo that I can tell, as orig radio was there (til last week hehe)...

K so any ideas or old threads on troubleshppting A/C not turning on? I am pouring through manuals and wiring diagrams etc. but am sure ther must be a write up or someone who has gone through similar no power to compressor etc.

I will provide more details as I dig in though as always fix everything presented to me eventually.

Back to these wires will post a pic in a bit...
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Old 04-09-2006, 04:21 PM   #6 (permalink)
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K HERE are some pics showing the fuse missing wires as well as 2 other questions and wires I cant figure out.

There is also the white plug that is attached to nothing that comes out of the firewall, as well as a cut off 2 wire coming out of the firewall in these pics.
Any help appreciated.

here are 3 pics showing all the 3-4 things that I am looking for answers to.

thanks
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Old 04-09-2006, 04:22 PM   #7 (permalink)
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white plug?
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Old 04-09-2006, 04:23 PM   #8 (permalink)
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and finally down in bottom of the previous pics in the hole you can see a wire out of the firewaall that is cut off wiith a yellow and red wire in it...look close and thanks for any help on these everyone
Terry
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Old 04-09-2006, 05:18 PM   #9 (permalink)
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I don't have anything like that on my 95', but a 92' might be different. Anything not working on the car? Maybe some kind of alarm wiring?
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Old 04-09-2006, 09:34 PM   #10 (permalink)
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Looks kinda like an alarm system siren plug?

The location and wire colors look kinda like an alarm system siren plug to me. The other two fuse holders look like ground wires if they're spliced into that one running off to the right, but I can't tell without removing the electrical tape and seeing another picture. Did the car have an alarm before and maybe somebody yanked it out?







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Old 04-09-2006, 10:40 PM   #11 (permalink)
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ya alarm possible, guess my best bet is to peal back and chase the wires through the firewall...

The white plug tho I swear is stock though as there are other similar plugs in car.

This A/C compressor not turning on has me scratchin my head tho as all fuses relays climate control all seem to function. I cant find a real troubleshoot description in the manuals or forums either...

hmmm...
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Old 04-10-2006, 08:11 AM   #12 (permalink)
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Lightbulb riggie didge

Maybe your A/C is out of gas...
Some cars come out with a pressure switch that only allows the A/C clutch to operate when the pressure is at the correct levels..
saves your compressor running dry could be a good thing till you find the problem..

good luck


if you have a test light connect it to either side of the fuse holder, if it glows brite something large is connected to it,
some telecommunication trades people use a f-Set for tracing cables, connect one end of the signal injector to chassis ground and the other to the wire in question.. the with the remote locator's you can start (sniffing) around the cars wiring loom following the wire by sound.

My guess would be that the fuse holders are for a mobile phone hands free unit....B) or special services that are to be connected at all times .......

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Old 04-10-2006, 09:44 AM   #13 (permalink)
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good stuff thanx man... will start sniffing and a/c answer is plausible as well...
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