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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 03-11-2009, 11:31 PM   #1 (permalink)
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gauges flickering

I have read reasons for both gauges to have these flicker problems but I am hoping that they are both being caused by the same thing. They both flicker intermittently. I can tap on the clear gauge cover and they bounce around. Do you think its the battery on the cluster or something else? Or not related to each other? Everything else works fine...........
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Old 03-11-2009, 11:32 PM   #2 (permalink)
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I took the cluster out and the batteries are checking out ok. Is it possible that the board is bad or the entire cluster needs replaced? I hope its not the whole thing, I would like to keep the mileage and everything original.

Oh, while I was taking it apart, I have a single white wire hanging there and I dont know where to put it back. The end if it was stripped back, so it was shoved somewhere...............Thanks
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Old 03-13-2009, 08:33 AM   #3 (permalink)
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FIXED....Looks like the previous owner had worked on it at one time. The nuts that hold the 2 gauges in the circuit board where not even there. Apparently that grounds it to the board and they were moving around when I tap on them or the engine revved up.....
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Old 03-13-2009, 08:38 AM   #4 (permalink)
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Thats great news, glad you found the problem, my 1st answer was going to be remove the cluster and investigate for loose connections etc.
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Old 03-13-2009, 08:40 AM   #5 (permalink)
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I still dont know what that wire is. I didnt put the cluster back in yet till I find out. Everything seems to be working though. Maybe I'll cap it off and just see what happens in the future.....
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Old 03-13-2009, 10:29 AM   #6 (permalink)
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Yea best to cap it off, dont want to be having a fire!!!, it must be for something unless the P O added something after market and took a feed from the cluster.
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Old 03-13-2009, 12:49 PM   #7 (permalink)
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I know the SI boards go out. Mine is doing something similar. Have taken it apart and put it back together after finding nothing wrong.
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Old 04-26-2009, 09:59 PM   #8 (permalink)
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Ok, I got the car back running and the gauges back into the car. I capped off that white wire and now my speedo and odometer are not working. Everything is plugged back into the cluster but no speedo. It worked fine before. Any suggestions on that white wire???
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Old 04-27-2009, 12:36 AM   #9 (permalink)
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Post Speedometer not working

Check fuse 12
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Old 04-27-2009, 06:48 PM   #10 (permalink)
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Post White wire location

Again, this is from walking around the salvage yard, and I saw a white wire soldered to the top solder point on the back side of the turn signal lever on a couple of 3-series. If you can trace the wire to connector 202, then I think I'm on target. FWIW, the white wire is part of the high beam circuit.

Adios for now.
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Old 04-27-2009, 08:42 PM   #11 (permalink)
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It was the fuse, I forgot while I had the topend tore down, I was putting fuses in there rightful place and I was a few short. Speedo was one of them....I always assume the worst, forgetting about fuses.

The high beams still work without the white wire connected. As of now, I havent found anything not working right....I will try and trace it back with a tone generator that I have from work.
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Old 04-28-2009, 07:44 AM   #12 (permalink)
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Smile Glad we solved one problem

Quote:
Originally Posted by 325guy View Post
It was the fuse, I forgot while I had the topend tore down, I was putting fuses in there rightful place and I was a few short. Speedo was one of them....I always assume the worst, forgetting about fuses.

The high beams still work without the white wire connected. As of now, I havent found anything not working right....I will try and trace it back with a tone generator that I have from work.
I like a happy ending. Checking the easier stuff first is a classic troubleshooting principle with autos and computers.

Two other places white wires come into play are with the radio. One is tied to raising/lowering the antenna as well as a power input to the amplifier (connector 233). The other white is paired up with a yellow at connector 215 and provides a "lights on" input to the radio. Both of these connectors are in the center of the dash.

I'm out of other ideas for the moment....
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