Vdo 7k swap problems

[alpineE30]

1988
To be exact 9/88


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Do you know how to read wiring diagrams?

[JeLani]

I can learn

Do you know how to read wiring diagrams?

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[modernist]

Is the C104 3-pin connector in the glovebox connected? Models produced before 9/87 get the tach and econ signals from there, not C101.

Also if you're going to have the cluster out again, I would replace all of the bulbs. If any are original, they're going to die soon. The small bulbs without plastic base are Sylvania 2721; small bulbs with plastic base are Sylvania 2721MF; large bulbs are Sylvania 2821

[alpineE30]

http://www.wedophones.com/BMWManualsLead.htm there you go have fun, im not responsible for you frying wires or lighting up like a christmas tree lol

[JeLani]

http://www.wedophones.com/BMWManualsLead.htm there you go have fun, im not responsible for you frying wires or lighting up like a christmas tree lol

Appreciate will take a look at it

[JeLani]

Is the C104 3-pin connector in the glovebox connected? Models produced before 9/87 get the tach and econ signals from there, not C101.

Also if you're going to have the cluster out again, I would replace all of the bulbs. If any are original, they're going to die soon. The small bulbs without plastic base are Sylvania 2721; small bulbs with plastic base are Sylvania 2721MF; large bulbs are Sylvania 2821

I'll try and have a look at that, was actually going to ask you about this.. But i will check on that since even with the old cluster never worked (tach) , so c101 to c104 3-pin.

[JeLani]

I'll try and have a look at that, was actually going to ask you about this.. But i will check on that since even with the old cluster never worked (tach) , so c101 to c104 3-pin.

And is there soldering involved in the with the bulbs? And are you referring to the ones that light up or asking about ones such as the battery light one?

[RobDog]

I have had similar clusters problems when I put a screw through my S.I. board. There are 4 screws that hold the cluster to the dash along the bottom of the cluster. The 2 longer screws should go to the outside, short screws to the inside. I did the opposite and shorted out my S.I. board. I had the exact same problems as you have minus the fuel gauge. I had no light on left, no tach, no economy, si light on the far right, and no temp.

http://www.r3vlimited.com/board/showthread.php?p=3676570#post3676570

[modernist]

And is there soldering involved in the with the bulbs?

Nope. Turn 90° to remove; each one has two metal tabs holding it in, you twist the bulb to line the tabs up with the slot and out it comes. The large illumination bulbs (2821) can be removed from their plastic socket and replaced; most of the smaller bulbs (2721MF) come with a new plastic socket.

c104 3-pin

Yeah. What model did you get your engine harness from?

[Gregs///M]

Hey OP, there is a very real chance you received a non working cluster but the previous owner may have not known. I'll explain.

With a 30 year old cluster (specifically the SI board batteries) the batteries are just about dead and barely hold a charge. Cluster may work perfect when installed in previous owners car but once they unplug the cluster and the SI batteries discharge their final life, they will never come back. Once you receive the cluster, batteries are dead. Once they are dead, your tach, temp, MPG and OBC will not function properly. They do not necessarily all not work, it may just be one, two or more gauges or it may just be your SI LED's not working. Eventually, the Si LED's will remain on and drain your starting battery.

You will need to swap your early model fuel gauge to your late model cluster. Tachometers and coding plugs rarely fail, maybe 1 in every 200. Also check the SI board damage as posted by another user, I was the one who made that thread.

Good luck.

[JeLani]

Hey OP, there is a very real chance you received a non working cluster but the previous owner may have not known. I'll explain.

With a 30 year old cluster (specifically the SI board batteries) the batteries are just about dead and barely hold a charge. Cluster may work perfect when installed in previous owners car but once they unplug the cluster and the SI batteries discharge their final life, they will never come back. Once you receive the cluster, batteries are dead. Once they are dead, your tach, temp, MPG and OBC will not function properly. They do not necessarily all not work, it may just be one, two or more gauges or it may just be your SI LED's not working. Eventually, the Si LED's will remain on and drain your starting battery.

You will need to swap your early model fuel gauge to your late model cluster. Tachometers and coding plugs rarely fail, maybe 1 in every 200. Also check the SI board damage as posted by another user, I was the one who made that thread.

Good luck.

Will do and thank you

[JeLani]

Nope. Turn 90° to remove; each one has two metal tabs holding it in, you twist the bulb to line the tabs up with the slot and out it comes. The large illumination bulbs (2821) can be removed from their plastic socket and replaced; most of the smaller bulbs (2721MF) come with a new plastic socket.



Yeah. What model did you get your engine harness from?

/\ this i do not know i bought it like this.