E34 digital clock

[Kamz e34]

Hey
I have an e34 525i m20b25 1990. I bought an digital clock to install it (i have the analog clock). When i plug it in it stays on and it writes 0.00 and i have to turn on the flashlight to see.
Can someone help?

[ross1]

I'm guessing you installed the on board computer. The OBC display is back lit with three bulbs, remove the OBC and you will see one on each side and one on the back. They frequently burn out and are rather expensive little f$%#@%#$ to replace.

[Kamz e34]

I'm guessing you installed the on board computer. The OBC display is back lit with three bulbs, remove the OBC and you will see one on each side and one on the back. They frequently burn out and are rather expensive little f$%#@%#$ to replace.

Yes i will do this but the main problem is that the obc is always on even when the car is off

[E34Driv3r]

Are any of the buttons stuck on?

[Kamz e34]

Are any of the buttons stuck on?

No

[runn3r]

OBC is always on but the light isn't that bright when the ignition is off i think you are missing something. Can you press any buttons? The OBC won't respond if there is no ignition.

[Kamz e34]

OBC is always on but the light isn't that bright when the ignition is off i think you are missing something. Can you press any buttons? The OBC won't respond if there is no ignition.

The obs is always on and bright even when the ignition is on

[zkd]

Hey
I have an e34 525i m20b25 1990. I bought an digital clock to install it (i have the analog clock). When i plug it in it stays on and it writes 0.00 and i have to turn on the flashlight to see.
Can someone help?

If you had an analog clock then the wiring on you clock contains only 3 wires... one of which is the power which is always on, for the digital clock you will need an accessories power also which tells the digital clock that you have turned the ignition off.
attached is a pin-outs for the connector

you will need the following wires connected and it will work well:

- Pin 4 to Ground (-)
- Pin 6 to fuse 17 (+)
- Pin 8 to fuse 1 (+)
- pin 9 to fuse 20 (+)
- Pin 22 to Light switch (+)

Optional:-

- Pin 18 and 19 to the Gonge under the drivers well
- pin 05 to Temp sensor.

that is it.

OBC-Pinouts.jpg

[Kamz e34]

If you had an analog clock then the wiring on you clock contains only 3 wires... one of which is the power which is always on, for the digital clock you will need an accessories power also which tells the digital clock that you have turned the ignition off.
attached is a pin-outs for the connector

you will need the following wires connected and it will work well:

- Pin 4 to Ground (-)
- Pin 6 to fuse 17 (+)
- Pin 8 to fuse 1 (+)
- pin 9 to fuse 20 (+)
- Pin 22 to Light switch (+)

Optional:-

- Pin 18 and 19 to the Gonge under the drivers well
- pin 05 to Temp sensor.

that is it.

OBC-Pinouts.jpg

Thanks for your help��

[uscharalph]

If you had an analog clock then the wiring on you clock contains only 3 wires... one of which is the power which is always on, for the digital clock you will need an accessories power also which tells the digital clock that you have turned the ignition off.
attached is a pin-outs for the connector

you will need the following wires connected and it will work well:

- Pin 4 to Ground (-)
- Pin 6 to fuse 17 (+)
- Pin 8 to fuse 1 (+)
- pin 9 to fuse 20 (+)
- Pin 22 to Light switch (+)

Optional:-

- Pin 18 and 19 to the Gonge under the drivers well
- pin 05 to Temp sensor.

that is it.

OBC-Pinouts.jpg

Saved, as I need to make these wiring changes to my White 1993 525i.