Hi Zone!
Im new to this site and E30s, im trying to install a new stereo someone has been here before and has used a switch live off of the clock for an electric aerial, and taken a switch and a full live from a plug under the glovebox aswell as the earth, ive also earthed it to the body to be sure, it seems like none of its getting power, clock or aerial and the stereo wont turn on. The rev tach aswell as the mpg are not working might that have something to do with it all, thanks for all the help zone!
Charlie.
I just cant figure it out, stereo install.
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
As with the immobiliser, BMW has provided a socket to power a radio. It's a four pin vertical section of the accessories socket behind the glovebox, which provides earth, ignition switched 12 volts, permanent 12 volts live and panel light connections. Power for an electric aerial comes from a single pin socket in one corner of the accessories socket, which has a red/yellow wire going to it. If the socket is already in use, there should be a flying socket at the end of a short piece of red/yellow wire plugged into it.
If your car is fitted with wiring for the electric aerial, it should be a parallel twin cable consisting of a plain red wire to connect to the red/yellow, and a plain white wire, which normally connects to 12 volts after the radio on/off switch, and is used to raise the electric aerial.
Have you had the battery disconnected while working on the car? Failure of the tacho. is often the first symptom of the failure of the SI batteries inside the instrument cluster.
The tacho. may start to work again soon if the main battery is connected again, but the SI batteries should still be replaced before they start to leak and destroy the instrument electronics completely.
If your car is fitted with wiring for the electric aerial, it should be a parallel twin cable consisting of a plain red wire to connect to the red/yellow, and a plain white wire, which normally connects to 12 volts after the radio on/off switch, and is used to raise the electric aerial.
Have you had the battery disconnected while working on the car? Failure of the tacho. is often the first symptom of the failure of the SI batteries inside the instrument cluster.
The tacho. may start to work again soon if the main battery is connected again, but the SI batteries should still be replaced before they start to leak and destroy the instrument electronics completely.
Thank you so much again.
Firstly i have not had the battery disconnected while working on it, should i have? (Relatively new to this) and the way the have connected the aerial is controlled by a seperate switch which i prefer as i will be using the aux alot of the time. Theu have a solid red wire coming off of the clock straight to the switch and a solid white i asume going to the aerial. For some reason they have made it so the clock only works with the ignition on. But since ive started the clocks not working at all. Any ideas? Thanks again.
Firstly i have not had the battery disconnected while working on it, should i have? (Relatively new to this) and the way the have connected the aerial is controlled by a seperate switch which i prefer as i will be using the aux alot of the time. Theu have a solid red wire coming off of the clock straight to the switch and a solid white i asume going to the aerial. For some reason they have made it so the clock only works with the ignition on. But since ive started the clocks not working at all. Any ideas? Thanks again.
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
It's standard advice to disconnect the battery when doing any significant work on any car (not that I follow it myself).
By 'clock', I presume you mean the analogue thing that tells you the time?? This only works with the ignition on?? Or do you mean you have an OBC with a digital display?
There are three versions of a digital time display that can be found on an E30. One is extremely rare, and is just a digital clock, the second is known as a six button OBC (on board computer), and the third is known as a twelve button OBC. None of these display the time with the ignition off, since these displays have a back light that would drain the battery, although if you look at the display at the right angle when it's off, you can just make out the time.
Sounds like you have the correct red + white cable to the aerial, but the wiring and fusing for the clock circuit are nothing like big enough to work the aerial motor. The red part of the wire should be connected to the pin with the red/yellow wire of the accessories socket (Z), which is fused by fuse 28 (30A).
Clock is fused through fuse 21 (7.5A), so you may have blown this, and if it has, this is the same, as far as the SI board batteries are concerned, as disconnecting the main car battery.
It seems likely that the electrics on your car have been 'got at' by some muppet in the past, so I strongly suggest that you find the coloured fuse diagram in the wiki ASAP, and compare it with what you actually have in your car.
By 'clock', I presume you mean the analogue thing that tells you the time?? This only works with the ignition on?? Or do you mean you have an OBC with a digital display?
There are three versions of a digital time display that can be found on an E30. One is extremely rare, and is just a digital clock, the second is known as a six button OBC (on board computer), and the third is known as a twelve button OBC. None of these display the time with the ignition off, since these displays have a back light that would drain the battery, although if you look at the display at the right angle when it's off, you can just make out the time.
Sounds like you have the correct red + white cable to the aerial, but the wiring and fusing for the clock circuit are nothing like big enough to work the aerial motor. The red part of the wire should be connected to the pin with the red/yellow wire of the accessories socket (Z), which is fused by fuse 28 (30A).
Clock is fused through fuse 21 (7.5A), so you may have blown this, and if it has, this is the same, as far as the SI board batteries are concerned, as disconnecting the main car battery.
It seems likely that the electrics on your car have been 'got at' by some muppet in the past, so I strongly suggest that you find the coloured fuse diagram in the wiki ASAP, and compare it with what you actually have in your car.
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
Analogue clock should be plugged into the main dashboard loom directly, and should be permanently powered from fuse 21 on a red wire with a green stripe, so goodness knows what's been done to the electrics on your car.
Pics. of the area could be useful. See the stickies in the 'for sale' forums to see how to post pics.
Pics. of the area could be useful. See the stickies in the 'for sale' forums to see how to post pics.