hopwood

Hey guys,

I mainly hang out over on the 928 forum here, had one for years and spent far too much money on it. Recently scratched the 911 itch with, IMHO, the best looking variant of the last 30 years, the 964... she's a midnight blue Carrera 2 manual with sports seats and a factory LSD. I love it to bits.

So... I've removed the thoroughly nasty Sony "Xplod" CD tuner that was in my 964. I've removed the frame and the old wiring loom and I'm left with 2 bunches of cables and the antenna as shown in the pic.

I'm trying to install a nice period Blaupunkt I picked up.

With my multimeter I've established that the bunch of wires on the left in the photo is the speaker cable. I've established the pairs and that's all fine.

I've also established which is the permanent 12v, which is the switched and which is the earth. Now, a few questions:

- There is a green wire in the 964's bunch which appears to be 5-ish volts permanently - any idea what this could be?

- I can't find an illumination feed (ie. 12v when headlights on). Is this a problem or does the 964 just not have one?

- In the second photo below, you can see the icons on the Blaupunkt plug showing how to wire up the ISO connector correctly. What's the one on the top group, bottom left, saying "12v Kl. 15/30". I can figure out all the others but this one is a mystery. :?:

Many thanks for all help!

Joel

http://www.flickr.com/photos/40247429@N00/6943710552/http://www.flickr.com/photos/40247429@N00/6943710552/ by http://www.flickr.com/people/40247429@N00/, on Flickr

http://www.flickr.com/photos/40247429@N00/7089780419/http://www.flickr.com/photos/40247429@N00/7089780419/ by http://www.flickr.com/people/40247429@N00/, on Flickr :?: :?:

ToreB

964 and 993 have no illumination input to the original head unit. Get it from one of the switches above the opening or the illumination of the lighter socket.
Remember to connect the power supply to the antenna amplifier (thin wire bundled with the antenna coax) to the switched output on your head unit. I would think that is the one marked with 12V and a switch symbol on your Blaupunkt.
I would guess "per 12V" is the permanent 12V feed to the head unit, and +12V KL.15/30 to be the switched 12V input. Terminal 15 is the european notation of switched 12V. Terminal 30 is permanent 12V. The last icon on the head unit is Ground. (top left)
The green wire is most probably the alarm supervision lead, I believe it is to be connected to the head unit chassis ground. If it's disconnected (head unit removed) the alarm would go off.
Please verify the above with your measurements, I have a rather blurred schematic.
Cheers,
Tore

VR6-er

Perhaps the attached will help.

hopwood

Thank you very much both posters. Tore, it never occurred to me to connect the Aerial to the output of the head unit, I was going to run a feed from the switched live, so thanks for that.

I *think* that agrees with the wiring diagram above - I can't quite make out the text, but it looks like the connection on the left edge is labelled "alarm system" so yes that could be the green wire.

Since I've already identified the earth, switched live and perm live, I'll wire it all up as suggested and see if it works! One encouraging fact is that my aerial booster wasn't connected at all so at least that would account for the pisspoor reception.

Thanks all, will report back.

Joel

hopwood

Hey guys,

Just checking back in as promised!

Well Tore you were spot on. That 2nd from left icon is indeed a 12v output from the head unit that activates when the unit is switched on. I connected this to the dangling wire connected to the aerial booster and hey presto - perfect (or perfectly decent) FM radio reception! I can't tell you how satisfying that is!

I wired up the 15/30 one to the switched live as you said and everything works fine. Here's a pic of the finished installation.

Couple of points that may help other rennlisters in the future: I used bullet terminals (bought from Maplin) to connect up the speaker wires. They seemed safer than lug/spade as they are fully shielded. I crimped these on with a crimping tool so no solder was involved anywhere.

To get the head unit properly seated there's a fair bit of jiggling and shoving. You need to remove the fog light and heated window switches to get her in. As most of you no doubt know, these unscrew easily by hand.

Many thanks for all your help.

Best regards,

Joel
Kent, UK
http://www.flickr.com/photos/40247429@N00/7120582065/http://www.flickr.com/photos/40247429@N00/7120582065/ by http://www.flickr.com/people/40247429@N00/, on Flickr

hopwood

Couple of PSs:

- I ignored the green wire with the permanent 5v. I believe as suggested above this is to connect to the radio chassis and the alarm, but since I don't have an alarm I didn't do anything with it.

- The radio comes on even with no keys in the ignition, despite my wiring the perm live to the perm 12v lead on the head unit, and the switched as described above. Must be a peculiarity of the head unit. There's only 1 perm live feed in my car - I verified all that with a multimeter - so it must be the head unit. The code persists correctly so I can't have wired it up wrong. Anyway - not a problem.

Cheers,

Joel

PS: I hate modern blingy head units and this Blaupunkt is early 90s so perfect fit for the '64 IMHO! The speakers are not great so I'm not going for audiophile quality anyway.

ToreB

Good to see you succeded, it looks very nice in the 993 interior. I agree on all your findings as well.
Cheers,
Tore

August West

Good thing you ignored the green wire. Adrian writes about it in THE BOOK as the "green wire syndrome." As part of the alarm system, it becomes the hard-to-find current drain source if, in subsequent stereo unit upgrades, the uninformed installer thinks that the green wire should be grounded. Adrian says it should be taped up and left open-circuit to avoid problems with the alarm system.