348 Wiring Diagrams

Unfortunately, no clues in the pictures. Google doesn't give me any hits for CMS, Cactus, CAA-Ver3, etc.
Looks complicated.

Is that small module (stuck on the case) part of the alarm system?

 

It seems that yes... this belongs to that module

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So that sticker is on the small module and there are no identifying marks on the main one?


Anyway, it's unlikely that these old alarm systems affect the engine management system, so I'd be focussing on the starter, coilpack and fuel pump circuits. Good luck with the fuel pumps after 20 years

 

That's all I'm worried about , the fuel pumps were replaced with new ones, the tank was cleaned, etc., the entire engine has been restored...

 

It seems to be this same model:

https://www.ebay.es/itm/285892677053?mkcid=16&mkevt=1&mkrid=1185-127638-7840-0&ssspo=NA-1VCXhQ9a&sssrc=4429486&ssuid=0X_2cycETAy&var=&widget_ver=artemis&media=MORE

 

Could be a variation of it.

i.e. a Getronic system, but we still need the model number. There are manuals available for some models.

https://www.manualslib.com/manual/1043484/Getronic-Gt613.html#manual

They seem to only affect the starter (via a grey/black wire)

(EDIT: The turn signals may also be affected by the alarm. You may have to repair some of the turn signal wiring. i.e. either the blue or blue/black wiring going to the turn indicators.

Lights diagram here:

https://www.dropbox.com/t/WcfBTC9YXdCXGdf7

 

Today I was working with the alarm system, following all the wires.

For example, the blue wire belongs to the alarm system. I guess what I have to do is remove it from there, and so on with all of them, right?


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Assuming the yellow plug is plug D, then the two red wires (on pin 2) go to the left and right brake lights. I'm not really sure why the alarm would be hooked up to the brake lights, but the blue wire is not shown in the normal wiring diagrams, so I guess that confirms that the blue wire is part of the alarm.

The black plastic sheath on the harness looks standard, though. If the blue wire was threaded through the normal sheathing, then it seems like a quality alarm installation. Or is that harness dedicated to the alarm?

(EDIT: I don't see a blue wire in the alarm wiring diagram in post #31.)

 

Is your car fitted with a high stop light? If so, if you cut the blue wire, make sure your high stop light still works. I would cut the blue wire with enough length to re-splice it.

 

I followed the blue wire and it comes from here!

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No…

 

It should be ok to cut the blue wire then.

 

I see a lot of those (same) wire colours in your earlier picture. The alarm wiring diagram mentions "additional sensors". Perhaps the plug on the side of the alarm ECU is for additional alarm sensors.

I guess it is ok to cut all those wires coming from the harness.

white/yellow
white/blue
green/black
violet/black
etc

 

We’re still working on the alarm issue. I’ve already identified all the cables except for these two, which go to a relay installed for the alarm.

They are the yellow and yellow/black wires, and they come from the control unit located behind the driver’s seat.

Where should I connect these two wires? What is their original connector?

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Larger gauge yellow and yellow/black may be ignition key power going to the ECUs (yellow is the right bank, yellow/black is the left bank).

The key power wires come from relay panel plug F (pins 8 and 9). The wires go to connectors 119 and 118 and then to the ECUs.

See the engine diagram:

https://www.dropbox.com/t/Z0BnEMmcpjYJAQyo

 

Looking at the relay diagram, I'd say key power is provided on pin 30 and the two pin 87's go to the two Motronic ECUs

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The two 87 contacts are the "normally open type".

I'm not sure how the relay coil is wired up (pins 85/86). Is there a jumper wire between pin 30 and one of the coil wires? If so, the alarm ECU is probably providing a ground to the coil when de-immobilised.

 

In theory, you could just splice the pin 30 and the two pin 87 wires together. The yellow and yellow/black wires come from a common (key) source anyway.

Can you hand draw the wiring going to the relay (with wire colours) and post a photograph of it here? Maybe I can make more sense of the circuit than I can from the photos.

 

Thank you very much


Looking at the photos, you can see the F connector and the cable going to the relay.

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I'll do that first thing tomorrow morning!

 

Pin 86: Yellow/white wire coming from the small alarm control unit.

Pin 30 (2 wires):

Thick yellow wire coming from pin 9 of the F connector

Thin yellow wire coming from the large alarm control unit

Pin 85 (2 brown wires): Both wires come from the large alarm control unit.

Pin 87 (1):

Yellow wire coming from the car control unit

Pin 87 (2):
Yellow/black wire also coming from the car control unit

On the other hand, on the F connector in the pin 8, there are two wires: one blue or gray wire coming from the small alarm control unit, and another gray wire coming from the large alarm control unit.

After this, I understand that everything needs to be removed, and the yellow wire from pin 87 should be connected to pin 8 of the F connector, and the yellow/black wire from pin 87 should be connected to pin 9 of the F connector.

 

Thanks for the update. Sounds promising.

 

Qavion, would you be so kind as to post those links again? I have a 95 348 Spider if that's relevant. Thanks so much for your assistance. Roger

 

Sorry, Roger, what's the issue. It's a bit of a hassle posting all the diagrams again.

Engine? Instruments? Alternator/battery? Windows? Doors? Mirrors? HVAC? etc..

I don't really have any specific Spider diagrams, but most of the circuits should be the same.

 

Qavion, sorry for inadequate description. I'm about to remove the steering column stalk controls to get them rebuilt. At same time I'm planning to change instrument cluster and central console lighting to LED bulbs. The HVAC system is dead which is probably the "hidden fuse" but I plan to check all connections, grounds and sensors while I have the central console removed. So diagrams related to those issues would be very, very help. Thank you! Roger

 

HVAC diagram:

https://www.dropbox.com/t/u2FAyQP6Vjv2b7gJ

Instruments (later 348)

https://www.dropbox.com/t/ibf8OTrmAnpCypeC

Lighting (USA) for column stalk circuits... incomplete in some sections.

https://www.dropbox.com/t/kKAVQe32PXypLWqT

Windshield wiper/washer diagram for column stalk circuits:

https://www.dropbox.com/t/avNuRtlYS9y74aBW

Since some of the instruments are attached to the engine diagram...

https://www.dropbox.com/t/sS3tkr4VIA3ihoKT

And some instruments are attached to the alternator/battery...

https://www.dropbox.com/t/K97UXakO1rJ8rNXB

LOL... maybe I should have posted them all.

Anyway, let us know if you get into difficulties.