Seat Belt/Door Open Buzzer Wiring (USA, Canada, Japan)

Folks, I've been trying to figure out the wiring and operation of the Seat Belt/Door Open Buzzer module under the dash (near the driver's knee on the centre console side). I don't have a USA car, so it's for general interest only. The Ferrari part number is 61830700 and the module may be labelled Segnalatore Acustico.

https://www.ebay.com.au/itm/Ferrari-328-GTS-Seatbelt-Warning-Buzzer-61830700-J082-/382489379574

I got stuck trying to do a pinout for the plug on the module. The module is shown on numerous pages on the somewhat incomplete Ferrari wiring diagrams (as item 06625) .

The plug has a non-standard numbering system with the even numbered pins on one horizontal row and the odd numbered pins on the other horizontal row. 1, 3, 5, 7 and 2, 4, 6, 8.

Pin 1: White-black wire - linked to passenger door open switch
Pin 3: Don't know the wire colour (if there is one).
Pin 5: Wire may be pink - related to brake warning light test during engine start
Pin 7: (no pin on module, so I assume no wire)

Pin 2: Brown-white wire - linked to driver's door open switch
Pin 4: Wire may be pink-yellow or yellow-blue (not sure)- possibly related to the seat belt
Pin 6: Black wire - related to brake warning light test during engine start (earth wire)
Pin 8: White wire - related to brake warning light test during engine start (power wire but only during engine start)

Would someone with some free time be able to take a look at the wire colours? Thanks!

Here's the incomplete diagram for the "door open" side of the module (5.2 car) :

Figure 10 Wiring Diagram

Regarding operation: Does the module buzzer have its own power source or does power comes from user systems (e.g via the door and seat belt warning lights? i.e. fuse 30 > door open light (on door), buzzer module pin 1 (or 2) > buzzer speaker > earth pin (?) on module.

Thanks
Cheers

 

Ah... I forgot about this message thread... Some clues on wiring here:

https://www.ferrarichat.com/forum/posts/144748714/

I see two wires going into one pin (which explains some of my confusion).

 

Can't make any sense of this at all. The colours in the photograph are not matching the pin numbering on the real unit or the pin numbers in the wiring diagrams or the pin numbering Alex used.

Here are the pin numbers on the unit (see last picture):
https://www.ebay.com/itm/Ferrari-328-355-Others-Seat-Belt-Brakes-Warning-Buzzer-Part-61830700-/131849060167

They may be different to the socket numbers on the plug (car side). For example, Alex called the pin with the yellow/blue wire on it "pin 1". That's actually pin 2 of the unit. The wiring diagrams assign pin 2 to a brown-white wire. The wiring diagram colour for unit pin 1 is not legible, but may be a white-black wire.

Hopefully someone can provide some accurate pin numbers and colours.

 

Thanks, Wade.

I just had a look at my non-USA, Can, Jap module. It has 5 pins on the module and 5 wires (on a 9 socket plug). It has a small speaker grille, but I don't think it's active on Australian cars. The seat belt has no input into the module. I don't even know why the door open wiring goes through there (unless it's using the diode in the module or Ferrari was aiming for some commonality of wiring harnesses).

 

No problemo ) Thanks, guys.

 

Sorry, Paul, I've forgotten if your car is US or UK conversion.
I'm more confused than before. As far as I know, there are only two kinds of "brake warning light and door/seat belt buzzer modules" These are shown in parts manuals and the plug is always part of the module, not on a long harness.

Does your car have a buzzer for doors and seat belts? Seat belt wires are typically yellow with blue stripe and/or pink with yellow stripe. You have neither of those colours.
Typically, the brake warning light side of of the module uses 3 wires which are white, pink and black. These do not correspond to any one side of your plug (unless you've misidentifed the red wire... Could it be a dark pink colour?).

Green (with white stripe) wires are generally power from the "AC System" fuse. My car and Alex's car (in the other thread) doesn't have any green/white wires going to the module.

Can you see the part number on the buzzer? Maybe the harness if for a different buzzer or something else? The buzzer is usually located under the dash, not in it. I thought you might have found the turn signal acoustic repeater (found on earlier cars), but that has different wire colours. I've checked every wiring diagram and there is nothing like that plug.

Sorry that you had to dismantle your car. Those vents are fragile. Please be careful with it.

 

Yep... I just realised, too. A good find, though. I'll add those plug-to-sensor colours to my HVAC diagrams

F355 (5.2) HVAC wiring diagram

F355 (2.7) HVAC wiring diagram

 

Thanks, Grant. Seems to be different to my Aussie car. I assumed the setup would be symmetrical on LHD/RHD cars.

 

It seems Paul's is a non-buzzing type like mine. Any other volunteers to go looking for the wiring colours and pinout for the buzzer type?

https://www.ferrarichat.com/forum/posts/144748714/

Here's a borrowed photograph from the link above showing the (seatbelt/door) buzzing type...

Image Unavailable, Please Login

I can't see all the colours.

Thanks.

 

I'm wondering if you have one at all, Paul. As far as I know, the "buzzer" unit on Euro and Australian cars just does two things:
1) illuminates the brake warning light during engine start/crank (i.e. the [(!)] symbol)
2) links up the left & right door open switch switch circuits to provide a single input into the door warning module (to put on the interior lights).

If you don't have the brake warning light during engine start function on your "hybrid" car, maybe you don't have a buzzer unit. I guess the door open stuff can be hardwired in (All you need is a diode to simulate normal F355 functionality). If you don't have a diode, opening the one door only, will illuminate both door lights (i.e. the lights on the doors).

 

Nope... Try again. That's the turn signal acoustic repeater (found on cars up to assembly number 24037). I think it just makes the turn indicator clicking sound louder.

Ferrari part number 157498

Thanks anyway. At least I know where it is if someone asks me. I'll add the location on my wiring diagram.

Cheers!

 

I just confirmed on my car that when I open the driver's door only, both driver's and passenger's "door open" lights come on. When I open the passenger's door, only the passenger door light comes on. This is because of the diode in the buzzer unit (shown in the wiring diagram). Paul, if your car operates like this, this shows you have a buzzer unit somewhere (with an inbuild diode). Although, during your LHD~RHD conversion, they may not have swapped over your door wiring (in which case, opening the passenger door may put on both lights and opening the driver's door may only put on the driver's light)

If you have no buzzer (and no unique-to-your-car added diode), opening up a single door will only illuminate that respective door light. If this is the case, then the alarm won't trigger if you open the driver's door (or the passenger door if your wiring wasn't reversed during your LHD~RHD conversion)