Mystery wires under back seat

Gotta love that wiring . . .
Arved
Posts: 21
Joined: Sun Mar 03, 2013 8:20 pm
Your car is a: Fiat Spider 2000

Mystery wires under back seat

Postby Arved » Tue Nov 14, 2017 11:23 am

Hithere, I removed the back seat bench and found two wires that coming from under the driver side door carpet.

One wire is white and black striped with the strips perpendicular to the length of the wire
The other is red and black striped with the stripes running along the length of the wire.

I cannot find a wiring diagram for a 79 carbureted car. If you can point me that would be fantastic. Also any idea as to what these wires were for would be great.

Arved

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howelljd
Posts: 45
Joined: Thu Oct 16, 2014 12:52 pm
Your car is a: 1980 Fiat Spider 2000
Location: Clinton, MS

Re: Mystery wires under back seat

Postby howelljd » Tue Nov 14, 2017 1:54 pm

I think that those are the driver seat belt chime wires but mine were on the floor immediately behind the driver seat rather than under the rear seat.

https://sites.google.com/artigue.com/fiat/electrical

Cheers,
Jonathan
Jonathan D. Howell, PMP
Lieutenant Colonel (USA, Ret)

1980 Fiat Spider 2000 "Pini"

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RRoller123
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Your car is a: 1980 FI SPIDER 2000
Location: PLYMOUTH, MA USA
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Re: Mystery wires under back seat

Postby RRoller123 » Tue Nov 14, 2017 3:34 pm

Could be power to the fuel pump.
'80 FI Spider 2000 (rolling "resto")
'74 X1/9 (many years ago)
'79 X1/9 (fewer years ago)
'86 Jaguar XJ6 (2nd Hobby Car)
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/SB
2015 Keystone Montana High Country 343RL

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baltobernie
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Joined: Sun Nov 25, 2007 6:00 pm
Your car is a: 1973 Spider
Location: Highland, MD

Re: Mystery wires under back seat

Postby baltobernie » Tue Nov 14, 2017 10:32 pm

Power radio antenna?

Arved
Posts: 21
Joined: Sun Mar 03, 2013 8:20 pm
Your car is a: Fiat Spider 2000

Re: Mystery wires under back seat

Postby Arved » Tue Nov 14, 2017 11:17 pm

RRoller123 wrote:Could be power to the fuel pump.


My car came with a mechanical fuel pump...

Thanks Arved

Arved
Posts: 21
Joined: Sun Mar 03, 2013 8:20 pm
Your car is a: Fiat Spider 2000

Re: Mystery wires under back seat

Postby Arved » Tue Nov 14, 2017 11:18 pm

baltobernie wrote:Power radio antenna?


Interesting idea. Let me check if there are other wires for that with the antena.

Thanks

Arved

Arved
Posts: 21
Joined: Sun Mar 03, 2013 8:20 pm
Your car is a: Fiat Spider 2000

Re: Mystery wires under back seat

Postby Arved » Tue Nov 14, 2017 11:20 pm

howelljd wrote:I think that those are the driver seat belt chime wires but mine were on the floor immediately behind the driver seat rather than under the rear seat.

https://sites.google.com/artigue.com/fiat/electrical

Cheers,
Jonathan


Wow thanks for the diagram. I can't find that color code anywhere there though. What you say seems reasonable as the seatbelts receptacles were replaced with some that do not have a sensing unit, which would leave the cables dangling.

Thanks

Arved

spider2081
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Your car is a: 1981 Spider 2000
Location: Wallingford,CT
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Re: Mystery wires under back seat

Postby spider2081 » Wed Nov 15, 2017 7:02 am

I have a 1980 wife diagram with colors. It shows a pink/black and a white /black wire going to the drivers seat belt switch. So I think the previous suggestions of Seat belt system are correct.

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baltobernie
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Joined: Sun Nov 25, 2007 6:00 pm
Your car is a: 1973 Spider
Location: Highland, MD

Re: Mystery wires under back seat

Postby baltobernie » Wed Nov 15, 2017 7:36 pm

Do you have a wife diagram for a 1974 model? I sure could use one!

spider2081
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Location: Wallingford,CT
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Re: Mystery wires under back seat

Postby spider2081 » Wed Nov 15, 2017 10:23 pm

People have been trying to make "wife" diagrams for centuries. As far as I know none are accurate.

spider2081
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Re: Mystery wires under back seat

Postby spider2081 » Wed Nov 15, 2017 10:30 pm

Sorry for the bad joke.

I use the 1974 wire diagram on Mirafiori.com. You have to join the site to access the library where the wire diagrams are. After you log in select "library" the "124" then Wire diagrams and scroll down for the 1974. Its a 2 page diagram so I printed it and taped the pages together.

PeterCecil
Posts: 4
Joined: Sun Oct 29, 2017 9:49 pm
Your car is a: 1979 2000 Spider

Re: Mystery wires under back seat

Postby PeterCecil » Thu Nov 16, 2017 9:03 pm

Arved, greetings. I have just replaced my seat belts and the two wires you described were connected to the driver side seat belt buckle receptor.

Arved
Posts: 21
Joined: Sun Mar 03, 2013 8:20 pm
Your car is a: Fiat Spider 2000

Re: Mystery wires under back seat

Postby Arved » Fri Nov 17, 2017 3:00 pm

PeterCecil wrote:Arved, greetings. I have just replaced my seat belts and the two wires you described were connected to the driver side seat belt buckle receptor.


Amazing, thanks!


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