Found a Jumper... back to IGNITION SWITCH where have to go?

[maaxx]

Hi Guys,
i need a small help for my 1980 2000FI..with SIPEA ignition sw
after cleaning and restoring back and below the dashboard, something was not working properly with IGN key in Run.
I discover that terminal back to the ignition switch was loose and just by move a little the rubber cover I inadvertently disconnect somecable from IGN SW ,
With my surprise one of this was a jumper, but I'm not sure about it's function and where is it right.
And also cable colors are different due to a some past reworking ,

I assume that this list it's the right way to connect terminals
50 to STARTER SOLENOID _____________________
30 from BATTERY (HOT)_______________________
30.1 to FUSE box for main supply in RUN__________
INT always supplied line for parking lights_________
15/54 ignition coil_____________________________
16 no connection_____________________________

So problem is that there is a jumper cable , one side is connected one of 30 (was remained in ..so i can see)... and the other side?....
I CAN IMAGINE AT ONE OF 15 BUT BEFORE IS BETTER TO ASK

[spider2081]

I find Fiat publication " Spider 2000 Electrical Diagnostic Manual 1980-1981" very helpful when troubleshooting fiat electrical issues.

Its available on NJfiats.org and Mirafiori.com. You have to join Mirafiori to access their library to use the manual.

First the original Sipea ignition switch for your car would have had a pigtail and a 6 cavity connector with 5 cavities used. The ignition switch did not have a terminal 16. If your ignition switch has push terminals and a terminal 16 its from an earlier Spider.
Looking at your photo I don't believe that is the original ignition switch. Also I can't make out a brown wire in the photo.
The Sipea switch terminals function and wire colors are as follows.

30 power into switch from starter solenoid battery terminal Brown
INT switched power out of switch from terminal 30 to mostly light circuits. Blue or Blue/black
50 Switched power in "start" from terminal 30 to starter solenoid Red
30/1 Power into switch from alternator output post. Black. Note Alternator connects to fuse 10 first jumps to 9 then to ignition switch.
15/54 switched power out from 30/1 to ignition coil Pink.
Switches that have a terminal 16, 16 is powered from terminal 30 in the start position only and is used to operate the dual point system. A 1980 car should not have points.
Note: Some people jump the black and the brown wires together so all the internal switches in the ignition switch share the same power sources. Could that be the jumper you mention?

If you check with a test light or a volt meter the black wire and the brown wire should power as long as the battery is connected. They are the power into the ignition switch. The ignition switch has 3 separate internal switches activated by the key. The brown wire feeds 2 and the black wire feed 1.

Hope this helps

[maaxx]

thanks for reply
I have already look on the schematic from mirafiori site
16 is present and not in use, so i think IGN SW was replaced with an earlier model.
unfortunately wire colors doesn't match any wiring, replaced too.
Only brown and Red, but it's easy to identify,
was just about jumper
..probably was from one of 30 to one on 15 (both are double) and
for your experience..do you think is a good solution to preserve switch?..or better to remove and that's all?

the switch is exactly what you cas see here on top
https://www.vickauto.com/newstore/images/wires.jpg

[spider2081]

I think the original Sipea switches are a better product than the Lada replacement switches.

I assume that this list it's the right way to connect terminals
50 to STARTER SOLENOID _____________________
30 from BATTERY (HOT)_______________________
30.1 to FUSE box for main supply in RUN__________
INT always supplied line for parking lights_________
15/54 ignition coil_____________________________
16 no connection_____________________________

50 to starter solenoid That is correct
30 from battery (hot) that is correct
30.1 to fuse 9 from battery (hot) This wire should originate at alternator output post and then go to fuse 10 witch jumps to fuse 9 these 2 fuses protect the "hot all the time" circuits in the car. This should be the second power input to the ignition switch not an output.
INT switched power from 30 to head light switch for headlights and parking lights when ignition switch is in the "run" position
15/54 ignition coil that is correct.
There is no jumper required for stock wiring.
The jumper in the photo appears to be connected between the spare terminal 30 and 30.1 If that is the case If that is the case then the wire powering terminal 30 is also powering terminal 30.1 Yoour list of assumed connections show 30.1 a separate wire not a jumper.

[maaxx]

Saturday I'll back from London and i will try to reconnect the switch...
and I'll make an experiment to connect jumper from spare 30 to spare 15 if I understood correctly this can save hi pick power on switch itself .
and obviously i remove terminals. Soldering is the best solution to avoid again disconnections.
thanks again i appreciate

[spider2081]

I'll make an experiment to connect jumper from spare 30 to spare 15

I think Fiat originally used 2 power wires to feed the ignition switch for more than just redundancy. I think it allowed for a smaller diameter wire to connect to the switches terminals. This extends the life of the spade terminal as 2 are used instead of one.
Soldering the wires to the ignition switch would make replacing/repairing the switch very difficult. I would try and get the car back to its original configuration that way you or anyone else can you Fiat wire diagram for future service. My car is an 81 with 188,000 miles on it. I replaced the pigtail 6 cavity connectors about 7 years ago (30,000 miles) and have had no issues since. I'm thinking someone extended the original wires using what colors they had to reach the existing switch. If you follow the wire back a short distance you might fine the original wires of the proper color. There may even be the original 6 cavity female connector still in the car.

I did also install relays for the headlight and starter circuits and keep that wire diagram in the glove box with owners manual.

[maaxx]

finally my baby back to run!
Just to explain... ignition switch is connected differently... wiring system was reworked and modified on the past... so I found the alternator directly connected to the battery cable at starter and from here one hot cable go to the ign sw... other to the fuse box directly
and fuse box is divided by two main fuses in hot and run section
I decided to leave system like this...
thanks again for your help!!

now after first eng run I just to identify a right method to remove air from cooling system after coolant replacement .. as soon open the termovalve... fluid back to the reservoir and no way to remove air from upper tee drain
I will try to fill upper tube from the tee air drain