131mirafiori forum

At the moment I'm totally lost. Wanted to fix the electrical problems, as are:

- city lights are not working, only with the light swith on drive lights (switch fully pressed)
- hazard light not working (absolutely not) while indicators work perfectly
- headlights not working (no power on the lines)
- some lines that lead into the central electric should, from my understanding, be live wires. However, they are not, doesn't matter if ignition is on or off?

I have the original Fiat circuit diagram, however this contains no color code for the lines. And the second diagram I have seems totally useless.

I am not into electrics, so at the moment I am at my wit's end. Does anyone have a comprehensive circuit diagram? (Series 2 model).

The indicators and the hazzard warning lights use different control units (relays) so the fact that indicators work means nothing about the hazards. It does however mean that the wiring to the bulbs is correct and working so check the hazard flasher unit (somewhere under the dash but I can't remember where).

The fact that you have several electrical faults and power missing from several wires would make me suspect the fuse box as every connection goes through there.  Take the fuse box out and ensure all the multiplug connectors are in the correct place and seated properly.

What was the last thing you changed / worked on, before this happened?
Or it just happened out of the blue?

The car had been taken apart completely, and I assume when putting it together again several electrical problems occurred and were not noticed and thus not been taken care of. So, I have to start from this point, without knowing what went wrong.

One complete day of drudgery and the electrical problems are ... solved. However, one mess leads to another and I had to change the starter, because the connector for the small cable broke (can be soldered I assume, but I had a rebuilt starter in the garage anyway - so I can take care of the broken item one day). Awful work if you do not have a car lift at your disposal :(. Most problems were due to the fact that the live wire from starter to fuse box was not connected. This fixed, all circuits except the drive lights worked (high beam ok!) - this was due to a bad wire connector that I fixed by simply cleaning it thoroughly. So, now the drive lights would work too - however, I will connect them via relays to get better lighting (had this already before, but now I will use even thicker lines and route it properly). Will make the wiring tomorrow or on Sunday. By the way, connecting the lights via relays is something I strongly advocate for every Mirafiori out there  ;D

So, one issue solved, others to come...

Good to hear you got it all sorted.
My auto sparky also did the same & fitted relays to solve the poor lights, replaced all the spade connections replaced most of the head light cables in the engine bay. Also fited a good quality relay to the wiper circuit he also fixed my brown wire problem.Also as Theo said we found at least 3-4 loose wires in the fuse box & fuse box wiring.Replacing both earth cables with new cable and crimps also made a big improvment for me the car starts much better now.
As he said fixing the problems is the easy bit, its finding the fault thats the problem.