131mirafiori forum

I wonder if anybody can help me with the following problem:

I'd like to change a type 3 hazard lights switch to type 1. Problem is that first series are very different from type 2 and 3 switches. I just can't seem to figure out the wiring fitted to the switch.
Does anybody out there know how  to make the system work?
Thanks  :)

By 'type' do you mean 'Series' ? i.e. you want to fit a Series 1 hazard switch to a Series 3 car? If so, I suspect you'll need to fit a Series 1 hazard flasher unit as well.

What do you mean with flasher unit? And what is the difference in series 1 and 2/3?

Flasher is the relay that makes the intermittent signal of the alarm lights. Series 1 had also the signal light of the alarm on the button as series 2/3 had it on the dashboard.

Alright, so you mean the relay. But i have, what seems to be, a double switch. On the back side there are 7 connectors on the left and 6 on the right. Is it possible to connect the wiring in a way that i can use this switch?

So, there's nobody who can tell me hoew to re-plug the wires?

So which switch are you describing? Is that the S3 or the S1 switch and how many connections do you have on the other switch?

Assuming your S1 switch has as many connections as the wires connected to the S3 switch (maybe not all S3 switch terminals are connected) use the multi-meter to figure out what terminals connect when you switch the S3 switch and then use the multimeter to figure out where you should connect the wires on the S1 switch. If the S1 switch doesn't have enough connectors, then use just a single pair SPST (Single Pole Single Throw)  to switch a hard-wired relay to mimic the S3 switch. It's certainly possible  ;)

The series 1 switch is a double switch with 7 connectors on one side and 5 on the other. Series 2 has 7 connectors but differ very much from series one. I already tried to re-plug some wires but then the system doesn't work.
Also i opened the switches to see the inside. They are very different from each other.
I don't understand why series 1 is such a "big" switch. The basic cars (and the Stradale as well) had no hazard lights at all...

It's all to do with the type of flasher unit (or relay as you called it). That's why I suggested the easiest way to get the S1 switch to work is to use an S1 flasher/relay unit. Hazard switches have a lot of connectors (especially the older ones) as they disconnect the lights from the normal indicator unit, connect left and right together and connect them to a hazard flasher/relay unit. Modern cars have combined indicator and hazard flasher/relay units so the switch connections are much simpler. Some cars even have electronic units now so the hazard switch will have just two wires on it; could even be done with a single wire! I'm sure I could wire an S1 switch for the hazards on an S3 car but I'm sorry I can't give you specific details without having the cars to look at or detailed wiring diagrams.

Hazard lights are a legal requirement now but do not have to be retrofitted to old cars. I'm not sure when the requirement became law but my 124s never had them (until I fitted them  ;D) while my 1976 131S did. But I believe you are right that the 'plain' S1 131 didn't have them so the legal requirement must have started in the late 70s. So for sure your S3 CL should have them but if the Dutch authorities don't check them at the MOT test (or whatever they call it over there) then just put the switch in the dashboard to fill the hole and don't worry about it. It's a 131 mirafiori after all so it will never break down so you'll never have to use the hazards  ;D

 :D Yes, it won't break down. But there are so many other occasions when one has to use the hazard lights. My car is from 1981 and the hazard lights are supposed to work.
MOT is APK in Holland.

No worries, this week i will find out how to get them to work  ;)

Different from country to country. German law e.g. says that all cars, regardless of model year, have to be equipped with hazard lights (government rule from Jan 1, 1973), so retrofitting is mandatory; however, seat belts are only mandatory on cars first built later than April 1, 1970.

Well, i tried every combination. But both switches are so very different from each other. No single combination seems to work. Even tried extra wires. One time both control lights from battery and oilpressure lit up  ???

Nobody out there to help me out here? :-\

I think you need to study both wiring diagrams for the first and third series to see how each is wired.

You may need to construct a new loom for the hazards following the first series diagram and as Theo says fit a first series hazard flasher unit.

checked some available diagrams in haynes but they are difficult to read...
you need a colored marker to follow all the leads.
however, I only found a 7 and a 8 pin hazard switch, not the 12 pin you mentioned???
I think you should re-wire to a generich (stright foreward) hazard diagram using the new switch
basically the hazard switch should by-pass the indicator switch, directing the flasher relay signal to all 4 indicator lights
(powered by +30 (battary) in stead off +15 (ignition))

 correct me if I am wrong....

Hee Henk,

I understand how the system works in type 3 cars. It's quite simple. However,the switch from type 1 differs so much. It seems one needs both sides of the switch. Perhaps make a loop from one to the other. But for now i don't know wich points to connect.

is there a functional difference between the switches?
I mean, some swithes have illumination and a flashing mode if pushed (this sometimes requires extra pins)
or are the both the same in this regard?

Both sides have a different inside. I mean, when flipped different connectors are "on". Together with 7 pins on one side and only five on the other side. btw the 5 pins are all "on" when the switch is flipped. Looks like the hazard system is complete then. But then there is no indicator system. Same problem occurs when this side is used for indicators. Then there is no hazard system. And like i said, once i had the control lights from battery and oilpressure with the red hazard control light.....

like david and thotos said:  a switch with that many different unknown pins needs a decent wiring diagram and a multimeter.
Haynes is no good, did you check olyslager vraagbaak?

Henk,
 
I have almost every book available about any 131. However, i have no reach of them. Thought it would be easier to ask aroud here  if anyone had ever made this change. Seems i am the first one...for now.