348 turn signal problem

I don't think the problem is in the flasher relay because the same output (pin) of the relay flashes the Left and the Right side as well as all indicators when the hazrd switch is "on". In other words, if the flasher relay flashes one side, it is good. How's the operation of your hazard lights?

I suggest you check the multi-pin connector of the column switch then the contacts of the switch itself. The wire for the right side indicator lights, section from the indicator switch to the connector, should be Light Blue.

 

Look from the switches on the steering column and further down the column. You will probably have to remove the covers around the steering column, maybe the steering wheel as well. I have not done this work on my 348 so I cannot give you exact instructions. Serch the forum. If you google for the 348 column switch, you will see pictures of it which will give you the idea of what is involved.

 

Are you saying the right side is not illuminating at all when using the column switch, or illuminated but not flashing? Is your arrow symbol illuminating?

Because your latest message says that you can hear clicking, the steering column switch should be working, although I'm not sure what effect a high resistance switch contact would have.

 

How accessible is this connector on the steering column?

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In theory, you could short out some wires on this plug to prove/disprove a faulty switch. i.e. any of the blue only wires to the white/black wire on the car side of the connector. i.e. not the blue wires with black stripe.

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e.g. pin 3 to pin 6 with the ignition on.

The plug may look like this (looking at the face of the plug, not the wire side), although it's hard to tell from the photo.

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Maybe Miro has a better photo?

 

Actually, that may not work, as jumping those two wires on the "car" side will only provide power to the front flashers. You would have to jump all the blue (only) wires to the white/black wire.

 

The indicator switch seems to be detachable from the cluster as there appear to be four screws on it (detail from picture at Maranello Parts):
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If it can be detached, then its contacts can be inspected/cleaned.

Picture of the other side of the cluster shows the LightBlue (RH indicators), LightBlue/Black (LH indicators) and Whte/Black (to flasher relay) wires entering the opening below the indicator switch:
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With regard to the Italamec Flasher Relay (not at fault in this case), it can be replaced with any 3-pin flasher relay as long as its pinout is the same as that of Italamec. Italamec pinout:
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Examples of aftermarket flasher relays (that are also suitable for LED bulbs) with same pinout:
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Hella 3-pin flasher relays appear to have the same pinout as Italamec.
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Correct. There was a recent post on this. The flashing is simply triggered when the flasher output circuit senses a change of resistance (i.e. when the bulbs are connected to the circuit when the column stalk is moved)

https://www.ferrarichat.com/forum/posts/149316153/

That is a somewhat long and confusing thread on a flasher problem. We don't have a diagram for USA cars which complicated the thread somewhat. By the way, where are you from? You may be able to help us understand the USA bulb configuration.

The lamp is in parallel with the stalk switch wiring. It probably isn't illuminating.

 

The flasher relay will start flashing when a load (indicator bulbs) is connected to its Pin 49a. If, in indicator mode, the load is less than a minimum expected, like when one of the 21W bulbs is out, the flasher will flash at double speed. In your case, the RH indicator bulbs are all good since they flash in the hazard mode. The fact that the flasher relay is clicking in the RH indicator position suggests that you have high resistance somewhere along the route from the RH contacts in the indicator switch to, and including, the pins 3 and 10 of the multi-pin connector. The high resistance could provide just enough load on the flasher relay to make it start clicking but prevent lighting-up of the indicator bulbs.

Pin 3 of the connector is for RH Front and small side indicator bulbs; Pin 10 is for the RH Rear bulb and the warning light in the instrument cluster. Since it is unlikely that both pins 3 and 10 develop resistance at the same time, are you sure that neither front/side nor rear indicator bulbs are flashing?

If neither front nor rear indicators are flashing (while the relay is clicking at double speed), then it is more likely that the problem is at the "R" contact (Light Blue wire) of the indicator switch.

 

Ooops... Looks like I mislabelled my wiring diagram again.

Corrected here (and added a plug graphic):

Euro: https://www.dropbox.com/t/c6fF48CexdVE5UOA

I've added these letters to the lines
f = front
s = side
i = instrument panel
r = rear

 

Good man, cheers for this.

I just got my 348 back from it's major service and the flasher can was sticking, but after I used the indicators around 10x times it came good lol.

Good to have this information but, thank you.

 

Bosch flasher relay that can be used (same pinout as Italamec). It comes with a bracket.
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