348 Turn Signals stopped functioning. Relay?

Before getting any deeper into things, try this simple test - just turn the hazard flasher on for a few seconds, turn it off, then try the turn signals again. It's possible that's all it will take!

 

Anything else not working? Hazards? Reversing lights? Do both left and right turn indications not work?

 

Good point. For turn indication purposes, the power from fuse 7 (in the passenger footwell) going to the flasher unit comes via the "normally closed" contacts of one of the hazard control relays ("208" in the wiring diagram) in the vertical section of the centre console. If the contacts are bad on this relay, the flasher unit might lose power.

If the flasher unit is relatively accessible on the 348, you could remove it and, with a DC voltmeter check for 12 volts coming in on the brown wire (to the plug of the flasher unit). i.e. with the ignition switched on.

http://www.iinet.net.au/[email protected]/Ferrari348/NoTurnSignals.gif

 

The fuse should be ok because it also powers the reversing lights. From your update, I'd say that the flasher unit and the hazard relay are still suspects.

Note that I'm not sure of the location of the hazard relay (1 of 3). I'm just relying on the wiring diagram.

Anyway, check for voltage on the flasher unit socket and, if present, the flasher unit (as you suspected) will be the most likely culprit.

Cheers
Ian

 

Further info:

I see that the 3 hazard light relays are on the back of the main switch panel on the vertical section of the centre console

Ferrari 348 Console Push Button Switch / Panel # 157152 | eBay

If the flasher unit is not getting power, one of the 5 pin "SIPEA" hazard control relays will probably be at fault. It will be a common "changeover" type of relay.

 

There are two mini relays fitted to the back of the that panel for the indicators, one for the left side indicators, and one for the right side indicators - They can fail and they're not available separately. My left hand side had failed indicator mini-relay had failed and so I had them replaced with a standard indicator relay to do both sides together.

The hazard light relay is not on the back of that panel, but is fitted under the passenger's side dashboard in LHD cars in the foot-well behind the carpet ,or drivers side in RHD cars.

 

Thanks, Phill. Just to confirm, you mean the hazard relay labelled "208" in the diagram and not the flasher unit (labelled "86")?

I wonder why the wiring schematics show the 3 hazard relays in the vertical console.

http://members.iinet.net.au/[email protected]/Ferrari348/NoTurnSignals.gif

Looking at the diagram, 208 controls the power source for the flasher unit 86 (either fuse 7 or fuse 16), 209 controls the right hand side flashers (for hazard) and 208 controls the left hand side flashers and the "hazard on" warning light on the console.

 

Any update on this? Did the flasher unit fix the problem?

Cheers
Ian.

 

Hey Phill, also have this problem and it’s the right side relay that’s the problem... they are unavailable “sipea 1682” how or where did you get them both L/R replaced and with what? Trying to rebuild this is going to be difficult at best!!


Thanks in advance!!

Barret