Hi John, hi together, I apologize upfront, as being quite new on this forum. Really dont want to be a smartass here. But why dont you just track down the problem. We are talking about lights/turning lights, switches, relays, and some cables (no rocket science involved here ). One or two words ahead about the turning light relay: Normally you would expect to hear the typical click--click--click.... . Unfortunately the click is induced by the current going to the turn light. So actually the relay is closed, you switch on the turn light => Current is flowing through the turn light (light is on) and heating up a bimetal. When the temperature is high enough the bimetal bends away and the circuit is interrupted => Light is out, temperature is falling, bimetal is bending back => rinse and repeat. So if there is a bad grounding you probably will not hear the click---click---click. Which gets me to the main point: Relays fail, but quite seldom: So (especially regarding Italian cars, but also american and (i shamefully admit) even german cars) first idea would be grounding (as mentioned earlier in the thread). Easy to check. Get yourself the wiring diagrams. Take a test lamp (or build one, take a light bulb from the head lights and solder two cables to it). Check the ground connections with the test lamp. It is important to check with a load (the lamp), a DMM (high resistance) might tell you everything is fine without load. But the light bulb will not lie. If it is flashes up shiny and bright everything is fine, if it glows a little bit => Gotcha, bad connection. When you are sure grounding is fine, then check the power supply points. Of course also with the test lamp. A DMM (again, high resistance) may tell you: Yes, there are approx. 12V. But if you put load on it (use the test lamp) the voltage might break down (resulting in a shimmering glow of the bulb). If you are sure the power supply and the grounding are fine, simulate the switch by connecting the cables (wiring diagram) which induce the turn light directly. If everything works fine => switch is the bad guy. If not, check (if you can/otherwise replace) the relay. Still not working (what I seriously doubt), start from the beginning. Seriously, it is an annoying work, been there and done that, but in the long run it is fastest way to get things work again. From my experience with my cars (oldest one is a Porsche 356C Convertible from 1964) I agree with the guys who suspect some problems with grounding. But again, just check it step by step. Good Luck, Dirk
