Stefano, I've never seen this particular problem and it is quite mysterious.
So when the headlight switch is set to 1st Position, you read 13.3v at Fuse #5 (Trunk, hood, dash, parking, and side lights). and at the 2nd Position, you get 12.2v. The voltages sound like they should light the lights. You did this test with the fuse removed. What voltage readings on the two ends of the fuse do you get with the fuse in place? Did you check the other lights on the circuit to see if they went off when at the 2nd Position ? My first thought is that the fuse box is the culprit since a whole circuit is affected. Check all the wire connections on the back of the fuse box to make sure that they are clean and bright. Next look at the fuse holder tangs to make sure that they are clean and bright. My other idea is that something is going on inside the headlight switch such as old grease/dirt/schumtz on the electrical contacts. Might be that the electrical connection for Fuse #5 at the 1st Position are not the same ones when at the 2nd Position. I believe that you can open the switch for an inspection and a cleaning. Bruce > On my 74 GTV, when I turn the headlight switch to the 1st > position, my tail lights and running lights come on. When > I turn it to the 2nd position, the head lights come on, but > the tail lights and running lights turn off. Same in both Hi > beam and Lo beam. > > At the fuse block, with the fuse removed, I get 13.3 V to the > tail light circuit in the 1st position, and 12.2V in the second > position. > > I cannot find anything on the wiring diagram that can explain > why they do not stay on when the switch is rotated to the > 2nd position. > > Has anyone seen anything like this in the past? -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
