Quavion, you're amazing! Some super combination of an angel bringing blessings to the needy, a sage making complexity understandable to the simpletons, an artist creating a masterpiece and a good guy. Thank you!
I should have mentioned that the alternator/battery wiring is for the very late cars with this kind of plug near the rear left hand strut... Image Unavailable, Please Login ... not a circular plug like this: Image Unavailable, Please Login
The wiring diagrams don't really show which wire does what, but here is the diagram anyway. https://www.dropbox.com/t/ezmzctxHfnh3VhWp It may not be applicable to a Spider if you have one.
thanks!! Yes, it's a 348 Spider. The car has been sitting for 20 years, and none of the mirrors work... perhaps the motors, the wiring, or most likely the switch.
Assuming the wipers and brake lights work, I would check for 12 volts power on the blue/black wire (from fuse #6).
Can you explain this further? (I don't understand much about it.) I tested the switch and it works fine, with power on both sides. If power reaches both motors, I understand that they are bad... and would a bad fuse cause them not to work?
A single fuse powers the mirror switch, wipers and brake lights, so if there was a mirror power issue only, it would be on the wiring going to the mirror switch (or the power coming from the mirrors switch (on the red wire). The mirror switch sends power to the mirror motors on the red wire (possibly at all times). No, if the fuse was bad, the wipers and brake lights wouldn't work. So power is going into the switch (on the blue/black wire) and power is coming out of the switch on the red wire? The other switch contacts are earths/grounds when the switch is moved. Speaking of grounds... the doorlocks and window switches have common grounds. I assume these are working also? I'm not sure if the wiring diagram is correct for the red wire. Are there two red "R" wires on the mirror switch (on one pin of the mirror switch)? Image Unavailable, Please Login The diagram shows two wires joined at the mirror plug, but that seems a strange place for the wires to be joined.
The problem is solved, it was the switch, I opened it and cleaned/greased it again and both work perfectly Thanks for your help
I actually meant the red wires, but your photo shows me that the Ferrari wiring diagram is incorrect. There are not two red wires on the mirror plug. Thanks for the update. Glad you got it sorted.
