This mini project is about fitting an Alfa Romeo 166 electrochromatic ( auto-dipping ) rear view mirror to a GTV/Spider.
Difficulty : It's a doddle*. Really.
* This is based on cars imported by Alfa Romeo UK to the UK. Other cars are probably OK as well but complications may arise if the car is fitted with the factory remote door locking ( the one where a dome hangs down behind the GTV/Spider rear view mirror ).
1. An Alfa Romeo 166 dipping rear view mirror AND the wiring cut from the donor car's loom ( EDIT Dec 2012 : BUT see Stixy's post further down http://www.alfaowner.com/Forum/5018403-post14.html (Mini Project : Auto dipping rear view mirror)
about sourcing the correct connector to make your own wiring ).
2. Connectors to connect the two/three wires to the GTV/Spider
First of all, ascertain you have the wiring available behind the courtesy light.
Remove the courtesy light unit and unscrew ( 3mm allen ) the plastic base. Look inside the plastic base. If you have a circuit board with 6 wires connecting to it, congratulations, you've found the wires but there may be issues. The circuit board is the factory remote door locking device ( N67 ). This will not be present on officially imported UK vehicles as they were fitted with Scorpion/Meta alarms which also do the remote door locking. If you do have an N67, either tread carefully or you may have to run some new wires from behind the dashboard up the 'A' pillar and across to the courtesy light area. However, as the 166 dipping mirror only takes between 40mA ( undipped ) and 190mA ( dipped ), you're probably OK tapping into the wires at N67. But you're on your own there!
If you don't have an N67 have a ferret around with your fingers where the courtesy light wires pop out. You will find up to two connectors on a GTV ( only one if you have a sunroof ) wrapped in foam. I've no idea what you'll find on a Spider, except the N67 connector should be there somewhere! On P2 & P3 cars you should also find the Telepass connector. Unwrap the connector with 6 wires and if you don't have a sunroof, tuck the other connector(s) back in the roof space.
These are the connectors ( with the N67 connector removed from its foam ).
The white connector with the 6 wires is the one you want.
All that needs to be done electrically, is connect the PURPLE 166 mirror wire to the Blue/Red GTV/Spider wire ( Ignition switched +12v ) and connect the BLACK 166 wire to the Black GTV/Spider wire. The third 166 wire ( Blue ) is for the reverse gear disable. If this wire is connected into the reversing lights circuit, the mirror will undip when reversing. That is optional if you can live with a possibly dipped mirror when reversing.
Do NOT be tempted to wire the mirror to the RED GTV/Spider wire. That is permanent live and the mirror will discharge your battery!
Addendum Jan 2013
For P2 & P3 cars, an alternative power source may be available by using the Telepass connector. See alexGS's post here - http://www.alfaowner.com/Forum/alfa-...ml#post5131250
NB : Ultimately alexGS could not get this to work with the Telepass connector.
As to the mirror itself, it is a lot wider than the GTV/Spider mirror. But it still fits between the sunvisors.
The GTV/Spider mounting is a lot shorter than the 166 mounting
Don't be tempted to swap the mounts over ( it is possible ). If you do the 166 mirror will hit the courtesy light fitting and you won't be able to see out of the back window!
You'll need to cut a small hole in the courtesy light base to allow the mirror wiring to exit to the mirror.
That's about it.
Here it is fitted to my GTV
One final thing. You remove the GTV/Spider mirror by sliding it up towards the roof. Do not use a lot of force. It can break the windscreen. Be gentle.