Alfa Romeo Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
249 Posts
Discussion Starter #1
I bought a new alternator for my sud and i went to replace my old one, but it has different connections. it has no metal connector tab where it says D+. There is a tab on the other side of the alternator with no marking. Is that the one to use?
 

·
Registered
Joined
·
1,459 Posts
Some alternators have connector terminal for noise supressor capacitor.
Could you post some pics of the new alternator?
 

·
Registered
Joined
·
249 Posts
Discussion Starter #3
here's a pic of the new one. It has a connector tab labeled EXC. What does that mean? is that in place of D+?
 

Attachments

·
Registered
Joined
·
1,459 Posts
EXC means excitation (external supply for the rotor through the voltage regulator) which is marked
with D+ on the Bosch alternators.
 

·
Registered
Joined
·
249 Posts
Discussion Starter #5
So the connector that is currently on the D+ with the old alternator goes on EXC on the new alternator?

Just want to be 100% sure so I don't end up blowing all the fuses.
 

·
Registered
Joined
·
1,459 Posts
Yes, D+ wire (as i recall it's green) should be connected to the EXC terminal
of the new alternator.

The fuses are safe even the D+ is grounded, because D+ is supplied through the
charging fault indicator bulb in the instrument cluster, and the current will flow
through the bulb. The "dangerous" one is the red B+ wire, it's connected directly
to the battery without protection.
That one shouldn't be earthed at any circumstances.
 

·
Registered
Joined
·
142 Posts
here's a pic of the new one. It has a connector tab labeled EXC. What does that mean? is that in place of D+?
That looks similar to the one I have in my sud but mine also has a spade terminal coming out of one of plastic holes marked d+. Out of interest where did you buy it as mine seems to be developing the same fault again that I thought had been fixed with a new diode pack?
 
1 - 7 of 7 Posts
Top