The wires are copper. - Saab 9-5 Bulletin Board - Saabnet.com
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Definitely copper. No aluminum wires in these cars.......never heard of it in any car.
I have done 4 of these j16 repairs. The last one in the 2000 Aero wagon I am restoring and I did it just to be sure it does not happen later.
The ground wires from both O2 sensors are joined together and one black wire comes out the other side and goes to the ECU connector. The joint is crimped with a brass crimp and then covered with a sealant like hot glue, and are in a heat shrink tube. The glue is probably in the tube before it is heated.
The theory is that in spite of all the sealing that the brass and the copper have a dissimilar metal corrosion problem. Remember that the max voltage in this system in 1 volt. So the connection has to be VERY good.
It is a simple repair if you know how to solder.
the connection is buried in the harness so you must remove the zip ties. Look for a black wire coming out one side to the ECU connector. the other end had a grey and a blue wire going in.
Solder it and use heat shrink tubing to seal it.
2000 95 Imola Red Aero 5 door stick - my ride
2003 95 Black Aero 4 door auto Mary Ann's car
2004 95 Black Aero 5 door wagon
2001 95 Silver Aero 4 door stick
2001 95 Silver Aero 5 door wagon automatic
1999 95 Combi stick
1997 9000 Aero stick red
1988 900 SPG black
1988 900 Convertible black
1985 900 3 door turbo spg kit silver
1979 900 3 door turbo early 900 production
1966 96 2 stroke red
1960 95 wagon red
1959 93b light yellow
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