O2 sensor

[chavo6723]

I am looking for the fusible link on the o2 sensor that comes off of the ignition switch. I found the grey and yellow wire from the ignition switch. It's a 12 gauge wire with no fusible link. The schematics say it needs to have a 20 gauge fusible link on it which is odd. The 12 gauge wire goes to a connector then drops to 18 gauge wire that goes to the sensor. Looking for input on this.

 

[franklin2]

Supposed to be on the driver's side inner fender. It looks like a piece of rubber in the wire.