Oxygen Sensor, For the California Folks Options

[gfg3]

I have a '75 1.8 FI car that originated in California. This car originally had an O2 sensor, but now it doesn't. I'm looking to replace that O2 sensor. I've been told that the O2 sensor hooked into some sort of relay which then ran back to the computer. First, is that correct? Second, does anyone have a photo of the O2 sensor hookup from the exhaust all the way to the computer? If there really is a relay in this scheme I could also use a picture or description of that relay too. Once I figure out what I'm looking for I'll try to find the parts. Thanks.

George

[914work]

Indeed. the sensor was mounted in the Exhaust connected via a small acc. loom to a relay mounted just to the left of the R. deck latch which in turn plugged into the late main loom (w/taillights).
I dont have access to a pic but that's not the only parts involved.
Correct exhaust, CAT, EGR pipe from muffler to valve in Eng. bay. Trip meter in footwell, guage bezel with idiot lights, ect ect.
Late CA cars were *special*

[jcd914]

Indeed. the sensor was mounted in the Exhaust connected via a small acc. loom to a relay mounted just to the left of the R. deck latch which in turn plugged into the late main loom (w/taillights).
I dont have access to a pic but that's not the only parts involved.
Correct exhaust, CAT, EGR pipe from muffler to valve in Eng. bay. Trip meter in footwell, guage bezel with idiot lights, ect ect.
Late CA cars were *special*

This is close to being correct.
They did not have an O2 sensor but they did have a temperature sensor.
It would turn on a warning light on the dash if the cat got too hot.

The sensor was mounted and wired as described above.

It is not functionally necessary, these were not used by the fuel injection or any other engine controls. It was just for the temp warning light.
If you are still running a cat converter or want originality you might want one.

Jim