Right you are Mike.

 For you gadget freaks out there I sell a device that continuously monitors the
O2 sensor. It gives a constant visual representation of the output voltage with
a moving dot display. Small enough to fit in the blank under the Hazard switch.
See http://neksiwel.20m.com/ . $20 plus $2 shipping.
Ken Lewis

Quoting Mike Frost <mafrost@GMAIL.COM>:

> I wouldn't be surprised if these cables are bad or about to go bad in
> many (most?) vans of this era. The way it was terminated by the
> factory, it is almost guaranteed to fail with vibration over time. I
> recommend EVERYONE check for this.
>