electrical bonding with light gauge wire between the engine or chasis to the body of a one wire O2 sensor is not necessary, and is generally not good practice because it becomes a possible fire hazard if the engine- chasis bonding strap fails. further, the O2 circuit is high impedance, and the output therefore isn't sensitive to small contact resistances and so on - although cleaning the threads on the exaust pipe with a tap and using plenty of copper anti-seize compound is a good idea. the real test is to measure the voltage between the body of the O2 snesor and the engine - and also between the engine and chasis. more than 10 mV or so would be worth investigating, and the greater the electrical load (lights etc.) the more snesitive is the test. On Sat, 25 Mar 2006 06:56:46 -0800, Evan Mac Donald <macdonald1987@SBCGLOBAL.NET> wrote: >Any body got any other ideas for attaching a seperate ground to a 1-wire O2 sensor? I don't want to trust the rusting exhaust system and its connections. The only permanent connection I can think of is to solder a lead to the outer housing, but I am afraid that even the upper edges get too hot, and will remelt the solder. Can a lead be welded on? How much heat is too much? I can braze a connection in place, if that won't destroy my shiny new sensor. > > And that raises another question. On a newer-style, self-heated O2 sensor, is the ground only for the heating element, or does the sensor also use that same ground? > In other words, does the sensor ground through the housing and then the exhaust system, or does it also use the ground for the heater? |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.