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71-72 speedo switch 3438494 #844309 11/02/10 03:04 PM 11/02/10 03:04 PM
Joined: Jan 2003 Posts: 28,067 Irving, TX feets OP Senior Management
feets OP Senior Management Joined: Jan 2003 Posts: 28,067 Irving, TX	Does anybody have any info on how this switch works? Just the switch itself. Does it turn on or off at a specific speed? Does it send a continuous signal based upon the rpm it gets from the transmission? We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: 71-72 speedo switch 3438494 [Re: feets] #844310 11/02/10 04:49 PM 11/02/10 04:49 PM
Joined: Jan 2003 Posts: 25,823 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,823 Rio Linda, CA	That's part of the NOX system, it supplies a ground signal to the control module when the road speed hits approximately 40 mph. There is also a cowl-mounted temp sensor that's part of the NOX system which retards the spark at speed. The INTERNET, the MISinformation superhighway

Re: 71-72 speedo switch 3438494 [Re: John_Kunkel] #844311 11/02/10 04:53 PM 11/02/10 04:53 PM
Joined: Jan 2003 Posts: 28,067 Irving, TX feets OP Senior Management
feets OP Senior Management Joined: Jan 2003 Posts: 28,067 Irving, TX	40 mph isn't a bad. That's fast enough for converter lockup. That switch could toss the ground to a relay. We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: 71-72 speedo switch 3438494 [Re: feets] #844312 11/02/10 04:55 PM 11/02/10 04:55 PM
Joined: Jan 2003 Posts: 25,823 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,823 Rio Linda, CA	Yep, that's why I grab every one I find. The INTERNET, the MISinformation superhighway

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