Steering Wheel Switches

[MJones]

Ford uses resistors for their cruise functions, with two wires handling all 
functions.  I assume the radio controls operate the same way.

  Because my company F-250 Powerstroke did not have cruise control,  (and 
no aftermarket kit was available w/o replacing the steering column) I built 
a resistor bank with switches placed in a trim panel under the light 
switch.  Because all powertrain functions on the P.S. are handled by the 
ECM I had cruise working in about two hours with about $30 bucks worth of 
parts including the wiring manual.  Worked perfectly except for 
occasionally the horn would give a very short beep when turning cruise on 
(the horn is also operated via resistors and ecm.)

Mike Jones

----------
From: 	Joe Boucher
Sent: 	Monday, November 16, 1998 11:01 AM
To: 	diy_efi at esl.eng.ohio-state.edu
Subject: 	Steering Wheel Switches

I went to Las Vegas with the wife the last week of October.  Went to the 
Sahara
hotel where they have an interesting driving simultation using 24, 3/4 size 
Indy
cars mounted on hydraulic rams, each in it's on booth in front of a big 
wide
screen.  You guessed it, you race against the other drivers.  For $8 it was 
better
than the simulators in the arcades.  They give you a read out after you 
race with
a traction circle and other info showing how you did.  After looking at the 
info,
I was less frustrated and wanted to go back, but the wife had another 
agenda.

The transmission was semi-auto with the up and down buttons on the steering
wheel.  That made me think of the higher end cars in the late '80's.  There 
seemed
to be a contest to see who could mount the most buttons on the steering 
wheel.  I
think the Bonneville SEi had more than an F-16 cockpit.  I know each button 
didn't
have a seperate ring in the steering column, so how did the switch signal 
travel
from the steering wheel to where ever it went?  All my electronically 
limited mind
can think of is either different resistances or capacitances or varying 
frequency
signals.

Am I close?

Joe Boucher
'70 RS/SS Camaro  '81 TBI Suburban



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