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I've seen a number of threads with bad replies or no replies pertaining to the function of the horn button ground (through the steering column) on non-airbag 900 cars.
I have done some research into this problem on my own vehicle (non-airbag 900).
It appears that my telescoping column doesn't ground all the way to the rack. The first telescoping segment doesn't make connection to the second, and there's no continuity through either U-joint, nor is there continuity between any portion of the column and the chassis ground (measured by DVOM). Given this is the case, I think we can assume that the column isn't supposed to ground. The likelihood of my column having failed at both U-joints as well as the telescoping segment would seem slim.
So where is it supposed to ground? Bentley manual provides no insights. Just shows two contact rings in the electrical diagram. Logic would suggest that, if continuity is not maintained through the column, the contact must happen up near the horn ring. Perhaps in the bearing? But it can't happen in the bearing because the bearing itself is mounted in plastic on the outside and the column is mounted in a plastic carrier inside the bearing.
I'm going to call my solution the "Redneck Clock Spring" (RCS). I drilled and tapped a very small (3mm) hole in the shaft and attached a wire via a ring terminal and screw. Attached the other end to a good ground, giving it enough slack to turn lock to lock and situating it somewhere it wouldn't bind. I used a 22ga wire and didn't solder it to the terminals, so if it does get hung up it will break instead of binding my steering.
Anybody have any idea about where it's *supposed* to ground?
posted by 66.109.49...
, Wed, 10 Jun 2015 12:38:03
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