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HELP: Horn inoperative - a mystery.
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Posted by Pete [Email] (#2000) [Profile/Gallery] (more from Pete) on Tue, 23 Jul 2002 22:37:42 Share Post by Email
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Recently my horn stopped working on my '88 900T. Thinking it might be the horn switch pad or slip ring contact, I removed the steering wheel cover and the lower stalk cover underneath. I determined that power is coming through the slip ring/contact to the horn switch pad (able to honk when shorting power wire to known ground under dash). There is also continuity through the horn switches on the pad. However, I discovered that the steering wheel/column are not grounded for the horn pad ground wire that plugs into the steering wheel (can't activate horns when jumping power wire to ground wire or wheel, and no continuity between steering wheel/column and known ground). Since the wheel/column assembly is mounted through bearings & u-joints (bad grounds if any) I'm thinking there should be some other means of grounding the wheel/column. I pulled the steering wheel off and did not see any brush or slip ring that would ground the column/wheel assembly, only the slip ring assembly for the power lead.

Does anyone know how the wheel/column assembly is normally grounded? Is it somehow done through the metal bracket for the stalk switches? I don't know what else to look for, and the Bently manual wiring diagram only shows a ground symbol at the steering wheel, and no specific details in the text.

Thanks.


posted by 162.115.99...

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