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Jaguar XJ6 Horn troubleshooting

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Old 06-06-2012, 01:25 AM
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Default Jaguar XJ6 Horn troubleshooting

Hi guys,

One other quick question, regarding the horn in my jag.

I replaced the stock steering wheel with a wooden steering wheel that was from an 85 VDP. The horn button is present, but I guess it was dismantled by the PO when he was prepping it to ship.

The wire under the button is a single yellow wire (thin). How is this supposed to actuate the horn?

THe wire is connected to a spade connector on the bottom of the button. Is this yellow wire supposed to fit into the center of the steering column? I noticed there was a long, narrow cylindrical tube, with a brass insert in the center. I thought the function of the brass tube was to be like a long wire, which would then go to the relay.

I probe tested the relay for voltage, and I was getting voltage at the Brown/Purple wire & the Green wire. Interestingly when i probed the green wire, i got the relay to "click" -- however, still no horn sound :-(

Can anyone help me troubleshoot my horns?

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Old 06-06-2012, 10:05 AM
Fraser Mitchell's Avatar
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Was it the wheel swap that caused the horns to stop working ?

It helps to have a wiring diagram in these cases, but I am fairly sure the horn button earths the supply, thus switching the horn relay. Horn is always on, regardless of ignition switch position, at least it is in the UK cars.
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Old 06-06-2012, 10:35 AM
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this might help

Horn Circuit Checklist

Doug Dwyer
Pacific Northwest USA
1988 Series III VDP V12
1985 Series III XJ6
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