01 Tundra didn't pass it's yearly safety check due to inop horn which now means solving an electrical issue since this is now a critical fix. I've checked the most basic stuff until I did some googling that similar Tundra owners had with the column shaft tilt assy bearings. The horn button completes the ground circuit from the chassis, through the bearings, horn button, then to the horn relay. Wiggling the steering wheel while holding the horn completes the ground as the rusty bearings try to ground to chassis so that confirms the issue.
I opted to replace the whole assembly instead of cleaning the old grease and repacking it with new grease. The failure seems to be a lack of grease in the bearings from the factory and bearings open to the elements. The new assembly also lacked grease. In this case I encased the new bearings with white lithium grease to prevent open exposure to rusting.
I also replaced the column shifter assembly with the updated version since they are prone to breaking.
I opted to replace the whole assembly instead of cleaning the old grease and repacking it with new grease. The failure seems to be a lack of grease in the bearings from the factory and bearings open to the elements. The new assembly also lacked grease. In this case I encased the new bearings with white lithium grease to prevent open exposure to rusting.
I also replaced the column shifter assembly with the updated version since they are prone to breaking.