Does the horn button work? Perhaps the horn wire is shorting out?
Is there any evidence of smoking under the hood? Perhaps some smoke (oil leak into the exhaust manifold?) is finding its way up the column. Maybe cornering encourages/allows a bit of oil to slop/splash onto the manifold?
Is there any evidence of smoking under the hood? Perhaps some smoke (oil leak into the exhaust manifold?) is finding its way up the column. Maybe cornering encourages/allows a bit of oil to slop/splash onto the manifold?