Got a 1990 300 sl and fuse B keeps blowing. This fuse seems to supply into the engine control module.The legend on the fuse coves says air pump clutch ac clutchand kick down solenoid . I do not sense that any of these devices are the sourse of the problem because the fuse blows after the engine starts and I have diconnected the air pump clutch.Any thoughts would be appreciated tks tom r