Hi, 1993 240 Classic wagon; stick-shift (M47 gearbox). Back-up (reversing) lights don't work. All fuses are OK. Both lights failed at same time. No power is reaching the bulbs. Questions: Is it possible to reach and check the back-up light switch on the M47 from under the car? Is the switch in the same position as on earlier versions, M40 etc.? Any other suggestions re the cause of failure? Thank you. Andy I.