side lights and MOT

[john374999]

My car is in for MOT next week just noticed the front side lights, one is 50% brighter than the other. First would this fail the MOT and 2nd anyone any idea how to fix it Thanks John Scott UK Kent

 

[Bob Minchin]

My car is in for MOT next week just noticed the front side lights, one is 50% brighter than the other. First would this fail the MOT and 2nd anyone any idea how to fix it Thanks John Scott UK Kent

Swap bulbs from side to side. If the dim one moves to the other side check bulb wattage and replace as necessary. When bulbs get old the glass can get discoloured. If the fault stays put, then you have a wiring problem. with the lights on, measure the voltage on each side of the bulb with respect to the battery terminals this will tell you which part of the circuit is dropping the volts. Replace wiring, fuses switches as necessary until you get virtually full battery volts at the bulb

hth

Bob

 

[john374999]

Thanks for the reply, my main worry before I go to the MOT is will it fail for the side lights as they are not used for driving JOHN

 

[Mindwipe (6)]

yes it will fail

Thanks for the reply, my main worry before I go to the MOT is will it fail for the side lights as they are not used for driving JOHN

 

[john374999]

Thanks to all replies it was the bulb, black and burnt after only `14 months. A halfords own brand, will buy from France next time Thanks again