bulb not working after replaceing???
 

so i got a new headlight an the 2 parking lights wouldnt light up so i bought 10 led ones. the yellow parking light came on but the secondary light in the main beam bit didint.

so i thought lets try on the other side and the same, no secondary light in the main beam working. tried to put the halogen one that was working back in and...... not working...... on either side of the car.

any ideas as to what might be the problem???

Check fuse[s] then check that power is getting to the connectors in the plug on the end of the loom.That way you'll have narrowed it down to a fault with power getting to the lights or a fault with the light units or bulbs.

Hi
If using LED's , are they the correct way around? They are polarity conscious. Try plugging the bulbs the other way around?? Just to check

so it turned out that was it, for one of them but for one it seems the bulb was dead but thanks for reminding me led are unidirectional, i should know better but just totally never gave it a thought.