Hi,changed the bulb on my front passenger indicator(chrome effect)but when it flashes it's not as bright as the other side. I have recently removed the washer bottle to fix headlamp washer pump, could I have disturbed an earth but also I have noticed the bulb holder is a little corroded thanks steve.

 

try the new bulb in the other side to check that, if you see any corrosion then yeah clean it up.

 

I'd replace as pairs if using silver coated bulbs.

 

Hmmm,the n/s bulb blew so i bought a pair of silvatec chrome bulbs frolm Hellfrauds.When ive put the bulb in i noticed some corrosion on bulb holder,anyway i put the new bulb in and it doesnt flash as bright.
I will swap bulbs over and if it makes a difference i guess the proble lies with the bulb holder,cheers steve

 

If it is, clean up with wet-or-dry used dry.
Remember contacts on the base.