Thanks for the info, you were right, test the tester.
Sometimes you can't see the wood for the trees.
2 new lamps are all is ok, dual filament lamps threw me !
Thanks again !
Can we have a little more info?
“Lamps are all ok, they are on and I've checked them with a meter.”
Lamps = tail lights?
“I've checked them with a meter.”
The brake/turn bulb?
Now a suggestion.
Rule # 1 “always test the tester” (not your meter)
Go buy new bulbs and install 1 in the passenger side only.
Check to see if it works.
Good luck
ab