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i have a 1990 full size bronco ,the turn signals are working, the emergency flashers are working the right hand brake light is working but i cannot get the left brake light to work.bulbs are all new .help please pcon
pcon, welcome to the site. There are a few members here with full size Broncos, but this site is really focused on 1966-1977 Broncos, so you may not get a lot of replies.
You might want to try these two web sites for full size Broncos:
i have a 1990 full size bronco ,the turn signals are working, the emergency flashers are working the right hand brake light is working but i cannot get the left brake light to work.bulbs are all new .help please pcon
Like Jon said, one of the other sites may be of more help.
Having said that... I'd check two things:
Sometimes it's possible to install a bulb backwards, so maybe try rotating it around? (Especially true with some LED bulbs.)
Did you check for power with your voltmeter at the socket? Also make sure socket and its terminals are clean - for example, dielectric grease on contacts will cause problems.