Replacing Tail Lights
I have a 1971 Safari 23 foot with (cheap) retro-fit tail lights mounted over the original tail light housing.
To replace these retro lights, I purchased the canister type 1156 and 1157 light fixtures (originally used by Airstream from 1969-1974) which fit into the existing (original) tail light housing.
Before disconnecting the retro-fit lights I checked to see which filament in the 1157 bulb burned when applying the brakes and verified it was the bright filament.
When I removed the retro-fit light and installed the new 1157 canister, the dim filament burned. It's the same scenario when I checked the turn signal, retro burned bright, new canister burned dim.
What's the problem?