Yeah to @Meir!
You did not solve it…but explaining it is HALF the battle. This is EXACTLY what I have run into as well. Been pulling my hair out!!! Load resistors will NOT work either! Don't want to do a 'hatchet job' on the lights!
You can use the turn signals (with a EP-35 flasher from Autozone). The side markers and rear cruising lights use standard 2825s (or T10s) but replacing the others has not worked. It has been a nightmare!
@Tony_Fury spent some time with me diagnosing the circuits. They work in his car but he has aftermarket head and tail lights.
Welcome to the party @Meir…I have been banging my head with this for months.
Psst! You wouldn't happen to want to buy any LED lights in white and Amber, would you? Got a bunch of them! The LEDs are VERIFIED to work - just NOT in our cars!