Gold Lifetime Member
Join Date: Jun 2005
Location: Milwaukee, WI USA
Wow, very strange.
Thought #1) Passenger side lights are all at the end of their respective wire harnesses... could there be a possible voltage drop along the harness??
You may want to measure the voltages on the passenger side.
Thought #2) Did you rule out any issue with the bulbs by swapping them from side to side?
1969 Camaro SS, 350(NOM), M21, 12 Bolt Posi, 01B LOS Build
1977 Camaro, 350(LM1), M20, 10 Bolt Posi, Purchased New, (SOLD)