Question for you guys. I have a non functioning sidemarker lights on my 300D. Both sidemarkers worked at one time, now neither one does. All the fuses are ok. One bulb is shot. Are the paralelled so when one bulb breaks both sidemarkers fail?

Thanks
Kyle

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1976 300D
190,000 Miles
Colorado Beige

1975 300D
Parts Car
78,000 Miles
Rustbucket
Also Colorado Beige

1984 190D 2.2 (Dad's)
156,000 miles
Champagne Metallic Clearcoat

I think you meant to say if they are SERIESed . . .
They are independent. If one fails the other is independent, this is called Parallel connected.
Probably either the bulb or the socket is bad.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!