thats not odd, the voltage readings i get are odd lol .... I was going to replace the bulb yesterday, but tried out so many scenarios it confused me more. I believe with the trunk bulb plugged in I get 6 volts to the rear dome light. Now the trunk bulb is unplugged and I get something like 0.17 I can't remember. I was so confused, I gave up but maybe during the week I can write down my findings. However, the back door lights at the bottom are both almost 12 v and so are both of the back door switch voltage readings. Just gotta keep searching with the wiring diagrams I guess to see where the PO messed with the wiring. (I'm still not sure if a bad convenience control module which is under the back seat would cause these symptoms.) I did however see that the sunroof power wire is almost 12 v, but the antenna power wire is something like 0.17 or 0.18 with the convenience relay removed or swapped with the power seat relay.

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1994 E320, 145,000 miles