Is that the only time you have voltage there? What about key off (out of the ignition) and all the doors closed?
This may go back to a defective door switch and the PO just pulled the bulb as a fix.
Scott
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Camano' 1986 F250 Supercab XLT Lariat 460/C6
'Chanute' 1980 F350 C&C 400/NP 435 - Gin Pole
But there ain't nothin' wrong with the radio
Locked
