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Old 02-06-2016, 09:50 AM
86-300sdl 86-300sdl is offline
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Join Date: Nov 2007
Location: Carlsbad, CA
Posts: 520
Quote:
Originally Posted by mikeyfev1 View Post
How would I test the front dome light on my 86 300SDL to determine if it is functional? I tried different combinations of 12V vs ground on the five pins and changing the switch settings, but I never got what I would consider a normal result.
Your drivers manual will have the expected results for each switch setting.
If you don't have the manual let me know and I'll go make a copy of mine (lighting function page).

IIRC - Two manual "on" settings, one auto on/off with fade off feature setting triggered by opening and closing the door, and an "always off" setting.
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1986 300SDL 440,xxx
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