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Old 04-29-2003, 05:17 PM
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wiring diagram pre-glow -88 300D

someone having a electrical wiring diagram on a -87 300d? with om.603.xx engine? i would love to have one... i always have same glowtime hot as cold... and my car is converted to a diesel so i love to check the wiring for faulty things...

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Old 04-29-2003, 06:49 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,800
The wiring diagram in the 126 shop manual isn't very useful in that regard. It shows a coolant sensor input into pin 6/white wire. It also shows something like a potentiometer with words to the effect that as temperature increases resistance decreases with a reference ground at pin 4/brown. These wires are in the connector that doesn't contain the wires that go to the glow plugs.

91 300SE
87 300SDL
83 300SD

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