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I'm tracking down an intermittant problem that causes the warning lights in the instrument panel to remain unlit with the key on. When this occurs, I find a good "ground" circuit between the alternator warning light and the D+ post on the alternator. I'd like to test for 12V into the panel from the ignition switch, but not sure* which wire supplies it. Does anyone know which wire is the power source?
*My Haynes manual shows a blue/red wire from the ignition switch to the warning lights, but their wiring diagram is for a 940SE, so I don't trust it applies to my plain Jane 940 (has a different fuse box for one).
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