Question about 1990 Oldsmobile Regency
You need to test your charging system circuits at the alternator. (see diagram and instructions)
BLK is the cable to the battery POSITIVE terminal - this is hot at all times.
PINK/BLACK comes from Fuse #5 (15 Amp) in the relay center under the right side of the instrument panel. This wire is hot (battery voltage) with the ignition switch in the RUN, BULB TEST, or START positions.
BROWN comes from your instrument panel and is protected by Fuse #16 (20 Amp) in the instrument panel left side fuse block. This wire will have slightly less than battery voltage with the ignition switch in the RUN, BULB TEST, or START positions.
If any of this is not as described, let me know what you have found and we can continue if needed.
Posted on Oct 28, 2011
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