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moso »
https://forums.nicoclub.com/moso-u137641.html
Sat Sep 11, 2010 6:29 pm
one blue one is your accessory relay, one blue one is the bulb check relay (whatever that means) one black one is rear defroster the brown one is your ignition relay but its only if you have power windows (if not its blue) and i cant remember what the last black one is for sure but i believe its power locks. you can find this info and more on page 905 of the 89-90 240sx fsm (under the heading of "location of electrical units")