Honda Acura NSX 1991 Service Manual page 1214

Remove the glove box (see section 20).
Disconnect the 4-P connector from the cigarette
lighter relay. (Wire colors of 4-P conneclor:
There should be continuity between the A and B ter-
minals when the battery is conencted to the C and
D terminals.
there should be no continuity when the battery is dis-
conencted.