Honda Acura NSX 1991 Service Manual page 942

Troubleshooting
From page 22-53
Measure voltage between the
ORN/BLU terminal (+) and body
ground t-1.
Is there battery voltage?
fan control unit and recheck.
If symptom/indication goes away.
replace the original control unit.
22-54
NO ,
Repair open in the ORNlBLU wire
between the condenser fan relay
and cooling fan control unit.