Honda Prelude 1993 Service Manual page 1216

Engine Low Oil Pressure
Vehicle Speed Sensor (VSS)
Indicator System
Replacement
Switch Test
Disconnect the 3-P connector from the vehicle
speed sensor (VSS).
Remove the mounting bolts, then remove the VSS.
NOTE: The VSS drive link is a very small part, be
careful not to lose it.
3-P CONNECTOR
3.
Install in the reverse order of removal.
ENGINE OIL PBESSURE SWITCH
18 N.m (1.8 kg-m, 13.0 lb-ftl
1/8 in. BSP (Eritish Standard
Pipe Taper) 28 threads/inch.
Use proper liquid sealant.
OIL FILTER
YEL/RED WIRE
POSITIVE TEBMINAL
3.
lf the switch fails to operate, check the engine oil
level. lf the engine oil level is OK, check the engine
oil pressure and, it necessary, inspect the oil pump
(see section 8).
2 3 - 1 3 8
1. Remove the YEL/RED wire from the engine oil
pressure switch.
2.
Check for continuity between the positive terminal
and the engine (groundl,
a There should be continuity with the engine
stopped.
a There should be no continuity when the engine
runs.