Prelude L4-1958cc SOHC (1988)
Charge Lamp/Indicator: Testing and Inspection
Prior to performing test, check alternator belt tension and electrical connector for proper installation.
1.
Place ignition switch in the On position, the charge warning lamp should be illuminated. If charge warning lamp is not illuminated, disconnect
alternator electrical connector and connect a jumper wire between terminal with white/blue wire and ground and note the following:
a. If warning lamp is still not illuminated, check for blown fuse, defective charge indicate lamp bulb or open circuit in wiring (white/blue wire)
from warning lamp to voltage regulator or wiring (black/yellow wire) from warning lamp to fuse panel. Also check wiring between fuel panel
and ignition switch.
b. If lamp is now illuminated, refer to ``Alternator and Regulator Test.''
2.
Start engine and allow to idle, the charge warning lamp should go off. If charge warning lamp remains on, check for the following;
a. Check for blown fuse No. 37 in relay box located in engine compartment.
b. Check for open circuit in wiring (white/green wire) between alternator and engine compartment relay box.
c. If fuse and wiring are satisfactory, refer to ``Alternator and Regulator Test.''
Fig. 4 Integral control unit location. 1988 Prelude
3.
Remove front console, then disconnect electrical connector from intergrated control unit, Fig. 4. With engine operating, check charge indicator
lamp and note the following:
a. If indicator lamp is now not illuminated, a short circuit in the integrated control unit is indicated.
b. On models less A/C, if lamp is still illuminated, a short circuit in wiring (white/blue wire) between warning lamp and control unit is indicated.
c. On models with A/C, proceed to step 4.
Fig. 5 A/C compressor control unit location. 1988 Prelude
4.
On models with A/C, remove glove compartment, then disconnect electrical connector from A/C compressor control unit, Fig. 5. With engine
operating, check charge indicator lamp and note the following:
a. If lamp is now not illuminated, a short circuit in the A/C compressor control unit is indicated.
b. If lamp is still illuminated, a short circuit in wiring (white/blue wire) between control unit and indicator lamp is indicated.