Prelude L4-1958cc SOHC (1988)
Coolant Temperature Gauge: Testing and Inspection
1. Make sure the ignition switch is OFF, then disconnect the RED wire from the coolant temperature gauge sender and ground it with a jumper wire.
2. Turn the ignition switch ON.
Check that the pointer of the coolant temperature gauge starts moving toward "H" mark.
CAUTION: Turn the ignition switch OFF before the pointer reaches "H" mark on the gauge dial. Failure to turn the ignition OFF quickly enough
may cause damage to the gauge.
^ If the pointer of the gauge does not swing at all, check for:
-
Blown No. 13 (10 A) fuse in the dash fuse box.
-
An open in the YEL or RED wire.
Replace the coolant temperature gauge if the fuse and wiring are normal.
^ Inspect the gauge sender if the gauge is OK.
