D21 Hardbody 2WD L4-2389cc 2.4L SOHC MFI (KA24E) (1990)
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Blower Motor Relay: Description and Operation
The blower relay (BLUE), located on the R.F. fender apron between the relay box and the firewall, signals the ECU when the ventilation blower is
on. The ECU can then raise the idle to compensate for the added load.