Heater Air Blower
Measuring the motor speed and the fuel delivery quantity can only be done by measuring the current.
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Remove 16 Amp main fuse. Open footwell outlets and pull heater flap lever fully back.
Disconnect cables from heater air blower. Connect ammeter and battery as shown.
For a 12 Volt battery the current input is 6.5 to 7 Amps. Deviations in readings are due to defects in the heater air blower.