Maserati Manual MK1
Lucas World Service News WSN604 Export
Mistral + 3500 GT Owner's Manual

METHOD
OBSERVE the reading on panel ammeter. Switch OFF the ignition. ALLOW approx. 15 seconds to elapse before
   RESETTING the manual switch. Switch ON the ignition, and again OBSERVE the reading on the panel ammeter.
   If. the pump is functioning correctly it should consume approximately 5 amperes.

ACTION
   a) If NO change is indicated proceed to A.6. via A.5
   b) If the change in readings is high (full scale deflection) proceed to A.7. Via 1.5.

TEST
A.5. To exclude reset-circuit from subsequent tests.

METHOD
 Switch OFF the ignition. DISCONNECT, at the oil pressure switch, the lead from the thermal switch, and, insulate the free end of the wire.
  RESE'I' the manual switch. This need NOT  be maintained in this position for subsequent tests.

TEST
A.6. Blown Fuse

METHOD
Check Fuse.

ACTION
 a) If fuse has blown, proceed to A.7.
 b) If fuse has NOT blown, proceed to A.8.

TEST
 A.7. Current taken by pump motor. (external supply)

METHOD
DISCONNECT the motor at the snap connectors, and reconnect the motor to an external, REMOTE 12v, D.C. supply;
via a 0 - 30 ampere D.C. ammeter, retaining the original polarity and making the final connection at the supply. The black lead should be
connected to the supply positive terminal. The white/purple lead should be connected to the supply negative terminal.

CAUTION:  NO SPARKS SHOULD OCCUR NEAR PETROL ENCLOSURES.

The pump should consume approximately 5 ampere.

ACTION
a) If the pump functions satisfactorily, taking approximately 5 amperes; check wiring, particularly for short circuits. Fit replacement fuse
    after rectifying circuit.
b) If the pump takes a high current (20 amperes), it has stalled. A replacement should be fitted, together with a fuse

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