MM1000 Fuel Pump

[Sandun]

the pump 12 v of Morris minor 1000 , so , is it not damage when the dynamo issue 15 v 16 v voltages ? - other hand ,the pump have not a fuse to protect it from hi voltage ? I have to increase voltage regulator Because of that ,the battery not full charge - then I put multimeter " + " to middle screw that under the 2 fuses and put " - " to the earth , then check voltage while increasing engine , it was 15- 16 v

[Fingolfin]

The fuel pump is fused through the same fuse that protects the wiper motor and the indicators (among other things). The fuel pump does run at 12v, but I imagine it easily survives higher or lower voltages -- the important thing is that the voltage is stable over time.

[Sandun]

" The fuel pump is fused through the same fuse that protects the wiper motor " I think no , pump has not a fuse - ignition system and fuel pump ,joint with directly ignition switch not fuses

[MarkyB]

Take the fuses out and see what still works.

[Sandun]

yes ,when the 2 fuse out the pump still work ? I ask you 15v 16 v - is it not a problem ( to damage ) to the pump ?

[bmcecosse]

The pump and the ignition are NOT FUSED.......... Don't worry about the volts - but at 15/16 volts you will boil the battery dry. That's far too high - 14 volts is correct. Turn it down!

[Sandun]

Roy my friend ,thank you - just look how to read me 15 v -16v I put multimeter " + " to middle screw that under the 2 fuses and put " - " to the earth , then check voltage while increasing engine , it was 15- 16 v ----- is it fine ? - may I down voltage ? when the battery charged the voltage , dose not go down automatically ?

[bmcecosse]

It's set too high at the voltage regulator - it needs adjusting. Read all about it in the Workshop Manual..... 14 volts is correct on a full charged/warm battery.

[Fingolfin]

Ah, I see my error. The wire to the pump only intersects a fuse, it does not pass through the fuse. Hereby retracted.