MotoGP God
Posts: 18,275
Join Date: Apr 2002
Location: Oxford
Mood: Its ONLY a Bike Club
is there 12V on the wires when the pump is connected or is it with it disconnected, if its the later I would be interested to know if the voltage is getting pulled down when connected to the pump.
Could be a dirty filter causing the pump to try and pull to much current and causing a voltage drop.