Originally Posted by
matty325
ok so i need to change the wiring to the pump ,im assuming i need to strip the loom back and trace the wires from more or less fusebox/relay to the pump itself and fit a new relay.loom is out the car so will have to lay it out and have a good look at a glance it all looks good as the car is a low miler
No, if this is the issue, you need to rewire the pump from the battery, as it's this that is the problem.
A crude test is to measure the voltage, this should be what is at the battery ideally and it probably will be.
But when under load the extra demand can see this @ less than 12V, not good!
Martin