Originally Posted by Tantalum Kid
The image of the failed controller shown on the page with bypass cable seams to have a lot of electronics inside. How complicated is this device? Especially if can be bypassed by a connection to the battery. Looks like its more than just a relay.
It's reported job is to reduce power (voltage?) to the fuel pump as full power is not needed once the fuel system is pressurized. The reported reason for doing this is to lessen wear and tear on the fuel filter that is an integral part of the fuel pump. Other models have an external, replaceable fuel filter and do not use the controller. When you bypass the controller with the cable you are running full power all the time.
I'm just parroting things I've read... I really don't have a clue as to how much of that is factual.
OK, I really don't have a clue.