Usually, if you have a low voltage, it means there is a high resistance somewhere in the circuit.
'Somewhere' is the word here. It's impossible to tell which part is defective until you check all the components of the circuit for high resistance (wires, relay, fuse, etc).
Keep in mind that a component that 'looks' good is not necessarily working right.
DON'T check components by doing a continuity test; it will only tell you if there's current going thru the component but not if there's ENOUGH current going thru it.
You need to find what the normal resistance is for each component, and then do an Ohm test and compare what you have with what it should be.
I'll be honest, troubleshooting an electrical problem can be a pain in the butt.
I would not do this until I've rulled out any other possiblities.
If your voltage reading at the pump is normal when you turn your key to 'start', low voltage is probably not the problem.
Tuesday, September 2nd, 2008 AT 12:50 PM