can I put a toggle switch in to disengage the fuel pump when the ignition is off?
When the ignition is off, I can still hear the fuel pump humming. The only way I can turn it off is to take the ground off the battery. Can I toggle it somewhere instead?
Sounds like the fuel pump relay contacts are welded together. Try a new fuel pump relay.
Have you replace the fuel pump relay? That is the most common problem with a fuel pump that won't shut off. But to answer your question, yes you can put in a toggle but it has to be able to stand at least a 30 amp draw, you can cut it in just downstream from the fuel pump relay and run the wires throught the front bulkhead and find a suitable location on the dash lip, if you go illuminated then you will have to run another ground to the switch.
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