Should a fuel pump kill switch be interrupted on the positive of negative?
CK5
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Should a fuel pump kill switch be interrupted on the positive of negative?
- Thread starter wazzabie
- Start date
Kain
3/4 ton status
safer for the pump to use the negative
But that's just to switch the relay, the relay breaks the positive lead.
A pump can't run without the power lead. It can ground out and continue to run with the ground lead open.
Also, most of the ECMs still provide the voltage to the relay for control as well so a key-off takes away the 12V bus AND the negative that closes the relay. Redundancy.
This is for a 2001 Silverado. If I cut the ground I thought the positive then would be looking for a ground as someone tried to hot wire the truck.
