Question about Cars & Trucks
Posted by Anonymous on
Why would you want a kill switch ? The PCM supply's B+ voltage to energize a relay that turns on the fuel pump. When the key is first turned to on the PCM - engine computer will energize fuel pump relay for two seconds to prime the system . It won't turn it on again untill you crank the engine . ( Turn key to start ) An that is only if it sees a RPM signal from the crank sensor .
GM Fuel Pump Relay Testing
Posted on Jul 18, 2017
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Posted on Jan 02, 2017
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