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'12 Corvette electrical question
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DRR S/Pro
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In the power distribution system in the engine compartment there is a fuel pump relay but also a fuel pump fuse. Why both? I have elementary enough understanding that a fuse prevents an amperage overload.


Illegitimi non carborundum
 
Posts: 2331 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post
DRR Sportsman
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The relay is the “switch” so to speak that actually sends power to the pump. The fuse like you said provides protection against an over draw of current due to whatever problem may occur.
 
Posts: 487 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011Reply With QuoteReport This Post
DRR S/Pro
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Wooley thanks. Not that I need an explanation, but I understand, say, you put a relay on your headlights so all the power doesn't run through the dash switch. Since there is no such switch for a fuel pump (on a passenger car) I'm assuming the low current side is for the computer.?


Illegitimi non carborundum
 
Posts: 2331 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post
DRR Sportsman
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The control for the relay is the ecm. In other words the ecm is the switch for the relay.
 
Posts: 487 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011Reply With QuoteReport This Post
DRR S/Pro
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Thanks, appreciate you taking the time!


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Posts: 2331 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post
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