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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 1987V20 on May 07, 2006, 11:35:00 pm

Title: wiring
Post by: 1987V20 on May 07, 2006, 11:35:00 pm

On a 1987 pickup with 2 tanks how does the switching valve work?  Does the power for the pumps run through the valve or does it run directly from the relay back to the pumps?  I have a dead truck and I have already replaced the fuel pump in one tank(it really was bad) and now I still get nothing.  I know it will run because I fed it some starter fluid and it fired right up.  Any help would be appreciated

Title: Re: wiring
Post by: roundedline on May 08, 2006, 04:42:00 pm

The power to the pumps should run through the valve.  Are the pumps coming on?

Chris Lucas
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