" the fuel pump is grounded on the frame right by the fuel pump." While t-shooting a won't start problem yesterday, one of the things I checked was the fuel pump for operation and ground. Bentley says what you said, but on my '86 the FP is isolated from the frame with a rubber block on the bracket. Two wires lead toward the engine compartment. My problem was a broken wire terminal at the alternator (2nd time for that for me).> Date: Fri, 27 Apr 2012 13:43:40 -0700
> From: scottdaniel@TURBOVANS.COM
> Subject: Re: more information on engine swap/fuel pump woes
> To: vanagon@GERRY.VANAGON.COM
> 
> re
> "so if the ecu is not grounding the fuel pump correctly"
> 
> there's confusion all right,
> the ECU does not ground the fuel pump.
> the fuel pump is grounded on the frame right by the fuel pump.
> 
> the ecu supplies ground to the FP relay to energize that relay.
> Switching can take place in the power or ground side  of any DC circuit ..
> horns for example,  typically a switched on in the ground side of the
> circuit.