Looking for a wiring diagram for my Club Wagon I just acquired. It's an 1988 E350 SuperVan Club Wagon with a 351 EFI and dual tanks (beast). Instead of towing it, I'm attempting to fix it and drive it about 100 miles home, but I don't have a decent manual or set of diagrams for it yet (still days away). I really need the diagram for the dual fuel pump system and switching.

 

There might be more immediate and year-specific info available through the Electrical Systems/Wiring sub forums here on FTE: Electrical Sub Forum

Be sure to mention your year, model, fuel type and engine size as you've already done here.

HTH

 

88 E Fuel system:
Attachment 280309

Wiring:
Attachment 283205

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That's incredibly helpful. Does it show the location for the connectors C134, C100 and C135? I wanted to probe them next as I have power to and on both sides of the selector switch but nothing at the tanks.

 

The book reference dose not look right to me for locations.
I no longer have the 1988 E-150 van that I had.

It says C1 guessing it is C100 "Near LH seatbelt retractor solenoid".
No listing for C100.

C134 "LH side of dash, near ignition module".
C135 "On rear crossmember".

Sorry that I can not help more on the locations.

 

Well I dug into it and tracked power all the way to the pump connector at the center tank. Turns out the front tank has two black wires, a brown power feed and a yellow and light blue for the level sender, which differs from that diagram... possibly because it's an E350.

 

As far as the wire colors go here is what I have to go by.
None of them match what you posted.
So take your pick.

The 1988 E-series EVTM:


The 1988 Ford Shop Manual from Ford:


And the 1988 E-series large fold-out from Ford.
.