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F250 460 dual tank wiring

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Posted by Slowpoke on May 25, 2007 at 00:07:32 from (

This '86 truck was running OK when I decided to check the timing for no particular reason. I found a slipped harmonic balancer and replaced it. Setting the distributor and TDC, the engine starts instantly with starter fluid then dies. There is now no fuel supply.

The two fusible links (16ga & 18ga) connected to the insulated stud on the left side fire wall were fried, the 75 ohm resistance wire between pin 3 of the fuel pump relay and pin 3 of the tank selector relay was also fried. For some unknown reason, the previous owner did not use the 2 good relays mounted in the firewall relay box, but just hung two other relays on the end of the connectors. One now has an open coil.

Any idea why the 3 wires burned and what can I do about replacing the 75 ohm resistance wire? None of the auto supply stores can find it.

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