"DoN. Nichols" wrote in message
...

Contacts in the relay are the most likely. That was what was
wrong with ours, when I was prepared to swap out the fuel pump to
get a
working fuel gauge. :-)

DoN.

On my 1991 the relay that powers the computer stuck closed and drained
the battery in a few days. It was hard to trace because lower-cost
clamp-on DC ammeters drift too quickly to read low currents accurately
and I didn't want to risk a good meter's current range directly in
series with the battery. Afterwards I bought a bunch of cheap HF
meters for such jobs.

The Ford electrical connectors can be disassembled by pulling out the
red insert with fine needlenose pliers and moving back the hooks that
retain the individual pins with a small screwdriver. They pull out
through the soft rubber at the rear of the connector. Autozone sells
replacement pins.

When I was looking to buy or borrow a breakout box a mechanic told me
they aren't necessary and to push a straightened paper clip in along
the wire to measure the voltage on a connector pin.

A printout of the Alldata schematic was nearly as useful as the
factory shop manual, and easier to follow.

jsw