Barry, sorry to hear your back is so bad...
I wouldnt laugh at a Neon, Like you said..
But removing an engine to find a fuel pump wiring short!!!! Makes one weep.
Actually I dont work on anything but my own Fords, but this isnt really a
I assume from your post the fuse blows as installed.. not dependent on ign
If a 20 amp fuse is blowing, that USUALLY isnt a corrosion problem, as that
is a product of oxidation, and oxides are electrical insulators... save for
very high voltage... or very low value fuses
It's probably a pinch.
Here's what I would do... verify the pinch or short by probing the fuse
connector to see which side is hot and which side isnt... then after
disconnecting the battery.. check with an ohmmeter from the load side of fuse
to the negative battery cable terminal. (to eliminate possible bad connection
The meter should read less than 1 ohm.. (according to ohm's law) that would
verify a short before the relay
So the thing would be to find the relay.. and check all the wiring in between
the fuse and relay... if it's in the same box.. that's a pretty short trip.
But if it blows as the key is turned, that's different... that would put the
problem AFTER the relay.
I've never tried it, but a tone-tracer might be able to trace the wire to the
point of the short... just about any phone guy or computer network tech would
have access to one.