1977 f150 351m/400
I've got a new starter.Silinoid.Battery.I turn the key
and I get nothing,not even a noise,but the dash
lights come on.When I jump the silinoid wires it
doesn't turn over but I can hear electricity
flowing.Whats the possible problem?
Check the starter relay. Then do a voltage drop test to the starter to make sure it is getting full power. Make SURE the solenoid is wired correctly. (PS: you can hear electricity flowing? That's like a straight-up super power of something...)
Check the battery cables, the starter connection and the ground. These all have to be absolutely clean, free of corrosion and tight.
When I said I can hear electricity,I meant I can hear like a short or something etc,but I've never been able to find it.
I was teasing lol, but if you hear something like a short or buzzing, that may be a bad relay. Look up where your starter relay is, and swap it out with one of the other relays (make sure it is the same amperage). If a different relay works then you know you had a bad relay.
Starter Solenoid/voltage regulator located of the battery side inner fender well in engine compartment. they are cheap $15 or less.
here is photo:::
I know you said you replaced it but I have never heard of relays for this model and sound like this is the issue unless the battery terminals need replaced instead.
Possibly the solenoid is not correctly hooked up.
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