reo4ua

-1992
-Ford
-Mustang
-302 HO
-100k

Good power inside cabin and headlights are bright. Turn ignition to start all cabin power goes dead as expected but starter does not engage.

Can start by shorting +/- posts on solenoid.

Replaced solenoid about 3 months ago.

Where should I start to diagnose this?

enix187

Start checking fusible links, also do some research on how to check the ignition switch or you could remove it and check it that way.

mattdel

Find the single, lone wire that's incoming to your solenoid. This is the S-wire. This is the wire that power travels through, from the key, to tell the solenoid to switch. With the key in the START position, use a volt meter to see if you have 12v at that wire. If you don't, you need a new ignition switch (or wiring repair).

reo4ua

Im getting power from the ignition to the solenoid and continuity checks on on fuseable links.

Only thing left is the solenoid itself I'm guessing?????

mattdel

Yup pretty much.

Bubba 95SN

Disconnect wire at solenoid going to starter. Turn to start check voltage coming out of solenoid. Got good voltage, then it is starter.

reo4ua

Thanks to all for the help. It was the solenoid. I posted asking for help on another forum and received 1 reply. It was a schematic of a basic ignition circuit which I had no idea how to read.

Good to know not everyone out there is a smarta**.