My ford escort has all ignition lights but does not turn over i was advised it was the main fuse box i have changes that for a new one but still have same problem any one have any ideas wa else it cud be cheers

Check voltage at big wire on starter with voltmeter, should be same voltage as battery.If ok check voltage at small wire at starter, while some one turn's key to start should have voltage,replace starter, if no voltage, check ignition switch for voltage while you turn key to start and off probe all wire's at switch, if no voltage bad switch, if you do have voltage, check clutch starter safety switch ( if stander trans )under dash or neutral safety switch ( if auto trans ) at trans. probe for voltage.

Perhaps you could take it your mechanic and see if there are any codes anywhere...if not, then did you check the battery? might be bad...run a load test and start with that...if not, then check all your battery connections...tight and CLEAN...try that..if not, check for power down at the starter..if present, check for power going across the solenoid...if power comes in and does go out, then replace your starter..if comes in and goes out, then with the ignition held in the crank position, tap the starter with a hammer..if it cranks...replace the starter.

Check the starter solenoid mechanism might have a burn'd contact in it