Car doesnt start in hot weather, key doesnt crank over

[Flash]

I have four ignition switches, late car with the later style snap on switch



i find it hard to believe that four switches, while all used and that were from running cars have the SAME exact problem....
With that said, connections from positive and negative on the batter are good, triple checked, use wheel bearing grease on the terminals, battery is nice and strong. It will start up when cold fine but after the sun has come out it dont click, doesnt turn over, no cranking whatsoever. What the hell is going on? I am seriously frustrated.

When you jump the diagnostic connector it turns over and fires nice and strong as a bad ignition switch would indicate. Though i refuse to believe four switches are bad and have the same issue.

Please help :(

[Boostesi]

I have almost the same issue except I bypassed my ignition switch completley to check and my motor will crank a half revolution then stop. Sometimes 4 or five times in a row then it will crank like normal again and start

[Boostesi]

With the push button or the key

[jlevie]

Since the starter will operate from the diag connector, there is some problem in the branch of that circuit that goes to the ignition switch. A bit of work with a test light will tell where the problem is.