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EFV-8 Club Forum / General Ford Discussion / Engine test stand wiring questions

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Posted By Discussion Topic: Engine test stand wiring questions -- page: 1 2     Flatbob 07-09-2012 @ 2:04 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 Problem solved! The "mysterious" small post on the starter is for ignition not ground as I thought; so I ran a wire from the small post on starter to cold side of starter button and now starter spins like a top. Thanks everyone for your patience & help. This message was edited by Flatbob on 7-9-12 @ 3:50 PM Flatbob 07-08-2012 @ 8:58 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 40CPE, the starter does have two posts, one for the cable and I assume the very small post is for a ground. I may try as you suggest. Update: my meter says 12.55V at the starter cable post when I push the starter button but still won't crank, am now inclined to believe as "Super" suggests that I have a bad starter motor. This starter is new but about 4 years old but was never installed till a few days ago. Lesson learned but expensive. 40cpe 07-08-2012 @ 7:52 PM reply profile send p.m. Member Posts: 488 Joined: Jan 2010 Didn't he say his starter is a Hi-torque starter with two terminals? Shouldn't he bypass the Ford starter relay and run the battery hot cable directly to the battery post on the starter, then ground or put a hot wire (whichever is correct)to the small terminal? Flatbob 07-08-2012 @ 6:15 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 Will pull the starter and check. Checked starter button with meter and it's okay across its posts and delivers 12.69V through the wire that goes to starter relay; when I push in the starter button the relay clicks and voltage drops to 12.46V, is that a significant enough drop to rule out a bad starter? supereal 07-08-2012 @ 4:14 PM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 Looks like a bad starter. I'd pull it off the engine and apply battery voltage to see if it will run. Lack of voltage drop says it is the problem Flatbob 07-08-2012 @ 3:00 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 Ran a battery cable across the two cable posts on the starter solenoid posts and the starter still failed to crank, not even a spark, yet am getting 12.6V at the battery side of solenoid. Am thinking about removing the cables from the solenoid and making direct contact with each other and see what happens. Any thoughts? This message was edited by Flatbob on 7-8-12 @ 3:01 PM Flatbob 07-07-2012 @ 3:03 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 Super, got the solenoid to click when I shorted the two small terminals on the solenoid. I'll find some gloves and run a battery jumper cable across the cable posts on the solenoid and see what happens. I think your right, I probably fried the starter button as I recall I had a wire get extremely hot when I first had the button wired. Thanks for the help, Bob supereal 07-07-2012 @ 1:51 PM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 Yes. You can jump across the big terminals on the soleniod with a heavy connection, such as the kind of cables used to jump start cars. Or you can remove one of the battery cables at the battery, then connect both battery and starter on the same solenoid terminal. Then place the battery cable back on the battery. Be careful, as a starter draws 500 amps or more, so wear heavy gloves to prevent burns. I suspect that the starter button may have burned its contacts. Before you try to run the starter with a direct connection, touch the terminal on the solenoid that goes to the button to ground. That should pull the solenoid if the battery isn't run down. At least, your should hear the solenoid click. This message was edited by supereal on 7-7-12 @ 1:53 PM Flatbob 07-07-2012 @ 1:35 PM reply profile send p.m. Member Posts: 437 Joined: Oct 2009 Super, have done as you described and starter button no longer arcs internally but starter motor doesn't crank. Is there a way to wire the starter motor direct (battery cable to starter cable?)to see if it's good? supereal 07-07-2012 @ 12:29 PM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 I'll give it another try. Your solenoid with two small terminals should have one connected to the large battery terminal of the solenoid (not the starter motor side), and the other to one side of your two terminal button. The remaining terminal on the button should be connected to a good ground, such as the mounting screws holding the solenoid. Pushing the starter button will then cause the solenoid to work, running the starter motor.

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