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Starting Circuit Problem

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Old 01-11-2012, 10:41 AM
  #1  
reo4ua
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Default Starting Circuit Problem

-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?
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Old 01-11-2012, 11:00 AM
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enix187
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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.
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Old 01-11-2012, 01:37 PM
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mattdel
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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).
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Old 01-12-2012, 04:07 PM
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reo4ua
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Originally Posted by mattdel View Post
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).

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?????
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Old 01-12-2012, 04:53 PM
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mattdel
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Yup pretty much.
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Old 01-12-2012, 04:59 PM
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Bubba 95SN
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Disconnect wire at solenoid going to starter. Turn to start check voltage coming out of solenoid. Got good voltage, then it is starter.
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Old 01-12-2012, 05:35 PM
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reo4ua
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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**.
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