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Starter Solenoids Keep Going Out

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RB401 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RB401 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/06/2012 at 10:15pm
Ok, so after work, I went out and tried starting the car and what does it do--starts right up!  Tried it a few times, started each time.  So, the problem now seems like either a poor ground or an intermittant open circuit possibly in the s-wire from the ignition switch or maybe the ignition switch itself.  Next weekend, I will get out with the voltmeter and start resistance checking all of the starting system wires, clean the grounds, etc.  Replacing the s-wire from the ignition switch to the s-terminal on the solenoid is probably a hassle, so hopefully that wire will checkout okay.
'73 Javelin AMX, 401, T5

T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Feb/07/2012 at 8:41am
Ignition switches of that age can develop intermittent issues..... can be tricky to nail down.
DO NOT GIVE UP.

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RB401 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RB401 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/15/2012 at 10:40pm
Just wanted to say I finally fixed the solenoid problem last weekend.  I don't really know what the problem was, but the starting circuit is simple, so I replaced the starter, postive and negative battery cables, starter cable and the engine to chassis ground wire. The chassis ground wire was a 10 guage wire and appeared to have been original.  I replaced it with a short 4 guage starter cable. Cleaned all the connections with sand paper.  Checked for continuity through the s-wire and the neutral saftey switch (on the T5).  My guess, it was just a poor ground.  Anyway, no more solenoid hang-up and consequent starter run-on and in general all seems good.
 
Thanks for everyone's suggestions.
'73 Javelin AMX, 401, T5

T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jonb79 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/16/2012 at 10:35am
From my experiece, I have seen constant duty solenoids (heavy duty solenoid used mainly in equipment) weld themselves close due to a stuck relay and or a switch that was bad. I don't know the the diagram of the starter circuit but it wouldn't be a bad idea to check the power at the switch with a voltmeter to see if power is being supplied to the starter relay even with the ign switch off.
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