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Starter Solenoids Keep Going Out |
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carnuck
AMC Addicted Joined: Mar/31/2010 Location: Seattle Status: Offline Points: 3942 |
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When the nose bushing wears so the armature turns off-center on the Ford type starters, they draw so much extra energy that they weld the solenoid contacts.
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RB401
AMC Apprentice Joined: Jul/08/2007 Location: United States Status: Offline Points: 232 |
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Ok, this morning I took the car to Autozone for a free starter draw test. The starter only drew only 190 amps, so that does not appear to be the problem. The battery being near new also checked out good. What did not check out however, was the voltage regulator. On his big orange tester, it showed up as being bad. I had him run the test twice. I have read that bad regulators can cause the solenoid contacts to hang up (though I don't why that would happen.) Anyway, I converted the car to a Declo 12SI with internal regulator years ago. So, I just installed a new 12 SI. (It's easy enough but you do have to drill the clearance hole in the alternator from 3/8 to 7/16. No more 5 pin solenoids seem to be left in town, so I am going to get one Standard Products ST-582 types from a local EBAY seller. I did take the car on 35 mile drive today with a 4 pin solenoid installed and everything seems to be working well.
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'73 Javelin AMX, 401, T5
T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html |
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carnuck
AMC Addicted Joined: Mar/31/2010 Location: Seattle Status: Offline Points: 3942 |
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190 is about 90 too high.
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RB401
AMC Apprentice Joined: Jul/08/2007 Location: United States Status: Offline Points: 232 |
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Ok, fried another solenoid. Voltmeter shows 12 volts across the solenoid battery and starter lugs and shows 12 volts at the terminal on the starter. So, the starter it seems is dead. Also, checked voltage on the ignition wire, because I was wondering if the ignition switch could have been slow to release or simply not releasing, but it appears okay, i.e. has 12 volts in start and drops quickly back to zero when released. So, its off to get a new starter.
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'73 Javelin AMX, 401, T5
T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html |
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6PakBee
Supporter of TheAMCForum Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Offline Points: 5457 |
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With the quality of parts you get it seems it's just a crap shoot as to what will fail next.
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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RB401
AMC Apprentice Joined: Jul/08/2007 Location: United States Status: Offline Points: 232 |
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Help!
Does anyone have any idea what is happening here? It's hard to believe I have gotten three bad solenoids in a row. Something must be wrong, but I can't figure it out.
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'73 Javelin AMX, 401, T5
T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html |
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carnuck
AMC Addicted Joined: Mar/31/2010 Location: Seattle Status: Offline Points: 3942 |
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Is the ground wire off the back of the solenoid?
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FuzzFace2
AMC Addicted Joined: Jul/05/2007 Location: Angier, N.C. Status: Offline Points: 10356 |
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OK are ALL the batt. cables new out of box or are they old and look good? If they "look good" I would replace them and dont forget the ground behind the pass side motor mount.
If you run a wire from batt + to the S on the SOL the motor should turn over if not then there is something still wrong/bad somewhere. Now someone said something about a ground wire on the back of the SOL? I have never seen any with this on it but have seen that the SOL needs to be grounded to the inside fender so if you just painted it you may want to cleam off some of the paint to see if this does anything. The other thing the ground from batt to motor IIRC is to the head. Motor painted? Clean off the paint on the motor and put the ground back on.
Once you get the motor to turn over using the jumper wire from batt to SOL you can see if the normal wire will work.
Dave ----
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TSM = Technical Service Manual
75 Gremlin X v8 for sale 70 Javelin 360/auto drag car 70 Javelin 360/T5 Street car |
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RB401
AMC Apprentice Joined: Jul/08/2007 Location: United States Status: Offline Points: 232 |
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The motor does turn over if you jump from battery positive to the starter side of the solenoid.
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'73 Javelin AMX, 401, T5
T5 Swap Page: http://mysite.verizon.net/amxjavelin/t5swap/t5swap.html |
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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