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engine died today.... |
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bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4419 |
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yes and yes.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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Bucks AMX
AMC Apprentice Joined: Oct/18/2015 Location: Michigan Status: Offline Points: 88 |
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See below, this worked for me on my 1970 AMX with the Motorola alternator/voltage regulator system. The diode is added to the orange wire from the regulator, Ford system (similar) is shown in Holley instructions.
Edited by Bucks AMX - Nov/25/2021 at 8:14am |
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1970 AMX 390 4spd Golden Lime
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bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4419 |
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Thanks for the info, Buck. I think we did that awhile ago,
but I'll check with my buddy about it.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4419 |
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I called Holley today and they said that the diode fix only works with their MSD ignition box system. Did this fix work for you, Buck, w/o the box?
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4419 |
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I discussed this issue with a local auto electric guy who
seems to think that AMCs are like space aliens when com- pared with other makes. When I told him that I'm running an MSD RTR dizzy and a blaster coil, he became less inter- ested and suggested driving around with a test light to gather information in case it happened again. I feel like I'm at a loss as to what to do at this point, aside from a test light.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6762 |
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The electrical guy does not know and intermittent faults are just guesswork until you can replicate the problem.
There does look to be a path as Phat is alluding to if the headlight switch does not have the ground wire attached. Just a shot in the dark! |
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Bucks AMX
AMC Apprentice Joined: Oct/18/2015 Location: Michigan Status: Offline Points: 88 |
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Yes this worked for me and no, I do not have a box just the RTR distributor and Blaster coil. Did this in 2016 and no run on issues since.
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1970 AMX 390 4spd Golden Lime
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5905 |
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bikerfox - Electrical things are hard to remotely trouble shoot and even more difficult to write about. One must be adept at reading the factory wiring schematic found in the TSM. Do you have a TSM for your year car and the wiring schematic that it contains? The Emergency Brake Warning Light was an option and has it's own stand-alone tacked-on simple harness. It ties into a hot lead from the fuse panel, thru the bulb, to a rudimentary simple 1-wire grounding "switch" at the e-brake pedal assembly. the tacked-on optional headlight warning buzzer is also involved in this circuit. All these things are DC and mostly 1-wire going to ground when actuated with current flowing. There is a single brown wire with a female bullet connector coming off of the headlight switch that is in the circuit also.
Something is allowing a backwards current feed through most likely the good ol' Rambler Motorola Alternator Warning Light circuit, current flowing the wrong way, causing the problem you're having. First test I might do is to disconnect all connections of both the optional E-Brake Warning light harness and the headlight Warning Buzzer, or which there are ( 3 ) Different versions that AMC issued during that period. |
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bigbad69
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Ottawa, Ont. Status: Offline Points: 6614 |
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Try measuring the switched power after you shut the engine off. A voltmeter is better, but a LED test light will work too. (an old school test light with a bulb will do the same thing as the brake warning light) I'll bet there's still voltage there. Try it again, but disconnect the plug to your ignition box first. See if there's voltage there. That will confirm or eliminate the electronic ignition box as the culprit. Truth be told, your auto electric guy lacks imagination IMO. |
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69 Javelin SST BBO 390 T10
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bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4419 |
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Thanks for your feedback, Phat and BB.
Yes, I have a '70 TSM with the wiring diagram. I've looked at it a zillion times, but that doesn't mean I "get it." I think I'm like some who are electrically challenged. However, I understand the limitations of online help and appreciate your provided directions. Another forum member who isn't too far away may come over for a day and we'll tackle this issue together. On another note, he suggested I check all grounds and electrical connections for any type of fault. One thing I noticed (and don't know how important it is) is that the engine to crossmember ground wire is missing. In place is a 2 gauge wire from the engine motor mount to the frame. I make the assumption that either is correct and both are better. I pulled and twisted all the butt splices and other non-factory connections to see if I could kill the engine. Unfortunately, the engine lived. I even tested by pulling it apart when the engine ran to see if I could kill it and it died as it should have. Just in case the relay separated slightly, I zip tied it, as a long time ago on a different AMC the voltage regulator connector came apart and that problem could have been averted if it was zip tied.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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