Posted this in the wrong area..here is my dilemma:


My 69 Coronet recently burned up the engine wiring harness. I installed a new harness and it runs great. Problem is when starting it, it only fires when I release the key from he START position, to the RUN position. I have tried new switch, just put in new ECU and wiring. Everything seems wired correcty and matches the instructions, but same result. What is wrong here! I have been messing with it for months now, and its the same result no matter what I do. Since its a 69, is there a splice I need to make to get juice to it in the START position? I am lost...
Dave

Not knowing what you did/ changed for wiring, I can't say specifically, but here's how it "used" to work.

Chrysler ignition switches have THREE important, separate circuits inside, that is what amounts to three separate switches SO FAR AS THE ENGINE goes.

1. Ignition run. This is normally the blue wire, which feeds the ballast resistor (originally) the regulator, electric choke if you have it, and the alternator field on 70/ later cars, and may feed the idle stop solenoid, don't remember. In any case it is LIVE in "run."

2 "Engine start." This is the wire that feeds the fender/ firewall mount start relay, and fires up that relay when you twist the key to "start."

3 Ignition resistor/ ballast "bypass" circuit. This wire ALSO comes from the switch, and feeds "hot" battery to the coil + when the key is in "start" and is normally brown.

I would guess that you are missing this last connection. You have a wireing diagram?

Post Extras:

dssaa
super street


Reged: Oct 06 2003
Loc: Colorado Re: Electronic ignition issues..pulling my hair out.. [Re: Yancy Derringer]
#6553435 - Sun Mar 27 2011 10:28 PM Edit Reply Quote Quick Reply



I have a color wiring diagram, and everything seems correct according to that. I am wondering about my starter relay now that you mention that portion...I am going to go look at it and the wiring to/from it. Maybe I have an issue there?
Thanks
Dave

Post Extras:

dssaa
super street


Reged: Oct 06 2003
Loc: Colorado Re: Electronic ignition issues..pulling my hair out.. [Re: dssaa]
#6553477 - Sun Mar 27 2011 10:48 PM Edit Reply Quote Quick Reply



Okay, on the ignition switch itself, all the terminals are marked. There are posts marked "ignition 1" and "ignition 2". I am assuming one of these is start position, the other the run position? Is that true, and if so, which is which..I can trace that wire under the dash and to the resistor. I have checked the new harness over and over, and its wired correctly. Starter works fine, so assuming the relay is still good, all wires look good. Ideas?
Dave

I put a test light on the Brown Wire terminal for ignition 2 at the bulkhead connector. When the key is in run position, it has juice. When I turn it to start, nothing. Something is wrong here...
Dave

The eng half of the bulkhead w the brown wire will b hot in run as current feeds back from the downstream end of the ballast which has the brown wire as current is fed to the other end of the ballast from the blue wire in run so that's normal. While someone holds the key to start check for fire at the ign2 (brown wire male terminal) on the ign sw then continuity on the connector that plugs onto the sw then the brass terminal in the rear half of the bulkhead

okay...I will give that a shot tomorrow...thanks for the help..will update tomorrow evening.
Thanks

So, I have juice in the run position at the ignition switch..now what...???

Dave

You have juice at the run (ign1) circuit. (in addition) need juice at the brown wire (ign 2) ign sw terminal out to the bulkhead w key turned to crank. Can pull the yellow wire off of the fender starter relay to disable the starter till you get it sorted out

You are probably running a 4 wire connector with a single ballast resister, with your new electronic ignition system. Run a splice from the brown wire and the blue wire and it will run.

Hello:
This may sound off the wall but ---how is it grounded. My Control unit is grounded with external star washers got to get to bare metal under it bolted to the inner fender well.
If your grounding is poor you will have nothing but problems.

Maynard

So...I have juice at IGN2 when the key is turned..but nothing out of the bulkhead. In IGN1/run, juice at bulkhead. I have the brown wire and blue wire mated to the same terminal at the ballast resister. Yep, single resistor 4 wire setup. What splice would I use, or do I pull bulkhead connector and check connections there.. Car runs fine and starts fine when key is released..but its just wrong and I want it right..

You have fire at the ign2 (brown wire) ign sw terminal in "start" right? and the connector on the back of the ign sw is good (continuity) right? OK, seperate the bulkhead & check for fire at the brown wire brass terminal on the firewall half of the bulkhead in "start" (use a NAPA 725147 male terminal to clean it). W it clean then check/clean the male terminal in the front bulkhead half if needed w a mini steel bristle brush.

Hey Robert..yeah, I pulled the terminals off the bulkhead connector, and there is definitely evidence of some burning..and thats not surprising considering what happened. Gonna go clean it up right now and see what gives.

Robert/Yancy.. Thanks for all your help. I pulled the connectors at the bulkhead and was cleaning all the terminals. Rewired the ballast and ECU back to how they are supposed to be. I picked up end of new harness and looked, and the terminals for the brown wire and one next to it were bent so they would not make correct contact at bulkhead. I straighened them out, replugged it all in, and its working perfect now. Man, do I feel dumb. I owe you both a beer. Actually, over the past year, I probably owe Robert a case! Why are Mopars so frustrating..and so much fun at the same time. Do you guys come down to the big Mopar show here at Bandimere Speedway in May? If you do, first round is on me...
Thanks again
Dave

It is well worth attending. The swap meet is usually not very good, but he racing in great, the people are great, and the beer is cold. Great people. My wife and I go every year..usually drive our 73 Challenger there..I think we will take the 69 Coronet this year. Any events up your way..say mid July..we are heading that way...
Dave

Not sure what's going on yet

this is the correct relay for that diagram was made:

http://tampabay.ebayclassifieds.com/part...111/?ad=6629059

it provides a BALLAST source from there

Dave, I sent you a PM. Give me a call if you still need help.
-Jim-