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Resistor wire replacement 73 454

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Old Jun 21, 2022 | 05:10 PM
  #21  
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Originally Posted by Peterbuilt
Hi again,
Didn't think you would be back so soon with that reply.
Let's start over, tell us what made you change the starter in the first place,
Last fall, one of the times I went to start the car, the starter motor didn't disengage and got shredded by the flywheel. I pulled the starter and pulled out all the scraps of metal from the bell housing and made sure the flywheel itself wasn't chewed up and put in a cheap NAPA clone and it fired up and ran fine, but I was having hot start issues. I would be fine when I started but after driving for more than 20 min, I would pretty much get stuck wherever I stopped until it cooled down, then it would fire up again just fine. I bought the CVR starter in the hopes that that would help with the hot start issues and since they sold a mini torque starter with the r terminal already there so I could just do an easy swap instead of having to wire in a diode.

Originally Posted by Peterbuilt
Is the new starter wired up correctly?
I'm going to go ahead and say no At first I had the solenoid and relay wires crossed because of a stupid mistake using colored tape to mark the wires and the old connections for reference. Due to having blue tape on my solenoid wire and the the r terminal on the new starter having blue rubber housing on the terminal - I matched blue to blue instead of blue to solenoid terminal. I didn't get the engine to turn over at all when it was wired that way, surprise surprise! I swapped the wires so they were going to the correct terminals and then I was getting the car to turn over in start but then immediately die when I let the key back to run. Lots of googling and looking up old posts got the whole bad ballast resistor thing in my mind.

Originally Posted by Peterbuilt
There should be a BLACK ground wire connected to a bell housing or starter bolt NOT to the positive starter terminal.
I think I wired the to the positive starter terminal, so I will move that to the bell housing

Originally Posted by Peterbuilt
With the resistor wire disconnected from the coil connect a voltmeter and post the volts here with the key in ON, START, and RUN.
Will try this when I get a chance, but it won't be for a while as I don't have time to work on it until next weekend. I am a little worried that I'll mess something else up trying to split the resistor wire out from the positive lead wire as they're crimped together on the terminal but I can always replace with a new terminal I suppose.

Originally Posted by Peterbuilt
If NO volts in any position call your Chiropractor for an appointment and locate the ignition switch and make sure the screws holding it to the column are not loose.
Then turn the KEY switch and see if the rod moves the switch.
With it wired in the wonky way that I have it right now, it does turn over and stay running, so shouldn't I at least be able to rule out a bad ignition switch?

Originally Posted by Peterbuilt

The R wire from the starter, the one you spliced into, where does the other end connect to?
Then remove it for now.
I wired r straight to the coil because I mistakenly thought that was the resistor wire and I knew that the resistor wire terminates at the coil - I left the existing resistor wire intact at the coil because I didn't want to damage the positive wire by splitting it out and then just capped off the old wire at the r terminal. What I'm wondering now is where the r terminal wire should terminate? Does that go to the ignition or to the coil. I know there are 3 wires on the + coil - the positive and resistor wire that are crimped together and then a third. Is the third, the wire from the r terminal?

Thanks for all the additional troubleshooting!
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Old Jun 21, 2022 | 05:14 PM
  #22  
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durinsbane
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Originally Posted by 69427
Yeah, you don't want a resistor in that circuit. It defeats its reason for existence. The R terminal circuit is there mostly for vehicles that are driven in the winter. During cold cranking, the battery voltage drops noticeably from what it is in warm weather. With a lower voltage at the vehicle electrical bus, there's not enough current to sufficiently charge the coil with the ballast resistor in the circuit. The R teminal shunts the ballast resistor, so that the coil gets the sufficient current even though the voltage is less. If your car is a summer toy the R terminal should not be necessary.

Back to the basics: With the points open or the ballast wire disconnected from the coil C+, do you have 12v with the key on? And, what is the (still disconnected) ballast wire voltage during cranking?
When I tested voltage at the coil before this "fix" I was getting 12.6 v at the coil c+ in on. In my series of mistakes I don't think I ever actually disconnected the resistor wire, I left everything that was connected at the coil c+ and just added a new wire with the ballast patched in from the r terminal to the coil c+.
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