2007 column in a 1965 SS - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 4 (permalink) Old May 17th, 18, 11:56 PM Thread Starter
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Mike
 
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2007 column in a 1965 SS

I am trying to install a 2007 Impala SS column with all the bells and whistles into my '65 SS and having some problems. The bottom line is that I do not know what is causing the problem. I have no doubt the Ron Francs kit and provided wiring will be able to handle the load, but I am concerned that the late model ignition switch and associated 22 ga. wires cannot. My understanding is that all the late model vehicles are computer controlled and work with 5 vdc with maybe an amp or two as a logic signal as a control. I could be completely wrong, but is my understanding that the pre-computer vehicles run 12 vdc through the ignition switch the entire time the switch is on or in ACC mode. To avoid damaging the ignition switch and any of the components on the same circuit or power lead, I installed two relays in series to control the ACC and Starter voltage. Recently the relay that controlled the starter had overheated and stuck in the NC (not allowing the starter solenoid to receive the voltage). In my in minimal experience with automotive wiring, I would saw that all accessories have their own circuits that are energized when the key is in the ACC position so the A/C or P/W circuits should not affect the ignition circuit.

I could totally use some ideas or suggestions on how to fix my problem.

Thanks!
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File Type: pdf Ignition Switch.pdf (262.0 KB, 8 views)
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post #2 of 4 (permalink) Old May 19th, 18, 9:54 PM
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Joe
 
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Re: 2007 column in a 1965 SS

You are embarking in a complex task if you have little automotive electrical experience....

You are correct on the basics.

The original vehicles have ignition switches that carried the full load of B+ power to various circuits. Depending on the position of the switch dictated what contact and ultimately what circuit received power when appropriate.

The modern switch only provides small currents to perform request functions to and from the car modules. The modern switch is NOT designed to work like the old switches and can't possibly carry anywhere near the current needed by the old car.

You will have to determine what is the "common" wire in the modern switch. This will have to connect to constant hot in the old car. A fuse in line would be preferable. Then determine what wire in the modern switch becomes "hot" with each corresponding position. I.E. when cranking, what wire gets connected to the common to output 12 volts.... This wire will then have to go to one side of a relay coil, and the common and N.O. contacts of that relay will then take the place of the original switch function wires. I.E. The relay #30 terminal will connect into the original large red wire that went into the factory switch. The #87 terminal of the same relay will then connect to the purple wire that originally went into the factory switch. This would carry out the "crank" function.

This arrangement will have to be repeated for each function that original switch provided, I.E. "on", "crank", "accessory" etc.

This will definitely take some time and planning on your part.

-If you don't stand for something, you'll fall for anything.
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post #3 of 4 (permalink) Old May 20th, 18, 10:32 AM Thread Starter
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Mike
 
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Re: 2007 column in a 1965 SS

thanks for the response CopperTop. I think this is doable and the biggest concern is the amperage for the relays. I think I will go with 70-80A relays just to be on the safe side. I would attach a drawing of what I am thinking but I cannot seem to find how to add an attachment to this post.
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post #4 of 4 (permalink) Old May 20th, 18, 10:36 AM Thread Starter
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Mike
 
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Re: 2007 column in a 1965 SS

I think I just found out how to upload an attachment.
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File Type: pdf Relays v2.pdf (96.0 KB, 5 views)
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