1974 CJ5 Wiring Issues - JeepForum.com
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post #1 of 21 Old 01-31-2017, 08:41 PM Thread Starter
pgillespie20
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1974 CJ5 Wiring Issues

I recently bought my 1974 CJ5 304 as a project/hobby to learn how to fix it. I began troubleshooting the wiring due to the engine not turning off when the ignition is turned off. Then I noticed the wiring wasn't correct on the alternator, voltage regulator and solenoid. I've corrected what I could by searching other posts/forums for information. I also have a Chilton manual. Below are my current questions/issues. I am a beginner at auto/electrical repair. I labeled the attached pictures from my tracing efforts.

1. Ignition coil is missing. I plan to buy a Duralast C819 from Autozone tomorrow.
2. Wire from distributor currently goes directly to positive terminal on battery. I assume that should go to the positive side of the ignition coil. Should the coil positive also go to the solenoid or to the battery? Where does the coil negative go?
3. My Chilton says there should be an "Electronic Ignition Pack". Is that missing also?
3. On this page about AMC alternator wiring theamcpages.com/chargesys.asp, does "Ignition" and "Ignition Switch" mean the same thing?
4. On the same page about alternator wiring, does "Starter" mean "Starter Solenoid"?
5. What is the device behind the Chevy steering column with 2 wires connected?
6. After the coil is installed and the above wiring is fixed, i'll go back to troubleshooting the ignition not killing the engine (if the above doesn't fix it).
7. The 2 wires from the solenoid to the steering column are spliced into multiple wires coming out of the Chevy steering column so I'm not sure what exactly those 2 wires are feeding. There are a couple wires that go from the steering column to under the body, but I haven't traced those yet.
8. At what point is it a good idea to buy/install a Painless wiring harness? The wiring on my Jeep seems to be poorly installed.

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post #2 of 21 Old 01-31-2017, 08:45 PM Thread Starter
pgillespie20
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Here's a picture of my distributor in case it's needed.
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post #3 of 21 Old 02-01-2017, 02:37 AM
Matt1981CJ7
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You need the Factory Service Manual for your CJ. Chiltons doesn't cut it. Here's a link to the '74 FSM that you can download for free:

http://oljeep.com/edge_74_tsm.html

Review the wiring diagrams for the V8. You'll get it figured out.

Matt


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post #4 of 21 Old 02-01-2017, 08:49 AM Thread Starter
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Great site! Thanks Matt!
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post #5 of 21 Old 02-01-2017, 08:56 AM
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Quote:
Originally Posted by pgillespie20 View Post
I recently bought my 1974 CJ5 304 as a project/hobby to learn how to fix it. I began troubleshooting the wiring due to the engine not turning off when the ignition is turned off. Then I noticed the wiring wasn't correct on the alternator, voltage regulator and solenoid. I've corrected what I could by searching other posts/forums for information. I also have a Chilton manual. Below are my current questions/issues. I am a beginner at auto/electrical repair. I labeled the attached pictures from my tracing efforts.

1. Ignition coil is missing. I plan to buy a Duralast C819 from Autozone tomorrow.
Don't buy a coil, you have an aftermarket HEI distributor with the coil and ignition module built in
2. Wire from distributor currently goes directly to positive terminal on battery. I assume that should go to the positive side of the ignition coil. Should the coil positive also go to the solenoid or to the battery? Where does the coil negative go?
See #1's answer
3. My Chilton says there should be an "Electronic Ignition Pack". Is that missing also?
Also see #1's answer
3. On this page about AMC alternator wiring theamcpages.com/chargesys.asp, does "Ignition" and "Ignition Switch" mean the same thing?
4. On the same page about alternator wiring, does "Starter" mean "Starter Solenoid"?
5. What is the device behind the Chevy steering column with 2 wires connected?
Was in an automatic column? Possibly the neutral safety switch.
6. After the coil is installed and the above wiring is fixed, i'll go back to troubleshooting the ignition not killing the engine (if the above doesn't fix it).
Troubleshoot the alternator wiring, you are backfeeding voltage somewhere that is keeping the motor running
7. The 2 wires from the solenoid to the steering column are spliced into multiple wires coming out of the Chevy steering column so I'm not sure what exactly those 2 wires are feeding. There are a couple wires that go from the steering column to under the body, but I haven't traced those yet.
8. At what point is it a good idea to buy/install a Painless wiring harness? The wiring on my Jeep seems to be poorly installed.
If you so go with a new harness, you will want a universal as the factory harness will have to be modified to fit your current setup
The factory manual will help with the alt and chassis wiring, but will be little help with the steering column and ignition. Do some reading on HEI installs and also maybe look into converting to a newer internally regulated Delco alternator to replace the external regulated unit you have right now. It will clean up the wiring and be more reliable.

80 CJ-5, 74 CJ-6, 56 CJ-5
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post #6 of 21 Old 02-01-2017, 09:18 AM Thread Starter
pgillespie20
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Thanks Fourtrail! I just researched what HEI is. I didn't know coils could be mounted in the distributor cap. Here's a picture of the inside of my distributor. Is this HEI? If so, that would explain why there's not a separate ignition coil.
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post #7 of 21 Old 02-01-2017, 09:25 AM
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Yes, that's an HEI, or a HEI clone. The coil is the part with the white numbers on it.

Matt


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post #8 of 21 Old 02-01-2017, 09:26 AM
Fourtrail
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Yes that is HEI. As for #5, I looked again and that appears to be the brake light switch. Can we get a picture of the top 1/2 of the steering column, i.e. the key switch and turn signal switch.

80 CJ-5, 74 CJ-6, 56 CJ-5
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post #9 of 21 Old 02-01-2017, 09:35 AM Thread Starter
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I couldn't find anything online about that P141215 number to tell me what it was. Here are some pictures of the top 1/2. I can unplug anything and take more detailed pics if needed.
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post #10 of 21 Old 02-01-2017, 09:46 AM Thread Starter
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Since I have a HEI distributor, where should the wire from the distributor go? Currently, it connects to the battery positive side. If that is correct, then I'm thinking my ignition issue must be on the steering column side.
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post #11 of 21 Old 02-01-2017, 10:06 AM
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Most guys wire the HEI thru a ignition switched relay like the diagram below. (compliments to Jeephammer for diagram)

Note, the relay pin 86 needs switched power. It doesn't necessarily have to connect to the factory coil connector, that's just a convenient place to do it.

Matt
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post #12 of 21 Old 02-01-2017, 10:27 AM Thread Starter
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I'll get this relay today autozone.com/electrical-and-lighting/relay-ignition/duralast-relay-ignition/297298_0_10861?checkfit=true

Currently the - post on my battery goes to my frame. Should that go to the starter motor instead? The solenoid does go to the starter motor shown below.

I bought an ignition coil earlier today, but i haven't installed it since yall led me to my distributor being HEI. I was going to return it, but is it worth keeping to connect pin 86 to it?

Also, does the symbol under pin 85 mean that it should connect to the frame or something else?

Sorry I don't know more about this. Thanks for helping point me in the right direction.
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post #13 of 21 Old 02-01-2017, 10:52 AM
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Quote:
Originally Posted by pgillespie20 View Post
I'll get this relay today autozone.com/electrical-and-lighting/relay-ignition/duralast-relay-ignition/297298_0_10861?checkfit=true

Currently the - post on my battery goes to my frame. Should that go to the starter motor instead? The solenoid does go to the starter motor shown below.
The ground cable to the frame is how the factory did it, which is fine, as long as the frame is grounded to the engine (usually at the motor mount). Hammer advocates moving that cable to the starter mounting bolt for a cleaner ground to the starter.

Quote:
Originally Posted by pgillespie20 View Post
I bought an ignition coil earlier today, but i haven't installed it since yall led me to my distributor being HEI. I was going to return it, but is it worth keeping to connect pin 86 to it?
You mis-understand. You don't need another coil. As I said, the pin 86 wire just needs to connect to switched power. The old coil positive wire is a convenient place to tap into switched power.

Quote:
Originally Posted by pgillespie20 View Post
Also, does the symbol under pin 85 mean that it should connect to the frame or something else?
That symbol denotes a ground.

Matt


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post #14 of 21 Old 02-01-2017, 11:00 AM
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No, Just return the coil.

Yes, that symbol is for ground, You might find that sometime in the future it would be nice to install a ground block to make all your ground connection.


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post #15 of 21 Old 02-01-2017, 11:08 AM
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Make sure the resistor wire is no longer there...

Trying not to confuse the issue...

I just completed an H.E.I conversion. pretty simple... just needed to get a Switched power signal to the coil in the distributor.

Stock wires to the coil had a resistor built in to reduce the voltage to the coil. Make sure thats not still in the mix. I believe you need a constant 12V to the coil with H.E.I.... but check it out... this is based on my system not all systems.

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