Coil Wire Resister
Thread Starter
2nd Gear
Joined: Oct 2011
Posts: 2
Likes: 0
Coil Wire Resister
I have a Mallory electronic ignition installed in My 1971 Corvette.
I need to remove the resister in the Coil wire to get 12 volts to the coil.
Right now it's runnning aprox 7 volts to the coil.
I need to know where to find the the resister in the coil wire?
I need to remove the resister in the Coil wire to get 12 volts to the coil.
Right now it's runnning aprox 7 volts to the coil.
I need to know where to find the the resister in the coil wire?
Thread Starter
2nd Gear
Joined: Oct 2011
Posts: 2
Likes: 0
Drifting
Joined: Jul 2004
Posts: 1,695
Likes: 65
From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
2017 C3 of Year Finalist
Cruise-In VIII Veteran
St. Jude Donor '07
The other wire goes to the starter solenoid. It is there to supply 12 volts durong the cranking process. Once you let go of the key, that wire is no longer hot, and the wire that comes from the other side supplies the lower voltage.
Just a note, I recently replaced my engine wiring harness, and when I checked while starting the car for the first time, there was 12 volts to the coil all the time. THERE WAS NOT A VOLTAGE DROP, NO RESISTANCE IN THE WIRE. Because I do not run points, this was not a problem, but something you may want to check when replacing the wiring harness.
Just a note, I recently replaced my engine wiring harness, and when I checked while starting the car for the first time, there was 12 volts to the coil all the time. THERE WAS NOT A VOLTAGE DROP, NO RESISTANCE IN THE WIRE. Because I do not run points, this was not a problem, but something you may want to check when replacing the wiring harness.
Drifting
Joined: Jul 2008
Posts: 1,873
Likes: 27
From: Sonora CA
I didn't even remove it. I just left it there on the coil and added a new (additional) 12 volt source from the fuse box. Rev's jumped 200 RPM's instantly with the added wire. If there ever was a need (or desire) to change it back to a points system, the original wire is still there.
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Racer
Joined: Oct 2009
Posts: 280
Likes: 1
From: cleveland Ohio
i read on this subject for three hours yesterday,most say to wire directaly from fuse box.theres a spot that says ign. just wire some 12 ga. from ign. to the batt. side of dist. cap.thats it. but whoever wired mine used a wire right out of harness,kinda under the wiper motor along with the white resister wire,both going to the batt. connection on side of dist. cap.it seems to work ok. but i do have a hot start problem,and have been thinking this wiring may be the issue.wish i knew.i might do the direct wire soon. good luck,tom.
Racer
Joined: May 2004
Posts: 445
Likes: 1
I would suggest to carry a set of points, condenser and coil with you. My electronics conversion took a dump on me 175 miles from home on an interstate. I was not carrying the above mentioned parts with me, but luckily my travel buddies were. We pushed the car into a nearby rest stop and converted back to points. I will not be returning to after market electronic conversion.
Racer
Joined: Oct 2009
Posts: 280
Likes: 1
From: cleveland Ohio
so does runing the white resister wire along with a 12 volt wire cause any problems,assuming you are using an existing 12 volt factory wire set up,like hot starts,damage to coil,etc... thanks alot.
Racer
Joined: Jun 2009
Posts: 409
Likes: 3
From: St. James, NC
What I did on my 71 was unplug the wire harness and cut the resistor wire as close to the plug end of the harness as practical. Then I sliced a 12 gauge copper wire to the plug end of the resistor wire and ran it to the positive terminal for the coil. The resistor wire was removed from the coil, taped up, and moved aside; the connection at the starter was not touched. This setup gives me nearly 12 volts (11.90) at the coil and does not seem to trouble the Pertonix module or coil I installed. If you go this route, be careful to identify the correct wire. The wire diagram identifies the wire as 20 W/R/B but the wire was covered by a white cloth like insulator (the color may have faded with age) on my car. The wire itself is silver and rather stiff.
hope this helps
Pat
hope this helps
Pat
Racer
Joined: Jun 2009
Posts: 409
Likes: 3
From: St. James, NC
Sorry so slow answering...this was my opportunity to log on.
Pat
Racer
Joined: Jun 2009
Posts: 409
Likes: 3
From: St. James, NC
The original resistance wire was 20ga, but the manufacturer of the coil I was installing recommended a 12 ga wire to the position terminal so that is what I used. Also, make sure you remove the wire running from the starter to the positive terminal on the coil if you haven't done so already. You won't need it with a 12v feed to the coil. Tape over the contact (on the wire) and set it aside.
Sorry so slow answering...this was my opportunity to log on.
Pat
Sorry so slow answering...this was my opportunity to log on.
Pat
hopefully I haven't been too confusing
Take care
pat
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,353
From: Santa Ana CA
I would suggest to carry a set of points, condenser and coil with you. My electronics conversion took a dump on me 175 miles from home on an interstate. I was not carrying the above mentioned parts with me, but luckily my travel buddies were. We pushed the car into a nearby rest stop and converted back to points. I will not be returning to after market electronic conversion.
Going back to stock is simply a matter of unplugging the Mallory box and putting the Mallory-supplied jumper into the harness, and in my case, unplugging a connection that by-passes the ballast resistor to put the resistor back in the current path.
Racer
Joined: Sep 2008
Posts: 454
Likes: 7
From: SB County CA
I realize this post has died out a bit, but I'm running a standard copper 12ga wire, at the moment from coil + to the fuse block. I separated the fuse block in a attempt to remove the pin (of the original white resistance wire) so I could solder the new wire to pin and re-install.
I'm familiar with common pin/block set-up, but can't seem to get this sucker out...have other been successful? Should I just attach to the IGN pin on the other block (accessed from interior? Just wanting a quality set-up when done...I will have to tap into the fuse block for a few other items as well.
Apologies for the 'dumb' questions...thanks in advance.
r,
Rob
I'm familiar with common pin/block set-up, but can't seem to get this sucker out...have other been successful? Should I just attach to the IGN pin on the other block (accessed from interior? Just wanting a quality set-up when done...I will have to tap into the fuse block for a few other items as well.
Apologies for the 'dumb' questions...thanks in advance.
r,
Rob