Help - MSD6A on C3
Thread Starter
Drifting
Joined: Sep 2001
Posts: 1,427
Likes: 1
From: Boxford Mass
Help - MSD6A on C3
Tried the c3 forum, but no luck...
My coil has two wires attached the positive terminal. One of them is insulated. One is from the ignition switch and the other goes to the solenoid.
What is the purpose of the wire to the solenoid? Can I remove it?
This is going in a 71. Any help appreciated...
My coil has two wires attached the positive terminal. One of them is insulated. One is from the ignition switch and the other goes to the solenoid.
What is the purpose of the wire to the solenoid? Can I remove it?
This is going in a 71. Any help appreciated...
Burning Brakes
Joined: Nov 2001
Posts: 1,189
Likes: 2
From: Austin TX
Re: Help - MSD6A on C3 (74jack)
I can't tell you for sure, but by means of deduction I'd say that the wire from the ignition switch must only be hot with the key on (run), and the wire coming form the solenoid must be to provide voltage during cranking (because the first wire must not during cranking, only in run).
If you're installing a MSD-6A then you'll want to remove them both. You can test my theory with a test light, and if that's the case then you can probably splice them together and run them to the small red wire on the MSD box, unless you've already identified another "key on only" source.
Hope that helps if no-one else has more specific info.
Dan
If you're installing a MSD-6A then you'll want to remove them both. You can test my theory with a test light, and if that's the case then you can probably splice them together and run them to the small red wire on the MSD box, unless you've already identified another "key on only" source.
Hope that helps if no-one else has more specific info.
Dan
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: Help - MSD6A on C3 (danno85)
The wire from the ignition is a resistor wire. It is supposed to be about a 9 volt wire to the coil. The wire from the selonoid is there to boost the voltage to 12 volts to give it an extra "jolt" to get the car started. If the 12 volts is there during running it will burn the points up and get short point life. The MSD unit needs 12 volts. I would tape these off and find a good 12 volt source and run that wire. I must have missed your post in the C3 section. Hope this helps. I have a Crane HI6 which is wired the same way as MSD units.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
Re: Help - MSD6A on C3 (74jack)
jack,
If I am reading you correct there is an insulator there (on the coil) and if I remember correctly I hooked both those wires to the coil on a Camaro racer I had once and BURNED UP A NEW BOX!! ...redvetracr
PS Hit the MSD website, I think they have all the possible wiring diagrams shown
If I am reading you correct there is an insulator there (on the coil) and if I remember correctly I hooked both those wires to the coil on a Camaro racer I had once and BURNED UP A NEW BOX!! ...redvetracr
PS Hit the MSD website, I think they have all the possible wiring diagrams shown
