Coil positive wire.
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Coil positive wire.
I replaced the wire harness from the firewall forward on my 73. Should the wire that goes to the positive on the coil be part of this? The original was a resistance wire. Someone in the past ran a different wire, that runs through the fire wall next to the speedo cable. I have not been able to trace it under the dash. I would like to replace it with a new wire. Will be working with an MSD 6A, coil, distributer. Thanks for the help.
Team Owner
Joined: Sep 2006
Posts: 31,172
Likes: 4,250
From: Westminster Maryland
Hi Frank,
There are 2 harnesses in the engine compartment…. the engine harness which has 2 coil connectors as part of it, and the forward lighting harness.
Which did you replace?
Regards,
Alan
There are 2 harnesses in the engine compartment…. the engine harness which has 2 coil connectors as part of it, and the forward lighting harness.
Which did you replace?
Regards,
Alan
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
If you are going to be using a MDS system...the factory resistance wire or the wire they added may not be used and you should run your own wiring to comply with MDS' requirements to make the system operate correctly.
You will need to find the wire the previous person added and determine it if it a correct gauge size and is the way MDS wants it used to their system.
Also...Alan71 is correct...if you are looking for the resistance wire...it is NOT in the forward lamp harness.
DUB
You will need to find the wire the previous person added and determine it if it a correct gauge size and is the way MDS wants it used to their system.
Also...Alan71 is correct...if you are looking for the resistance wire...it is NOT in the forward lamp harness.
DUB
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Coil Pos Wire
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Coil Wire
If you are going to be using a MDS system...the factory resistance wire or the wire they added may not be used and you should run your own wiring to comply with MDS' requirements to make the system operate correctly.
You will need to find the wire the previous person added and determine it if it a correct gauge size and is the way MDS wants it used to their system.
Also...Alan71 is correct...if you are looking for the resistance wire...it is NOT in the forward lamp harness.
DUB
You will need to find the wire the previous person added and determine it if it a correct gauge size and is the way MDS wants it used to their system.
Also...Alan71 is correct...if you are looking for the resistance wire...it is NOT in the forward lamp harness.
DUB
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
If you still run the stock points ignition system, then that wire should be a resistance type wire. Otherwise, under certain running conditions (higher rpm), there is excessive current being drawn through the points and early burning/wear-out will occur, not to mention possible coil damage.
If you have converted to an electronic ignition system, you wouldn't want the resistance wire, anyway.
If you have converted to an electronic ignition system, you wouldn't want the resistance wire, anyway.
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Coil wire
If you still run the stock points ignition system, then that wire should be a resistance type wire. Otherwise, under certain running conditions (higher rpm), there is excessive current being drawn through the points and early burning/wear-out will occur, not to mention possible coil damage.
If you have converted to an electronic ignition system, you wouldn't want the resistance wire, anyway.
If you have converted to an electronic ignition system, you wouldn't want the resistance wire, anyway.
