MSD Digital 6 Plus - Trigger Wire Voltage

FSA1673 · 11-08-2018, 10:19 AM

I have a small voltage reading on the trigger wire that is usually used to turn on the MSD box when the box is hooked up to the battery. It is roughly 0.5 volts. Should there be voltage coming from the box to the trigger wire? It is creating a bit of a draw on my system when sitting for long periods. I isolated the box on the bench with no other sources than a battery and still reading a small amount of voltage on the trigger wire.

FireSale · 11-08-2018, 01:20 PM

If it's one of the capacitive discharge (CD) boxes, there is a component in the box that stores voltage and releases it at a certain trigger level. Kind of like a high voltage battery in the box. It might be leaking the voltage you see. Disconnect the MSD box from the battery wire and see if the trigger still reads voltage.

EDIT: I'll put a volt meter to my digital 7 today and see it the trigger reads voltage with everything off.

11-08-2018, 10:19 AM	#1
FSA1673 Junior Member Join Date: Jan 2010 Posts: 82 Likes: 0 Liked 12 Times in 6 Posts	MSD Digital 6 Plus - Trigger Wire Voltage I have a small voltage reading on the trigger wire that is usually used to turn on the MSD box when the box is hooked up to the battery. It is roughly 0.5 volts. Should there be voltage coming from the box to the trigger wire? It is creating a bit of a draw on my system when sitting for long periods. I isolated the box on the bench with no other sources than a battery and still reading a small amount of voltage on the trigger wire.

11-08-2018, 01:20 PM	#2
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 127 Posts	Re: MSD Digital 6 Plus - Trigger Wire Voltage If it's one of the capacitive discharge (CD) boxes, there is a component in the box that stores voltage and releases it at a certain trigger level. Kind of like a high voltage battery in the box. It might be leaking the voltage you see. Disconnect the MSD box from the battery wire and see if the trigger still reads voltage. EDIT: I'll put a volt meter to my digital 7 today and see it the trigger reads voltage with everything off. __________________ Dale Shearon 68 Mustang 6394 Last edited by FireSale; 11-08-2018 at 01:23 PM.