2018-2019 MSD 2-step install.

Hyper771987

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Gentleman,

My car - 2019 Mustang GT Automatic.

I have purchase the MSD-87311 2- step, and I have a few questions in regards to the install.

I have an automatic so I’m going to tap in to the brake light switch located in the brake pedal. Does anyone know which wire that is?
- I will be using the MSD 12v activation signal wire, blue/white wire.

Since it’s an 18-19 I was told to switch the #3 cylinder wires. Is that done on the harness side (before the MSD box) or on the coil pack side (after the MSD box)?.

Does it matter which way I install the main harness?... run the harness behind the engine or in front?... the instructions didn’t specify.

Thank you for the help !





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Jetnoise

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Does MSD / Holley offer any support for your application?
Looks like they have a few brands
Never called any of them before except before Holley bought out the bg demon stuff.
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Hyper771987

Hyper771987

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Tested all the wires in the brake switch harness and they all have between 10-12v going through them. Going to find a 12v source on the brake light, if that doesn’t work then I’m going to a momentary switch.
 

olaosunt

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Any updates ?
Were you able to make it work and figure out which wires to switch ?
 

Nos-pete

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Gentleman,

My car - 2019 Mustang GT Automatic.

I have purchase the MSD-87311 2- step, and I have a few questions in regards to the install.

I have an automatic so I’m going to tap in to the brake light switch located in the brake pedal. Does anyone know which wire that is?
- I will be using the MSD 12v activation signal wire, blue/white wire.

Since it’s an 18-19 I was told to switch the #3 cylinder wires. Is that done on the harness side (before the MSD box) or on the coil pack side (after the MSD box)?.

Does it matter which way I install the main harness?... run the harness behind the engine or in front?... the instructions didn’t specify.

Thank you for the help !
I have it installed on my 18 GT I will crawl under there this evening and take a pic and post to show brake wireing and if you like under hood as well?
 

bigwill90

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I have it installed on my 18 GT I will crawl under there this evening and take a pic and post to show brake wireing and if you like under hood as well?
What did u do about the #3 cylinder coil ???
 

turnswrench

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I posted instructions in my build thread for future reference.
 
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Hyper771987

Hyper771987

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I finally got to work by watching a video a guys made in FB.

Hooked up the 2 step and then a 3 relay trans brake. Botch activases by a steering button I got from Motion race works.
 

bigwill90

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I finally got to work by watching a video a guys made in FB.

Hooked up the 2 step and then a 3 relay trans brake. Botch activases by a steering button I got from Motion race works.
You have a link to this Facebook post ?
 

nicolasfinta1

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Anyone have the video on how I’m thinking about getting it on my 2018 A10 but am so confused on how
 

turnswrench

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