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Chris Glagola

Galant VR4 Setting up input for launch control

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Hello, I am having an issue with the input for launch control. I am using the plug & play galant vr4 ecu in a 92 plymouth laser. I believe my clutch switch is bad so I'm in the process of hunting one down to install but I'm not sure on how to wire it to the ecu.  I see digital input #6 on the expansion loom is not used but do I wire the positive or the ground on the switch to the input? 

Ive tried setting up launch control based on mph using Digital input #3 (speed reference on the ecu) but for some reason it still arms the system at 20mph+ versus disarming after 10mph.

Thank you

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6 minutes ago, dx4picco said:

Put one side of the switch on a chassis ground and the other side on your DI pin

If I do this but leave the original ground for the switch untouched, shouldn't it technically be grounded through the stock harness already? Since there's a power and ground going to the switch from the factory.

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I don't know how your car is wired. I mentioned chassis ground because it is most of the time the simplest to get to. but any ground should be ok

 

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The DI's can be switched to ground or to positive, they can be set up to work either way.  So you should be able to just connect it up to the stock wiring and it will work.

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1 hour ago, Adamw said:

The DI's can be switched to ground or to positive, they can be set up to work either way.  So you should be able to just connect it up to the stock wiring and it will work.

Sweet thanks, probably just a bad switch then.

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8 hours ago, Chris Glagola said:

Sweet thanks, probably just a bad switch then.

You may also need to turn on the pull-up in the DI settings depending on how the circuit works

 

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