bump box ms3x

[ShelbyZ24]

Has anyone configured their MS3x for a bump box to interupt the trans brake just enough to light the second bulb when staging with boost and rpm up there?

[Matt Cramer]

See this thread for how it's done:

http://www.msextra.com/forums/viewtopic ... 25&t=50135

[ShelbyZ24]

Would I be ok using nitrous output for grounding my trans brake relay. also how would I go about inverting it so it grounds the relay so the brake works then removes the ground momentarily to bump into the beams

[Matt Cramer]

How much current does your trans brake solenoid draw?

[ShelbyZ24]

How much current does your trans brake solenoid draw?

It draws a maximun of 7 amps

[Matt Cramer]

I'd use an external solid state relay.

[ShelbyZ24]

I'd use an external solid state relay.

I'm using a Chrysler one.

[ShelbyZ24]

I only have a one wire Trans brake. Right now I have the power button triggering a standard rely to ground launch in wire

[ShelbyZ24]

This is grounded for control

[dark star]

You need to wire up a relay to control the trans brake and the MS to control the ground side of the relay.

[ShelbyZ24]

Thanks that's what I'm asking how do I get the mega squirt to control a grounded to control relay see the brake is on ground then unground for the bump.

[ShelbyZ24]

I'd like to use pte4 input for bump switch. It say can be used for input or output. Do I need to use a jumper to make this an input ?

[ShelbyZ24]

Success!! It works! Thanks Matt!