Msd 2 step question
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
I tapped into my brake light switch. I've got an auto. The signal wire is on a toggle so after I release the brake I shut off the toggle. Obviously otherwise if I tapped the brake the 2 step would activate. At least thats the theory, I haven't tapped the brake with the 2 step activated while making a pass..
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
Thanks for the info. But I really want this tied into my clutch. I'm just not sure if the clutch switch completes a ground circuit. Opens a ground circuit. closes a 12 v circuit. Or breaks a 12 v circuit.
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
Not on this setup. This is in the instructions provided..
The LS 2-Step has a built-in rpm drop circuit that prevents the low rpm limit from activating during gear shifts (when connected through the clutch switch). In order for the limit to activate, it must see an rpm drop of more than 1/3 the set amount. For example, if the limit is set at 3,000 rpm, the limiter will not activate unless it sees more than a 1,000 rpm drop.
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
I did some testing and may have figured it out. Purple wire on the clutch switch is the wire that needs to be grounded to make the starter turn over. Maybe others can shed some light but it looks like it is a normally open ground switch??
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Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
OK. Thank you. This switch won't do what I need it to do then. My msd will let me trigger with either a ground or 12 volt source. Looks like I will need to add a switch of some type to the clutch pedal.
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
What I need is either a ground or a 12 volt source when the clutch pedal is down to the floor with the car running.
http://www.msdignition.com/WorkArea/...id=15032386403
http://www.msdignition.com/WorkArea/...id=15032386403
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
I just figured out that there are two clutch switches. One way up under the dash. And one mounted to the firewall. I want to know about the one on the firewall. What does it do? Is this the one pictured in the diagram?
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
I know what you are talking about. The white switch by the knee bolster part. Clutch position sensor I think. I had a code for that once when I put in my Tick master cylinder. Not really sure how it works though. Free bump.
