MSD digital Window switch help?!
Thread Starter
Race Director
Joined: Jan 2003
Posts: 14,285
Likes: 0
From: Houston, Tx Got traction?
CI 5-6-7-8-9-10 Veteran
St. Jude Donor '07-'08
MSD digital Window switch help?!
Hey guys, i helped a buddy of mine install a nytrex sytem into his car. I've got it wired up with an arming and WOT throttle control the switched power to the relay. I tested this with a meter and this seems to be working correctly.
I checked the always on power to the relay and it's good. I checked the connection of the relay to the solenoids, that's good.
The issue i keep getting hung up on is this MSD window switch. I set the window switch to 4cyl, and it gives me the proper reading on its display.
When i check the "switched ground" <yellow wire> I seem to always have at least 9volts <higher when the car is on>. I can't seem to detect an opening of the ground.
Even though my volt meter can detect a ground coming through the window switch, it doesn't seem to open the solenoids.
Do you guys have any advice for testing the window switch? Any tricks that i may have missed besides the 4cylinder set up?
Any help would be appreciated.
Thanks,
Chris Wetmore
I checked the always on power to the relay and it's good. I checked the connection of the relay to the solenoids, that's good.
The issue i keep getting hung up on is this MSD window switch. I set the window switch to 4cyl, and it gives me the proper reading on its display.
When i check the "switched ground" <yellow wire> I seem to always have at least 9volts <higher when the car is on>. I can't seem to detect an opening of the ground.
Even though my volt meter can detect a ground coming through the window switch, it doesn't seem to open the solenoids.
Do you guys have any advice for testing the window switch? Any tricks that i may have missed besides the 4cylinder set up?
Any help would be appreciated.
Thanks,
Chris Wetmore
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Find cheap test light. Connect one end to a 12 volt fused source. Connect the ground ed to the yellow lead from the MSD. Adjust the window to operate between 1300-2000 rpms. Then by blipping the throttle in nuetral (by hand) and activating the microswitch by hand, the test light should light when only in the rpm window.
Thread Starter
Race Director
Joined: Jan 2003
Posts: 14,285
Likes: 0
From: Houston, Tx Got traction?
CI 5-6-7-8-9-10 Veteran
St. Jude Donor '07-'08
Originally Posted by JoeyG
Find cheap test light. Connect one end to a 12 volt fused source. Connect the ground ed to the yellow lead from the MSD. Adjust the window to operate between 1300-2000 rpms. Then by blipping the throttle in nuetral (by hand) and activating the microswitch by hand, the test light should light when only in the rpm window.
Heel & Toe
Joined: Jul 2005
Posts: 22
Likes: 0
From: JOLIET IL
i had a similar problem on my car and over all was not happy with the window switch because if there is a problem the nos will continue to spray so long as you are in that rpm window.
i now have wired both a wide open switch (runs off voltage from throttle motor) with the window switch. if you wanted to
you could just run the wide open switch. (nitrous express is the only one that makes a wide open switch for the c5's)
i now have wired both a wide open switch (runs off voltage from throttle motor) with the window switch. if you wanted to
you could just run the wide open switch. (nitrous express is the only one that makes a wide open switch for the c5's)
Thread Starter
Race Director
Joined: Jan 2003
Posts: 14,285
Likes: 0
From: Houston, Tx Got traction?
CI 5-6-7-8-9-10 Veteran
St. Jude Donor '07-'08
Yes, this is a digital msd window switch
Making your own WOT switch it pretty easy, with a micro switch.
This system is set up with a arming switch and WOT supplying the switched power to the relay. The Window switch supplies the ground to the relay. Then of course the relay has a constant power source, and then connect's to the power on the solenoids. The solenoids are then grounded.
I can't seem to get the system to fire. I pulled the relay off last night, and with a volt meter tested the 4 different wires. I put power to the solenoids, they fired. I recieved power from the arming and wot switch. Then I checked the power from the always on, and the ground on goign to the window switch. it seemed as though i always had a little bit of ground. which really confuses me as to why the system isn't firing.
Thursday night i'm going to try the light, and probably call MSD for some tech help.
Chris
Making your own WOT switch it pretty easy, with a micro switch.
This system is set up with a arming switch and WOT supplying the switched power to the relay. The Window switch supplies the ground to the relay. Then of course the relay has a constant power source, and then connect's to the power on the solenoids. The solenoids are then grounded.
I can't seem to get the system to fire. I pulled the relay off last night, and with a volt meter tested the 4 different wires. I put power to the solenoids, they fired. I recieved power from the arming and wot switch. Then I checked the power from the always on, and the ground on goign to the window switch. it seemed as though i always had a little bit of ground. which really confuses me as to why the system isn't firing.
Thursday night i'm going to try the light, and probably call MSD for some tech help.
Chris
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
I never tested the MSD for any kind of leakage. The way you described you system wiring, sounds correct in operation. One thing to think of with digital meters, is they load circuits differently than an actual load would. try the test light and see what it does. If it doesn't work, then call MSD. By the way, I've never had a problem with mine.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski