Jegs window switch ???
#1
Staging Lane
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Jegs window switch ???
looking to retire my msd pill activated rpm window switch and picked up this jegs digital window switch (http://www.jegs.com/i/JEGS+Performan...40824/10002/-1)
I have a quick question with the wiring, if someone can chime in...
Jegs instructions
Installation:
• Red wire attaches to a switched +12 Volt supply source.
• Black wire attaches to chassis ground.
• Grey wire is input for the Tachometer signal. This wire will hook up to the negative side of your ignition coil, or if you
are using a high energy CD ignition, connect to the TACH output of your ignition system to the Grey wire of the
RPM switch and NOT the coil.
• Blue wire connects to the negative/ground side of the device that you want to activate at the desired RPM. This
connection is either Normally Open (Blue wire provides ground AFTER the switch reaches desired RPM) or
Normally Closed (Blue wire is grounded UNTIL switch reaches desired RPM) according to the setting in program
mode (OFF means Normally Open and will supply ground when the selected RPM is reached, ON means Normally
Closed and the switch will open when the selected RPM is reached). Factory default is Normally Open.
My wiring looks like the picture minus the FPSS. Could I wire the Jegs window switch like the MSD? But blue to ground side 85 of the relay and grey to the PCM tach wire... and set it to 4 cyclinder mode, etc,etc .. Car is a 01 c5 A4 with nitrous outlet 100 wet plate setup
mucho thanks
I have a quick question with the wiring, if someone can chime in...
Jegs instructions
Installation:
• Red wire attaches to a switched +12 Volt supply source.
• Black wire attaches to chassis ground.
• Grey wire is input for the Tachometer signal. This wire will hook up to the negative side of your ignition coil, or if you
are using a high energy CD ignition, connect to the TACH output of your ignition system to the Grey wire of the
RPM switch and NOT the coil.
• Blue wire connects to the negative/ground side of the device that you want to activate at the desired RPM. This
connection is either Normally Open (Blue wire provides ground AFTER the switch reaches desired RPM) or
Normally Closed (Blue wire is grounded UNTIL switch reaches desired RPM) according to the setting in program
mode (OFF means Normally Open and will supply ground when the selected RPM is reached, ON means Normally
Closed and the switch will open when the selected RPM is reached). Factory default is Normally Open.
My wiring looks like the picture minus the FPSS. Could I wire the Jegs window switch like the MSD? But blue to ground side 85 of the relay and grey to the PCM tach wire... and set it to 4 cyclinder mode, etc,etc .. Car is a 01 c5 A4 with nitrous outlet 100 wet plate setup
mucho thanks
#2
Hey guys sorry to bump an old thread but I am having a hell of a time getting my damn window switch to read correctly. Just like the OP I have the jegs installed on my e30 bmw and rpm bounces around like crazy (not even remotely accurate) or doesnt even show up at all. I have tried the white tach output from the PCM and that gets it to read RPM but it is not even close. Then I tried to tap in the light blue/tealish wire on the coil (See picture: The one that is pulled out to the side on left) that also gave me the crazy bouncing around rpm, and then i tried the green with white strip (one on the back right in picture) wire and the window switch just goes through is programming mode as if the car isnt started. The window switch is wired just as the instructions in the above post. It is set to 4 cylinder mode. Any help would be greatly appreciated.
#3
Ls1tech & Truck Sponsor
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The wiring of the switch itself is good to go but I can't believe you've had so much trouble getting a clean tach signal. Especially when going off the coil pack, but I've seen some crazy things happen with electronics.
I know you have probably tired this but you didn't mention it in the post....
Have you tried going off the TB itself? < For some reason I thought the switch had a TPS hookup but it looks like it doesn't >
Also when making the connections are you using T taps/ bunt connectors or are you soldering the connections?
-Chris
I know you have probably tired this but you didn't mention it in the post....
Have you tried going off the TB itself? < For some reason I thought the switch had a TPS hookup but it looks like it doesn't >
Also when making the connections are you using T taps/ bunt connectors or are you soldering the connections?
-Chris
Last edited by NitrousExpress; 03-09-2015 at 08:52 AM.
#4
Staging Lane
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Hey guys sorry to bump an old thread but I am having a hell of a time getting my damn window switch to read correctly. Just like the OP I have the jegs installed on my e30 bmw and rpm bounces around like crazy (not even remotely accurate) or doesnt even show up at all. I have tried the white tach output from the PCM and that gets it to read RPM but it is not even close. Then I tried to tap in the light blue/tealish wire on the coil (See picture: The one that is pulled out to the side on left) that also gave me the crazy bouncing around rpm, and then i tried the green with white strip (one on the back right in picture) wire and the window switch just goes through is programming mode as if the car isnt started. The window switch is wired just as the instructions in the above post. It is set to 4 cylinder mode. Any help would be greatly appreciated.
#5
The wiring of the switch itself is good to go but I can't believe you've had so much trouble getting a clean tach signal. Especially when going off the coil pack, but I've seen some crazy things happen with electronics.
I know you have probably tired this but you didn't mention it in the post....
Have you tried going off the TB itself? Also when making the connections are you using T taps/ bunt connectors or are you soldering the connections?
-Chris
I know you have probably tired this but you didn't mention it in the post....
Have you tried going off the TB itself? Also when making the connections are you using T taps/ bunt connectors or are you soldering the connections?
-Chris
Also Ive read conflicting things on which wire from the coil I am supposed to tap into. Is it the lt blue or the green with white?
I have been using T taps which is probably part of the problem, I will soldier the next time but I want to make sure Im tapping into the correct wire.
Thanks guys
#6
Staging Lane
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I have not tried going off TB which wire should I try tap into for that one?
Also Ive read conflicting things on which wire from the coil I am supposed to tap into. Is it the lt blue or the green with white?
I have been using T taps which is probably part of the problem, I will soldier the next time but I want to make sure Im tapping into the correct wire.
Thanks guys
Also Ive read conflicting things on which wire from the coil I am supposed to tap into. Is it the lt blue or the green with white?
I have been using T taps which is probably part of the problem, I will soldier the next time but I want to make sure Im tapping into the correct wire.
Thanks guys
good luck man....
#7
Gotcha so I looks like the lt blue/tealish wire though mine does not have a white stripe (second from the left top side) is the correct wire. Guess I need to go in there and soldier to see if it will work
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#8
Ls1tech & Truck Sponsor
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Go off the main coil pack plug female side on the passenger side. There will be two row's of wires. You will need the top row < Row closest to you > and it will be the second wire from the back < or second wire from the left >. It should be a solid green wire or a light green wire w/ a white tracer.
Also for the TB TPS wire I believe it's a blue wire. < For some reason I thought the switch had a TPS hookup but it looks like it doesn't >
-Chris
Also for the TB TPS wire I believe it's a blue wire. < For some reason I thought the switch had a TPS hookup but it looks like it doesn't >
-Chris
Last edited by NitrousExpress; 03-09-2015 at 08:51 AM.
#9
FormerVendor
iTrader: (2)
Hey guys sorry to bump an old thread but I am having a hell of a time getting my damn window switch to read correctly. Just like the OP I have the jegs installed on my e30 bmw and rpm bounces around like crazy (not even remotely accurate) or doesnt even show up at all. I have tried the white tach output from the PCM and that gets it to read RPM but it is not even close. Then I tried to tap in the light blue/tealish wire on the coil (See picture: The one that is pulled out to the side on left) that also gave me the crazy bouncing around rpm, and then i tried the green with white strip (one on the back right in picture) wire and the window switch just goes through is programming mode as if the car isnt started. The window switch is wired just as the instructions in the above post. It is set to 4 cylinder mode. Any help would be greatly appreciated.
#10
Ls1tech & Truck Sponsor
iTrader: (4)
http://www.jegs.com/i/Auto-Meter/105/9117/10002/-1
You'll need a tach adapter to make that specific window switch work on your application. You can pick one of ours up and it is actually a TPS/RPM box. (Dual function.) What Chris said about the wire color is correct.
Here is a link to ours, send me a PM if you need forum pricing on it.
http://www.nitrousexpress.com/18959-...-required.html
Thanks OP,
Garrett
You'll need a tach adapter to make that specific window switch work on your application. You can pick one of ours up and it is actually a TPS/RPM box. (Dual function.) What Chris said about the wire color is correct.
Here is a link to ours, send me a PM if you need forum pricing on it.
http://www.nitrousexpress.com/18959-...-required.html
Thanks OP,
Garrett