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I have an '01 Z06 (so 6 speed car) and installed an LNC2000. The timing retard seems to be working fine, but the car won't even start with the 2 step wired in no matter how I configure it.
On page 12 of the LNC2000's instructions it shows you how to wire it in to the clutch switch, which is how I want it, but it shows the wire colors for a 1999 Trans Am., which are Purple and Green, whereas the wires for a C5Z are Purple and Yellow.
Going off those instructions, I have it wired in the following way:
Relay terminal 86 to ground
Relay terminal 85 to the yellow 12V+ activation wire on the LNC2000, and also to the yellow wire on the clutch switch itself
Relay terminal 87 to the yellow clutch switch wire that was cut as per the instructions
Relay terminal 30 to the purple clutch switch wire that was cut as per in the instructions
To the purple wire for the clutch switch itself, I have run a good (verified) 12v+ key on source
The car won't even crank (as if the clutch is not being depressed) with it wired that way. I tried switching terminals 87 and 30 because perhaps due to not having the correct diagram for a C5 they were reversed, and I get the same exact result.
I tried calling Lingenfelter tech support and they seemed stumped and said they would see if they could find a proper diagram and get back to me, and that was a couple hours ago.
Any ideas from someone who has wired this on a C5Z? I know there are guys here with it working somehow. Thanks!
If I twist the yellow and purple clutch switch wires together that I cut (as per the instructions) the car will start since that is essentially bypassing the clutch switch starter feature.
My 12V key on is good as I tested it at the clutch switch, and the yellow 12V activation wire that goes into the LNC2000 will light the test light each time the clutch is pressed, so the clutch switch is operating as it should as well.
If I hook everything back up to factory the car starts fine.
The Lingenfelter instructions SUCK as it will not work the way they have it diagramed out, and when I called tech support, they couldn't offer any assistance on how to make it work using the clutch switch on a C5 Corvette, so essentially I just have a really expensive timing retard.
Has anyone on planet earth gotten the two step launch control to work using the clutch switch on a C5 Corvette?
Sorry to hear you are having difficulty getting this to work. This wiring configuration does work on a C5 just like it works on a 1999-2002 F-body (Camaro & Firebird). The C5 Corvette has similar type of clutch switch and wiring as the F-body, just different wire colors. This is how customers and ourselves have been wiring into the clutch switch on the C5 since around 2007 when we released the LNC-001.
In the clutch switch wiring diagram on page 12 of the LNC-2000 instructions, the wire colors are for the F-body application. The C5 wiring is purple and yellow as follows (instead of purple and green):
Hope this helps.
So you would have cut the purple and yellow wires before the connector that goes into the switch. Then the purple wire on the connector you just cut off goes to a +12 volt key on power source. The yellow wire on that same connector goes to the LNC-2000 +12V activation wire and also to pin 85 on a standard automotive relay.
The purple wire on the vehicle side of the harness goes to pin 30 on the relay.
The yellow wire on the vehicle side of the harness goes to pin 87 on the relay (normally open side of the relay).
Pin 86 of the relay should be connected to a ground source.
Nothing should be connected to pin 87A (normally closed) on the relay.
If that doesn't work, test the following:
Check the LNC-2000 activation light when you press the clutch in. The activation light should come on. If the light comes on and you can't start the car, the issue is likely with the relay wiring.
If the light does not come on when you presses in the clutch pedal, check the wire colors to see if he is tapping into the clutch switch.
Assuming you are using a conventional mechanical relay you should be able to hear/feel the relay switch when you press in the pedal. You can also confirm operation of the relay using a voltmeter by checking continuity between 30 and 87. It should be an open circuit with the pedal released and a closed circuit (showing continuity) when the pedal is depressed.
Originally Posted by NosLaser
If I twist the yellow and purple clutch switch wires together that I cut (as per the instructions) the car will start since that is essentially bypassing the clutch switch starter feature.
My 12V key on is good as I tested it at the clutch switch, and the yellow 12V activation wire that goes into the LNC2000 will light the test light each time the clutch is pressed, so the clutch switch is operating as it should as well.
If I hook everything back up to factory the car starts fine.
The Lingenfelter instructions SUCK as it will not work the way they have it diagramed out, and when I called tech support, they couldn't offer any assistance on how to make it work using the clutch switch on a C5 Corvette, so essentially I just have a really expensive timing retard.
Has anyone on planet earth gotten the two step launch control to work using the clutch switch on a C5 Corvette?
I appreciate the reply, but that is exactly how I have it outlined in my first post, and no dice. I went over the wires for hours and tried 3 different brand new relays and the car still would not even crank with it wired how you posted.
I currently have it working, but what I did to make it work was simply connect the two wires of the body side harness (the purple and yellow) together, so now the car will start without the clutch being depressed, and the two step will work off the clutch switch.
I didn't want to do it that way because I like the safety of having the depress the clutch to start the car, but it is what it is and at least now I can use the two step feature.
Could you tell us if the relay is activating? From what you are describing it seems like it has to be that the relay isn't activating and once we confirm that maybe we can figure out why.
Also, are you using a conventional mechanical relay or a solid state relay?
I agree, I wouldn't want the clutch switch starter interrupt disabled either (although I was recently surprised to find out many non GM cars don't have that feature).
Originally Posted by NosLaser
I appreciate the reply, but that is exactly how I have it outlined in my first post, and no dice. I went over the wires for hours and tried 3 different brand new relays and the car still would not even crank with it wired how you posted.
I currently have it working, but what I did to make it work was simply connect the two wires of the body side harness (the purple and yellow) together, so now the car will start without the clutch being depressed, and the two step will work off the clutch switch.
I didn't want to do it that way because I like the safety of having the depress the clutch to start the car, but it is what it is and at least now I can use the two step feature.
Could you tell us if the relay is activating? From what you are describing it seems like it has to be that the relay isn't activating and once we confirm that maybe we can figure out why.
Also, are you using a conventional mechanical relay or a solid state relay?
I agree, I wouldn't want the clutch switch starter interrupt disabled either (although I was recently surprised to find out many non GM cars don't have that feature).
I can hear it clicking when the clutch is pressed, and I have tried 3 different brand new relays all with the same exact result. It's super odd because according to the diagram, there is no reason it shouldn't work. I'm stumped.
Sorry to hear you are having difficulty getting this to work. This wiring configuration does work on a C5 just like it works on a 1999-2002 F-body (Camaro & Firebird). The C5 Corvette has similar type of clutch switch and wiring as the F-body, just different wire colors. This is how customers and ourselves have been wiring into the clutch switch on the C5 since around 2007 when we released the LNC-001.
In the clutch switch wiring diagram on page 12 of the LNC-2000 instructions, the wire colors are for the F-body application. The C5 wiring is purple and yellow as follows (instead of purple and green):
Hope this helps.
So you would have cut the purple and yellow wires before the connector that goes into the switch. Then the purple wire on the connector you just cut off goes to a +12 volt key on power source. The yellow wire on that same connector goes to the LNC-2000 +12V activation wire and also to pin 85 on a standard automotive relay.
The purple wire on the vehicle side of the harness goes to pin 30 on the relay.
The yellow wire on the vehicle side of the harness goes to pin 87 on the relay (normally open side of the relay).
Pin 86 of the relay should be connected to a ground source.
Nothing should be connected to pin 87A (normally closed) on the relay.
If that doesn't work, test the following:
Check the LNC-2000 activation light when you press the clutch in. The activation light should come on. If the light comes on and you can't start the car, the issue is likely with the relay wiring.
If the light does not come on when you presses in the clutch pedal, check the wire colors to see if he is tapping into the clutch switch.
Assuming you are using a conventional mechanical relay you should be able to hear/feel the relay switch when you press in the pedal. You can also confirm operation of the relay using a voltmeter by checking continuity between 30 and 87. It should be an open circuit with the pedal released and a closed circuit (showing continuity) when the pedal is depressed.
LNC2000 Two Step wiring problems
