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Thread: need help wiring!!

  1. #41
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    Is the starter solenoid wire hooked up as original or did you splice it into the nelson harness? If in the Nelson harness, did you hook the power wire for the relay directly to a non-switched 12v source with a wire as large as the wire coming off the relay?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #42
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    i hooked up the 4.3 starter solenoid wire to the 5.3 starter. that shouldnt be an issue right because its just to complete the circut so it will crank over? i used a test light and the red wire going into the starter relay on the fuse center is a 12v constant... the small pink wire that goes to the starter relay only has power when the ignition is being cranked. there is a small black wire which i assume is a ground? and then the big purple wire... should there be 12v going to the purple wire at any point and time? i guess im just kind of confused because nothing has really changed with the starter and it worked fine before... any ideas?
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  3. #43
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    The purple wire gets battery voltage when the ignition switch is in the start position.
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  4. #44
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    Quote Originally Posted by GMCwantsLS1 View Post
    The purple wire gets battery voltage when the ignition switch is in the start position.
    yeah i understand that.... but i dont get any power when i crank the key... what is causing this? im kind of lost.... i dont understand why it worked before and now its still the same wire and wont work... is there a fuse for it anywhere or something?
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  5. #45
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    Quote Originally Posted by RedHeartbeat View Post
    Is the starter solenoid wire hooked up as original or did you splice it into the nelson harness? If in the Nelson harness, did you hook the power wire for the relay directly to a non-switched 12v source with a wire as large as the wire coming off the relay?
    ALSO my truck is MANUAL and would a clutch position sensor have anything to do with my problem???? the plug going to the clutch is hooked up. just figured id mention it.


    well heres the issue my dad was just helping me out with his volt meter... under the fuse block where the wires go into the starter relay there is a red 12 v. constant which does read the 12v. there is the pink and black wire which reads 12v when the ignition is on. there is the thick purple wire which we cant get any signal from and there is a small black wire but its not a ground do you know where this wire goes? it has power to it... i have the factory 4.3 starter solenoid wire hooked up...should i change this to the 5.3 wire and cut the 4.3 on off? is that how it would work or can i just T into the original at the fuse block?

    my dad also got a piece of wire and put it to the positive on the battery and then touched it to the part of the purple wire i stripped under the fuse block and it cranks the starter so there has to be something missing in between. i cleaned all the grounds yesterday and the battery was reading roughly 12-13 volts on my guages. is there anything else that will prevent this from working that i just dont know about?
    Last edited by Wtfan18; 05-26-2008 at 01:18 PM.
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  6. #46
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    you are pressing the clutch pedal down while trying to start it right? There should be a relay for the starter circuit in your system somewhere.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  7. #47
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    Kyle, You should have a black ground wire going to the starter relay, the opposite side should have a purple wire going to the CPP switch (Clutch pedal position), a purple wire to the starter solenoid, and a red wire on the opposite side constant 12 volt. The purple wire coming off of the CPP goes to the fuse block (crank fuse 8 - 10a) which loops to a yellow wire that goes to the ignition switch.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  8. #48
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    Quote Originally Posted by NITROUS View Post
    Kyle, You should have a black ground wire going to the starter relay, the opposite side should have a purple wire going to the CPP switch (Clutch pedal position), a purple wire to the starter solenoid, and a red wire on the opposite side constant 12 volt. The purple wire coming off of the CPP goes to the fuse block (crank fuse 8 - 10a) which loops to a yellow wire that goes to the ignition switch.
    hmm i tried to call you today after i got your voice mail i may have to try again this week. i didnt get an answer and no answering machine. where is the clutch pedal position switch located? its the plug in located right on the clutch pedal itself correct?
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

  9. #49
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    Did you try my house or work? I was cleaning the pool yesterday but I had the phone outside. Here's what the switch looks like and it should be down by the pedal.
    Last edited by NITROUS; 05-27-2008 at 08:39 AM.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  10. #50
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    yeah thats the one i plugged in. i called the number you left in the voicemail. ill call you again tonight. and hopefully we can get this thing figured out.
    09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,

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