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2004-2007 Cadillac CTS-V General Discussion Discussion, How to replace starter's piggy back connector in Cadillac CTS-V Series Forum - 2004 - 2007; Originally Posted by 1badCTS-V Could anybody tell me what that wire does, and could it cause a 'battery not charging' ...
  1. #16
    Slithering_Joe's Avatar
    Slithering_Joe is offline Cadillac Owners Enthusiast
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    Re: How to replace starter's piggy back connector

    Quote Originally Posted by 1badCTS-V View Post
    Could anybody tell me what that wire does, and could it cause a 'battery not charging' indicator on the NAV screen? I've had my battery and alternator tested, and both checked out, but that little wire in the pictures is fried and barely hanging on.

    Thanks,
    Mark
    That single wire to the starter provides power to the starter's internal solenoid when the starter relay in the underhood fuse box is activated/energized. For charging issues you need to verify the wiring for the regulator circuit between the PCM and the alternator's internal regulator (LS6: Gray wire, Orange wire).

  2. #17
    1badCTS-V is offline Cadillac Owners Member
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    Re: How to replace starter's piggy back connector

    Quote Originally Posted by Slithering_Joe View Post
    That single wire to the starter provides power to the starter's internal solenoid when the starter relay in the underhood fuse box is activated/energized. For charging issues you need to verify the wiring for the regulator circuit between the PCM and the alternator's internal regulator (LS6: Gray wire, Orange wire).
    Thanks! With the engine running, is that a 12V signal?

  3. #18
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    Re: How to replace starter's piggy back connector

    Quote Originally Posted by 1badCTS-V View Post
    Thanks! With the engine running, is that a 12V signal?
    Make sure the starter terminals and the battery terminals are tight and clean. Clean doesn't just mean the outside surface of the terminals. A poor connection will raise havoc in all sorts of diagnostic quests.

    Alternator:
    The FIELD or "F" connection for the alternator is the GRAY wire. The voltage on this varies depending on how much current the field is creating.
    The LIGHT or "L" connection, ORANGE wire, (conventionally used for the idiot charge Light) is the turn-on for the alternator.
    Without a +12V signal to the "L" terminal the alternator will not charge. It looks like logic in the PCM will provide this signal to the internal voltage regulator of the alternator. Many cars use the ignition switch directly through the charge idiot-light. Assuming that the alternator was checked out properly, I would check the wiring and connections. One special note is that "F" won't work if "L" is not working properly.

    Starter:
    If you are talking about the single wire leading to the starter, this will only have +12V when the ignition key is turned to "START" AND the starter relay is switched on assuming everything else within the circuit is OK. The PCM has control of the starter relay. In other words, the PCM has the "final say" on whether to energize the starter. Normally, no voltage is found on this lead.

  4. #19
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    Re: How to replace starter's piggy back connector

    Mine just crumbled apart in my hands too! It was so bad, I couldn't even tell what wire went were.
    So just to be sure, there are only two wires going to the solenoid, correct? the one pigtail that crumbled (about a 12 guage?) and the thicker wire that goes on the solenoid terminal end, tightened with a nut. Is that right?

  5. #20
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    Re: How to replace starter's piggy back connector

    Quote Originally Posted by coltmckinney View Post
    Mine just crumbled apart in my hands too! It was so bad, I couldn't even tell what wire went were.
    So just to be sure, there are only two wires going to the solenoid, correct? the one pigtail that crumbled (about a 12 guage?) and the thicker wire that goes on the solenoid terminal end, tightened with a nut. Is that right?
    I have not yet had to replace that wiring on my V, but as I read the Service Manual material (and diagram) the solenoid is connecting by a singe (small0 wire and the 12 gauge wire (cable) attaches to the starter itself.

  6. #21
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    Re: How to replace starter's piggy back connector

    Quote Originally Posted by coltmckinney View Post
    Mine just crumbled apart in my hands too! It was so bad, I couldn't even tell what wire went were.
    So just to be sure, there are only two wires going to the solenoid, correct? the one pigtail that crumbled (about a 12 guage?) and the thicker wire that goes on the solenoid terminal end, tightened with a nut. Is that right?
    Correct - I'm in the process of replacing mine, just waiting on parts...

  7. #22
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    Re: How to replace starter's piggy back connector

    Now I'm stuck at the cat. Can't get it off. I successfully removed the two nuts at the down pipe and the 2 nuts on the other side of the cat. I can't pull it down. Is there something downstream I still need to remove??

  8. #23
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    Re: How to replace starter's piggy back connector

    That sounds like all the hardware you have to take off. Is it wedged where it ties to the catback - there is a donut/double cone gasket there that might jam. Also the thing does have some weight to it.

  9. #24
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    Re: How to replace starter's piggy back connector

    Thanks for that, Darkman. I realized I had to remove the two nuts on the catalytic converter to exhaust manifold on the driver side too then down it all went. You're right, it is heavy...
    Still can't get the starter out because the rear most bolt on the exhaust manifold is preventing removal of it.... so I got out my sawzaw and began cutting away at the lower 1/3 of that bold but I think it's made of diamonds or something becausse I've gone through two sawzaw blades so far and only 1/2 way through the bolt. SO! I'm off to Depot to buy more blades.

    So now that I essentially have the cats fully removed, I looked at my Summit mag. Would be nice to just put in some high-flo cats but none seems like they are direct replacements. ie) looks like I'd have to buy connectors and collectors and such.

    Then ALSO while I'm at it, may as well install some quick-time cutouts, right?? Wouldn't that be cool. I probably won't though. Don't know what size to get and not sure how to install...

  10. #25
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    Re: How to replace starter's piggy back connector

    Thanks for that, Darkman. I realized I had to remove the two nuts on the catalytic converter to exhaust manifold on the driver side too then down it all went. You're right, it is heavy...
    Still can't get the starter out because the rear most bolt on the exhaust manifold is preventing removal of it.... so I got out my sawzaw and began cutting away at the lower 1/3 of that bold but I think it's made of diamonds or something becausse I've gone through two sawzaw blades so far and only 1/2 way through the bolt. SO! I'm off to Depot to buy more blades.

    So now that I essentially have the cats fully removed, I looked at my Summit mag. Would be nice to just put in some high-flo cats but none seems like they are direct replacements. ie) looks like I'd have to buy connectors and collectors and such.

    Then ALSO while I'm at it, may as well install some quick-time cutouts, right?? Wouldn't that be cool. I probably won't though. Don't know what size to get and not sure how to install...

    IMG_1356.JPG

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    Re: How to replace starter's piggy back connector

    I ended up being able to maneuver the starter out with just the cats/exhaust out of the way. Took some effort to twist it the right way, but didn't need to shave a bolt. I ended up having to basically drop all of the exhaust hangers and pull the exhaust back to get the cat out. Just too tight otherwise.

  12. #27
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    Cool Re: How to replace starter's piggy back connector

    I finally was able to cut that bolt off using a Dewalt blade. Then the starter came right out. I bought a roll of silver thermal tape and wrapped the solenoid and wiring then put in the new starter and put everything back together again. She started right up!!

  13. #28
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    Re: How to replace starter's piggy back connector

    I am not sure if you guys know, but the CTSV starter is the only starter that I have found that uses this connector.

    My solution and what I would suggest. Go get a starter from a 6.0 Chevy truck. It takes a ring terminal.

    With your busted connector, remove all plastic and crimp on a ring terminal and you are forever done.

    I wrapped mine as well and it is much quieter and now protected.

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