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Overheating ls1

This is a discussion on Overheating ls1 within the General Help forums, part of the LSx Technical Help Section category; Then test the relay to see if you are getting power....

  1. #21
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
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    Then test the relay to see if you are getting power.

  2. #22
    Member Bandit1's Avatar
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    i tested the relays for continuity and 0 continuity. i still dont see the fans coming on. i took it for a test drive and it hasnt overheated, i even let it sit. so i dont kno what in the hell is goin on.

  3. #23
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by Bandit1 View Post
    i tested the relays for continuity and 0 continuity. i still dont see the fans coming on. i took it for a test drive and it hasnt overheated, i even let it sit. so i dont kno what in the hell is goin on.
    That IS odd. Fans didn't come on at all. Do you have any spare relays to swap out?

  4. #24
    Member Bandit1's Avatar
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    well my buddy has an ss im gonna wait for him to finish work and swap with his car and see what happens

  5. #25
    Member Bandit1's Avatar
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    well i hope my missfortune has helped the original thread starter in diagnosing his car

  6. #26
    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by Bandit1 View Post
    well i hope my missfortune has helped the original thread starter in diagnosing his car
    Find anything with yours?

  7. #27
    Member Bandit1's Avatar
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    3 different fan relay switches, 2 four prong switches and a 5 prong switch, anyone know which switch does what?

  8. #28
    Smiles for 9.5 Years cammed goat's Avatar
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    Maybe the two four-prongers are for the individual fans and the on five-pronger is the main relay?

  9. #29
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    Quote Originally Posted by Bandit1 View Post
    3 different fan relay switches, 2 four prong switches and a 5 prong switch, anyone know which switch does what?
    Quote Originally Posted by cammed goat View Post
    Maybe the two four-prongers are for the individual fans and the on five-pronger is the main relay?
    Hold tight -- I'll go grab my book and post up what I find.

  10. #30
    Member Bandit1's Avatar
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    the problem with mine was the relay was bad. i replaced the 4 pronger in the middle and they both kicked on. i was just curious as to whick relay was what

  11. #31
    Smiles for 9.5 Years cammed goat's Avatar
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    Both kicked on, sounds like the main relay.

  12. #32
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    Ok -- looking at the schematic for the cooling fans there are three (3) relays. The 4-prong relays are Cooling Fan 1 and Cooling Fan 2. Closing the ground on either of these relays should trigger low speed fan operation. The 5-prong relay is labeled Cooling Fan 3 and it triggers high speed fan operation in conjunction with the 4-prong relays.

    There is a 40 amp fuse that feeds both Relays 1 and 2 and a 10 amp fuse for Relay 3. The relays should have power at all times as the PCM closes the ground to trigger the relays. For Relays 1 and 2 the power supply is a red wire, for Relay 3 the power supply is orange.

    Closing Relay 1 should send power to a Light Blue wire and the left cooling fan. The left and right fans are interconnected through Relay 3, so the right fan may also trigger when this is closed. A fan problem should trigger a diagnostic trouble code from what I am reading.

  13. #33
    Member Bandit1's Avatar
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    intresting, but it did not light the ses on my car

  14. #34
    Smiles for 9.5 Years cammed goat's Avatar
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    Very interesting. System seems to be daisy-chained.

  15. #35
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    ok dudes im outta here thanks for the help

  16. #36
    Smiles for 9.5 Years cammed goat's Avatar
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    Keep us posted.

  17. #37
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    It is an odd looking schematic. Relay 3 simply poles between the fans. In the closed position, Left Fan Motor Pin A and Right Fan Motor Pin B are connected. In the open position, Left Fan Motor Pin A and Right Fan Motor Pin A are connected.

  18. #38
    Stockitie Stock Stock 95camaroZNC's Avatar
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    Quote Originally Posted by Bandit1 View Post
    is there a way to test the relays? i suspect the fans r not working.
    Start your car and turn on your A/C both your high speed and normal fan should cut on in the car if they are both not cutting on then thats your problem like i suggested. If you go to a GM dealer they will test your relay, no one else like advanced or auto shops will touch testing them. If its them just replace them and your golden thats exactly what my car was doing when the fans were not working correctly. If the relays are good its the harness and you need to have it replaced or repaired. Good luck with it sir. Harness + installation ran me about 150 bucks after my friend mucked up, i was a nice guy and didnt punch him in the balls.

    Ah nm you got it under control, nice job.
    Last edited by 95camaroZNC; 07-14-2009 at 07:03 PM.

  19. #39
    Junior Member Snakes4's Avatar
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    Hey, did you remove the air dam? Is it missing? Check to see if it is there, because if it isn't your car will definitely overheat even at highway speeds.

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