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low coolant light

Discussion in 'The Garage' started by colbystephens, Apr 24, 2006.

  1. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    why does my low coolant light come on?

    just kidding. :rolleyes: kind of.

    my low coolant light turns on and off on quite frequently each time i drive my truck, but my coolant is full. on my 6.2, where is the level sensor? what should i be looking for to fix it?
     
  2. BranndonC

    BranndonC 3/4 ton status

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    It comes on because an electrical current is sent to the bulb behind the dash.
     
  3. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    oh.




























    moderators these days . . . sheesh. :rolleyes: seems they'll just let anyone be one.




    j/k.




    pad.
     
  4. mountainexplorer

    mountainexplorer 1/2 ton status

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    Did I sell you a defective gauge unit?
     
  5. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    well, i ended up just swapping in the guages from the cluster you sold me into the original, umm, i don't know how to refer to it - i swapped the guages into the white guage pod b/c the circuits on the back of the one you sold me was too messed up. it's cool tho - i still saved money buying from you b/c it would have cost me a pretty penny to replace the guages i had broken, plus you got me a tach which i'll find a way to hook up. :wink1:

    any ideas, anyone???
     
  6. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    by the way, alan, it does this even when it's not attatched to the guage set - just dangling from the wire.
     
  7. Muddytazz

    Muddytazz 1 ton status

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    Ah, the joys of electrical gremlins
     
  8. jarheadk5

    jarheadk5 1/2 ton status

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    I think the coolant level sensor is the single-wire gadget on the right-side radiator tank, below the heater hose fitting. Last time I ran mine, I had enough coolant in the radiator to cover that sensor, but I still got the light intermittently. Probably a grounding issue...
     
  9. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    i bet you're right. i thought that was the sensor. i'll have to take a look.
     
  10. rich

    rich 1/2 ton status

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    I swapped radiators and don't have a place for that sensor anymore (and I don't need it, so don't care). But the low coolant light stays on all the time. Is there an easy way to trick it, other than sticking the sensor in some coolant? I tried grounding the sensor and grounding the sensor wire, and got no change, light still on.
     
  11. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    Maybe you could ground it through a resistor, or just use a resistor and skip the sensor? No idea what value to try, but maybe somebody can tell you, or else they could tell me I'm wrong.
     
  12. steve_kibbe

    steve_kibbe 1/2 ton status

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    Oldest trick in the book.......Remove the bulb:haha:
     
  13. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    tried that too. ;)
     
  14. jarheadk5

    jarheadk5 1/2 ton status

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    X2...:D
     
  15. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    I'll look in the shop manual and see if I can get any clues about that resistance value.

    EDIT: I didn't see anything in there, but I just took a quick look through the book.
     
  16. Pookster

    Pookster 1/2 ton status

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    remove the bulb. :)

    Other than that, I have the same light- issue is, I dont know where the previous PO put the wire, or how the wire is run- I have the sensor, but I don t know how to hook it up.
     

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