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Choke Light

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **DONOTDELETE**, Oct 25, 2001.

    This little quirk just started earlier today. When sitting at a stop light/sign, I noticed that my "choke" light came on. As soon as I step on the gas, or put the transmission in park, the light goes off. By the way, my truck is a '86 K5 w/ a rebuilt 305 and no special modifications. Could it be a low battery? I am thinking that because I replaced the alternator about a month ago, and the battery was drained. Any ideas?

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  1. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    No, it has nothing to do with voltage. Its one that goes to your choke on your carb. Your choke could be screwy or the wire is loose/off and grounding out completing the circuit and turning the light on

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  2. dyeager535

    dyeager535 1 ton status Premium Member

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    Believe the truck choke wiring is plumbed through an oil pressure switch, so that the choke does not operate with the key on, vehicle off. If you have low oil pressure, (or maybe level?) I could see how putting it in park or revving the motor up could get the light to go off. (oil pressure would increase since the pump is spinning faster)

    Probably something much simpler, perhaps the switch is going out or the choke itself is, but hey, I know the above could be true as well.

    Dorian
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  3. Pugsley

    Pugsley 1/2 ton status

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    The oil pressure gauge/sender going out will cause the choke light to do that too - during the great sender/gauge fracas, I had the choke light coming on and off until I got a combo that worked together.

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  4. Very possibly the wiring. The light switch is on the fritz, too. Every time I turn the headlights on, the gauge lights won't come on, and the fuel gauge bottoms out. I am 99% sure that the switch is at fault. I REALLY hate dealing with wiring/electrical problems! Seems like almost every vehicle I have ever owned has had it's share of wiring glitches. Thanks for the input.

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  5. Rob 85K5

    Rob 85K5 1/2 ton status GMOTM Winner

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    This happened to to me before at 70 mph when the oil pump died and killed the motor, the choke light was all that came on.

    Rob 85K5

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