Gen light on when key in acc position - Team Camaro Tech
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post #1 of 6 (permalink) Old Jun 29th, 18, 09:35 PM Thread Starter
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Chris
 
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Gen light on when key in acc position

When I put the key into the accessory position on my 68 camaro the alternator light lights up. Is this normal and if not has anyone had this problem and an easy fix. Thanks
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post #2 of 6 (permalink) Old Jun 30th, 18, 02:31 AM
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Re: Gen light on when key in acc position

If you mean when you turn the key to first position (not engaging the starter), then yes, this is normal. This is how it works on my 67.

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post #3 of 6 (permalink) Old Jun 30th, 18, 03:11 AM Thread Starter
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Re: Gen light on when key in acc position

No when the key is turned to the on position before engaging the starter both the gen and oil pressure lights come on. Its when the key is turned counter clockwise to the Accessory position that just the gen light comes on.
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post #4 of 6 (permalink) Old Jun 30th, 18, 04:07 AM
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Any position the key is in without the car running , the light should be on.

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post #5 of 6 (permalink) Old Jun 30th, 18, 05:24 AM
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Red face Re: Gen light on when key in acc position

x-2

Saturday morning edition of "more than you wanted to know":
It is the design of the Voltage Regulator/Generator/Energizer "power triad" GM used for decades to power vehicles of all sizes.

In vehicles equipped with GEN warning lights, the bulb turns on in all key positions for a second as a self-test, to tell the operator that the bulb works.
Then a second later it goes on duty in its official job.
In your case in the ACC position, but same is true also in the ON (and in the Run mode once started) key position, it let's you know that the battery (aka the Energizer) is discharging faster than the Generator (aka Alternator) can keep up with the calls from the VR (voltage regulator) to charge the battery.

Once the vehicle is running unless the triad brain the VR says there is an issue in the charging loop you normally won't see the GEN light again until you shut down as it briefly flickers on as you move the key from Run/On position to the Off position and remove the key.

Brian


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post #6 of 6 (permalink) Old Jun 30th, 18, 01:38 PM Thread Starter
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Re: Gen light on when key in acc position

Thanks everyone for your wisdom.
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