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Old 10-21-2018, 07:33 PM   #1
loubob
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Default Strange Electrical Occurence

Washed car in driveway Friday.
Dried car off with a leaf blower.
Drove back into garage.
Decided to test headlights as I recently installed 50/32 bulbs.
With engine running tried low & high beams. Ammeter showed significant discharge with each. Lights off ammeter still showed discharge. Tried again with same results.
Turned car off. Waited about 1-2 minutes and restarted car.
Tried lights and ammeter showed normal charge. Same with lights off.
I run an alternator otherwise all is original.
What could have caused this to happen?
Thanks.
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Old 10-21-2018, 07:49 PM   #2
rfitzpatrick
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Default Re: Strange Electrical Occurence

"Dried Car Off With A Leaf Blower" ???
Actually, I like that -
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Old 10-21-2018, 08:29 PM   #3
40 Deluxe
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Default Re: Strange Electrical Occurence

Water in the headlight switch, wiring, etc.?
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Old 10-21-2018, 08:47 PM   #4
30 Closed Cab PU
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Default Re: Strange Electrical Occurence

How much current, same as with headlights on or did the amps drop some with the lights off?
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Old 10-22-2018, 08:53 AM   #5
katy
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Default Re: Strange Electrical Occurence

Is the ammeter needle sticking?
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Old 10-22-2018, 09:21 AM   #6
30 Closed Cab PU
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If it was a small current, perhaps stop lamp was stuck on? If happens again look at the lamp or manually pull the brake pedal back.
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Old 10-22-2018, 09:48 AM   #7
Bill G
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Default Re: Strange Electrical Occurence

If its a self exciting alternator, you do have to rev the engine up for a second when you first start the car to get the alternator to kick in. After it does it should continue to charge even at an idle.
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Last edited by Magicbox51; 10-22-2018 at 10:00 AM.
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Old 10-22-2018, 11:15 AM   #8
Badpuppy
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Default Re: Strange Electrical Occurence

Quote:
Originally Posted by Magicbox51 View Post
If its a self exciting alternator, you do have to rev the engine up for a second when you first start the car to get the alternator to kick in. After it does it should continue to charge even at an idle.
Most likely explanation, I'd say.
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Old 10-22-2018, 02:16 PM   #9
Bruce_MO
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Default Re: Strange Electrical Occurence

I agree with Katy... my ammeter will stick occasionally when I turn lights on. Just tap the dash firmly and it frees up.
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Old 10-22-2018, 06:32 PM   #10
loubob
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Default Re: Strange Electrical Occurence

Ammeter not sticking.
I did not think to check the headlight current.
Leaf blower does an excellent job of getting the water out of tight spaces.
Appreciate all the replies.
Thanks!
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