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Old 03-17-2011, 10:34 AM
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Weird electrical zapping sound on power down

Anyone else hearing a weird faint electrical zapping sound when powering down your WK2? It seems to come from under the hood or behind the dash (I can't totally pinpoint it yet).

It's not a motor spin down. It sort of sounds like electrical arcing or like a starship from Star Trek powering down (seriously!!). The first few times I heard it I sniffed around for burning electronics under the hood but didn't smell anything. I examined as much wiring as I can get to without tearing things apart, and nothing is burnt or discolored.

This happens both day and night, so it's not the HID headlights turning off....
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Old 03-17-2011, 11:08 AM
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Re: Weird electrical zapping sound on power down

Check the sun visor. There have been at least 2 fires.
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Old 03-17-2011, 11:26 AM
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Re: Weird electrical zapping sound on power down

Also check out this TSB. It mentions tapping noises under the hood at key on or off.

http://www.wk2jeeps.com/tsb/tsb_wk2_1801211.pdf
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Old 03-17-2011, 03:24 PM
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Re: Weird electrical zapping sound on power down

Mine has done it from day one. It is normal. I believe it is the fuel pump relay.

Oh and you have to have the door open or open it immediately after turning off the car to hear it.
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Old 03-17-2011, 04:23 PM
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Re: Weird electrical zapping sound on power down

Quote:
Originally Posted by jeep2011 View Post
Mine has done it from day one. It is normal. I believe it is the fuel pump relay.

Oh and you have to have the door open or open it immediately after turning off the car to hear it.
OK; that makes sense. I don't hear it when I turn off "ACC", which makes me think it's not something electrical in the passenger compartment (sunroof, etc).
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