Very odd electrical issues

[Zepp]

2000 esky.

So I have noticed that when turning off the key the radio stays on, as it should. If I open the door nothing powers off. I've also recently discovered my wipers will work with the key off. If I keep the drivers door open and cycle the key to run and back off everything powers down.

If the door is open and key is shut off everything powers down. If the door is closed, key turned off, then opening the door, radio stays on and wipers are functional. Not really sure what to make of it.

 

[1998_K1500_Sub]

2000 esky.

So I have noticed that when turning off the key the radio stays on, as it should. If I open the door nothing powers off. I've also recently discovered my wipers will work with the key off. If I keep the drivers door open and cycle the key to run and back off everything powers down.

If the door is open and key is shut off everything powers down. If the door is closed, key turned off, then opening the door, radio stays on and wipers are functional. Not really sure what to make of it.

Umm... a "Cadillac Style" feature, perhaps?

What's the sales brochure or service manual say about it?

Oh, look here:

"Retained accessory pwr-inc: radio, windows, front/rear wipers, aux pwr outlets"

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[Zepp]

It does say they will operate for up to 10 minutes after the key is turned to the off position or the door is opened. Neither will kill the power to them unless the door is already opened when the key is turned to the off position.

 

[1998_K1500_Sub]

It does say they will operate for up to 10 minutes after the key is turned to the off position or the door is opened. Neither will kill the power to them unless the door is already opened when the key is turned to the off position.

The owner's manual in the glovebox should provide some information on the topic as well, if it's still there. A .pdf is probably available on the 'net.

I wouldn't be surprised if the same feature set existed on the GMC Denali from which the Esky was a kin.

 

[Zepp]

I do have the owners manual still. The retained accessory power works, until it's time for it to turn off. It's supposed to turn off if you open a door or wait 10 minutes. I've had it stay on long enough to kill the battery and it stays on when you open the door is my issue.

 

[1998_K1500_Sub]

I do have the owners manual still. The retained accessory power works, until it's time for it to turn off. It's supposed to turn off if you open a door or wait 10 minutes. I've had it stay on long enough to kill the battery and it stays on when you open the door is my issue.

Those are body control module functions.

See this thread on GMT400, particularly the post about "Retained Accessory Power":

Escalade BCM Keyless Entry Programming and Beyond

A while back, I picked up a body control module out of a 2000 Escalade (OBS)... Been playing with it somewhat here and there, but just really got into things lately as I'm preparing to actually install it into my truck. So I decided to make a post detailing what all can be done.. And maybe...

www.gmt400.com

A Google search for "2000 escalade body control module failure" turns up interesting hits, take a look:

2000 escalade body control module failure - Google Search

 

[AK49BWL]

Hehe that's my thread. I would have said maybe your door switch broke until you said it does shut off if the door is already open. Makes me think it's a possible RAP relay failure, or the BCM controller itself... It's also possible there's a problem with the ignition switch and the accessory circuit from the ignition is still feeding the RAP circuits (radio, windows, and wipers). The RAP relay failing (integral part of the BCM) or the ignition switch feeding accessory ignition power to the BCM will cause the power to stay on until the truck dies.

 

[Zepp]

Hehe that's my thread. I would have said maybe your door switch broke until you said it does shut off if the door is already open. Makes me think it's a possible RAP relay failure, or the BCM controller itself... It's also possible there's a problem with the ignition switch and the accessory circuit from the ignition is still feeding the RAP circuits (radio, windows, and wipers). The RAP relay failing (integral part of the BCM) or the ignition switch feeding accessory ignition power to the BCM will cause the power to stay on until the truck dies.

I'll take a peak at the RAP relay when I get a minute. Thanks

 

[AK49BWL]

Good luck....... It's inside the BCM, which is buried under the center console. You have to remove the entire console to get the BCM out at all, and THEN take the BCM apart to see the relay.

 

[Zepp]

Good luck....... It's inside the BCM, which is buried under the center console. You have to remove the entire console to get the BCM out at all, and THEN take the BCM apart to see the relay.

Sounds like a weekend morning project.