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Electrical Discuss anything related to OEM & aftermarket electrical devices including: stereos, speakers, video, batteries, starters, the body control module, lighting, etc.

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Old 07-25-2012, 08:54 PM   #1 (permalink)
20duramax05
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Windows,door locks don't dont work and don't shut off properly

It started on Monday went to leave unlocked truck with key fob started fine. tried to put windows down would not go down tried all doors to put windows down but no luck then tried door locks with key fob and button on door and they didn't work. Tried to turn a/c but blower wouldn't work if put on five its sounds like it tries to work but doesn't blow. Of a/c is turned on and open good u can see a/c clutch kick in and out. So I parked it seeing how it was 90 out. Looked at it today truck starts well running comes up on dash service 4wd then goes away then say service break system then goes away. Went to shut truck off turn key back one click which would be acc power and truck did not shut off went to running werid turned key back on ran fine only way it would shut down is to turn key clear off. Starred it again and it started and shut off like normal tried a third time and wouldn't shut down right again. I hooked programmer edge juice attitude everything the same but now have ses light. Opened hood and could hear relay clicking so checked and it was edu relay. Can anyone help me greatly apperciated I read it could be rubbed wires by alt or bad ground by driver front fender? Thank for any and all help

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Old 07-27-2012, 03:21 PM   #2 (permalink)
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Well I have had battery's unhooked since Wednesday morning Hooked them back up edu relay clicked couple times started truck and everything works? Any one have any ideas of what is goin on can someone tell me were the main body to frame ground is?

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Old 07-27-2012, 03:26 PM   #3 (permalink)
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Clean the frame grounds at two locations. Under the driver's battery, on the frame ear (1 connection by the core support mount, accessible from underneath), and the other location is the frame ear under the driver (two anchor connections).
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Old 07-28-2012, 03:39 PM   #4 (permalink)
20duramax05
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Well grounds look good running fine gonna have load tested on battery's. Another thing I noticed is when truck was still acting up it would not rev over 2000rpm seemed like it had a rev limiter?
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Old 07-28-2012, 05:09 PM   #5 (permalink)
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Have the batteries been changed? Sounds stupid, but mine was having some stupid issues, changed the batteries and all's well now. 8 years on the ones from the factory isn't too bad I guess.
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Old 07-29-2012, 09:41 AM   #6 (permalink)
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I honestly don't know I gonna say they prolly are. I took it to auto zone had each battery load tested there little tester says battery's are bad but are holding 100% charge makes no sense to me?
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Old 07-29-2012, 12:52 PM   #7 (permalink)
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Originally Posted by 20duramax05 View Post
I honestly don't know I gonna say they prolly are. I took it to auto zone had each battery load tested there little tester says battery's are bad but are holding 100% charge makes no sense to me?
No, they're probably holding 100% of voltage on a charge but after eight years they're probably holding under 75% of current on a charge.
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Old 07-30-2012, 02:17 PM   #8 (permalink)
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Well truck ran good all weekend everything worked fine till this morning started truck blower worked and was on. Tried to put window down it moved down about 1/2 much then stopped with a clicking sound. Then blower stopped workin as well as windows and door locks? Anyone got anything for me ?
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Old 08-04-2012, 08:35 PM   #9 (permalink)
20duramax05
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Well with new batterys everything worked. Started it again 4hrs later windows door locks and windows don't work. Can anyone tell me were the computer is located exactly and is it possible to get to the plugs for it? Was told to check there for corrosion?
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Old 08-05-2012, 11:36 AM   #10 (permalink)
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Which computer.

TCM is mounted to radiator on driver side. ECM is mounted under the TCM and battery. FICM is mounted on pass side under alternator.

BCM is mounted inside the cab under the steering column.

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