Where to wire stuff into? MBEC -MID BEC - Relay Center 2003-2007 - Chevy and GMC Duramax Diesel Forum
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Old 12-09-2010, 01:32 PM   eBay Motors  #1 (permalink)
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Where to wire stuff into? MBEC -MID BEC - Relay Center 2003-2007

The MBEC is under your dash on the drivers side. There is a small black plastic nut that you can take off without a tool and remove the cover. Inside is the SEO connector. (this is also the area where the elec brake plugs in)

You can get a harness that plugs into the SEO - C8 position

This plug has spots for you to wire in aftermarket stuff.
There is a
30 amp Hot all times
10 amp hot run/start
10 amp hot run/accy
15 amp hot all times
ground

here is the link with pics, your looking for page B-8

http://www.gmupfitter.com/publicat/2...lectric_CK.pdf
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Old 12-09-2010, 01:34 PM   eBay Motors  #2 (permalink)
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Good info
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Old 12-09-2010, 01:36 PM   eBay Motors  #3 (permalink)
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good info. sticky!
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Old 12-09-2010, 01:44 PM   eBay Motors  #4 (permalink)
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The lmm's have this too. I ordered the wrong harness a ended up with the lmm one. oops
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Old 12-09-2010, 04:37 PM   eBay Motors  #5 (permalink)
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oh bad ass thanks man
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Old 12-17-2010, 02:42 PM   eBay Motors  #6 (permalink)
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pic of lbz mbec plug

ACD# pt1268
GM# 15306107
Attached Images
File Type: jpg mbecpluglbz.jpg (44.7 KB, 1532 views)
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Old 01-28-2011, 09:05 AM   eBay Motors  #7 (permalink)
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Quote:
Originally Posted by TheStepChild View Post
The lmm's have this too. I ordered the wrong harness a ended up with the lmm one. oops
Do u have a PN# on that I need to order one for lmm
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Old 01-28-2011, 09:15 AM   eBay Motors  #8 (permalink)
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Check this #. 20791502.
And this TSB. 08-08-45-004a
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Old 01-28-2011, 09:50 AM   eBay Motors  #9 (permalink)
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Big thanks to the OP this helps me alot I am going to hook up my rear HVAC parking assist rear power outlet and wiper tonight to this location.
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Old 01-28-2011, 10:45 AM   eBay Motors  #10 (permalink)
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Great info James. Stuck.
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