peterbilt wiring scematic - TheDieselGarage.com
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post #1 of 8 (permalink) Old 01-30-2010, 01:15 PM Thread Starter
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peterbilt wiring scematic

I need the wiring scematic for a 2005 357 with cat c13.Need schematics for cab and chasis and engine showing all info.Tried 2 different dealerships and they have emailed me the wrong ones each time.Working on clutch fan and is not getting signal from ecm to shut fan off.ECM keeps saying ac high pressure switch is on.Checked wiring with ohm meter to the switch and fan solenoid.No broken wires.Changed both ac switches and charged ac at dealers recomendation knowing that wasn't the problem.If any body could help i would much appriciate it.I think the driver in the ecm might have gone bad i have a test ECM but i don't want to plug in until i have correct schematics.Thanks.
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post #2 of 8 (permalink) Old 01-30-2010, 01:22 PM
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Originally Posted by acegreaser View Post
I need the wiring scematic for a 2005 357 with cat c13.Need schematics for cab and chasis and engine showing all info.Tried 2 different dealerships and they have emailed me the wrong ones each time.Working on clutch fan and is not getting signal from ecm to shut fan off.ECM keeps saying ac high pressure switch is on.Checked wiring with ohm meter to the switch and fan solenoid.No broken wires.Changed both ac switches and charged ac at dealers recomendation knowing that wasn't the problem.If any body could help i would much appriciate it.I think the driver in the ecm might have gone bad i have a test ECM but i don't want to plug in until i have correct schematics.Thanks.
Try www.supermiller.com look on the right side of the page and down to schematics (this link came from 359Kool just passing it along)

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post #3 of 8 (permalink) Old 01-31-2010, 01:40 AM
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just go in and put the ecm in test mode....connect it and see if the fan shuts off...it sounds like an ecm problem. pin 11 is the driver for the fan. this is how we check it. we have ran into this a couple of times. need to go into the parameters and check fan run time and change if needed. there is fuse in the fuse box that is marked aux fan and if the fuse is blown this will also keep the fan on. jump the high pressure switch with a paperclip on the harness side and see if the fan status will read off......

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post #4 of 8 (permalink) Old 01-31-2010, 12:31 PM Thread Starter
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Thanks for the help and link for schematics.I found a third pressure switch that was missing on the discharge hose from the compressor.The plug was taped up in the harness by the compressor.I jumped the plug and the fan shut off.Thanks again for the help.
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post #5 of 8 (permalink) Old 01-31-2010, 12:36 PM
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Try www.supermiller.com look on the right side of the page and down to schematics (this link came from 359Kool just passing it along)
Great link 379Longhood. Do you know of a link to KW info???...
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post #6 of 8 (permalink) Old 01-31-2010, 10:44 PM
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Great link 379Longhood. Do you know of a link to KW info???...
Haven't seen any KW links, But I would guess that the electric system should be similar I always get KW parts from the pete dealers here. Sorry it took so long to reply I got caught up in the DRAWMA abt manifolds

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'88 379 exhd 3406C 15 40s 10 pete unimounts
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'62 gmc shortbox 454 super t10 big brakes
JD 820 black dash
12V92 waitin' for a truck (mega ratrod)
pettibone s20 3306 pc

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post #7 of 8 (permalink) Old 02-01-2010, 01:35 PM
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Try www.supermiller.com look on the right side of the page and down to schematics (this link came from 359Kool just passing it along)
Thank you to you and 359Kool. I found a few schematics that I've been wanting for a while. Now I only need the CAT repair manual with a wiring schematic for my MXS. Thanks again guys.

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post #8 of 8 (permalink) Old 02-14-2010, 03:56 AM
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nice ...... good find Thanks
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