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Truck Mechanics need help #6314795
08/31/18 04:50 PM
08/31/18 04:50 PM
Joined: Feb 2009
Posts: 841
Pennsylvania!
trapper4 Offline OP
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Pennsylvania!
What is the name of this canister that an electrical plug is plugged into? Having a no crank issue with 07 Silverado, this canister is making a sound each time we try to start the truck.

Thanks a bundle!!


The 2nd Amendment is my concealed carry permit!
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Re: Truck Mechanics need help [Re: trapper4] #6314917
08/31/18 08:21 PM
08/31/18 08:21 PM
Joined: Jan 2016
Posts: 411
New Hampshire
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Terrence j Offline
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Terrence j  Offline
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New Hampshire
That's the 4x4 actuator. It is probably until locking when you turn the key on.

Re: Truck Mechanics need help [Re: trapper4] #6314930
08/31/18 08:48 PM
08/31/18 08:48 PM
Joined: Jan 2007
Posts: 2,136
B61-12 vicinity, MO
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TreedaBlackdog Offline
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B61-12 vicinity, MO
anything out of the starter? does it crank?

Re: Truck Mechanics need help [Re: TreedaBlackdog] #6314933
08/31/18 08:53 PM
08/31/18 08:53 PM
Joined: Feb 2009
Posts: 841
Pennsylvania!
trapper4 Offline OP
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Pennsylvania!
Ok. Yes Treedablackdog, I just replaced starter. I can get starter turn crank from relay by jumping with a jump wire. I think the problem is somewhere between the ignition switch (which is new) and the starter relay. I have power at the starter relay from battery, but no power any where else at the starter relay when we turn the key on.


The 2nd Amendment is my concealed carry permit!
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Re: Truck Mechanics need help [Re: trapper4] #6314954
08/31/18 09:17 PM
08/31/18 09:17 PM
Joined: Apr 2015
Posts: 175
northern wi
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w8n4rut Offline
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northern wi
Does it start in neutral?


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Re: Truck Mechanics need help [Re: w8n4rut] #6314973
08/31/18 09:48 PM
08/31/18 09:48 PM
Joined: Feb 2009
Posts: 841
Pennsylvania!
trapper4 Offline OP
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Pennsylvania!
No. will not crank- any help would be appreciated. Thanks guys.


The 2nd Amendment is my concealed carry permit!
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Re: Truck Mechanics need help [Re: trapper4] #6314977
08/31/18 10:02 PM
08/31/18 10:02 PM
Joined: Jul 2016
Posts: 5,516
South Carolina
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Tom cat Offline
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South Carolina
Just a shot in the dark here, is it possible that the shifter safety switch is bad??


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Re: Truck Mechanics need help [Re: trapper4] #6315010
08/31/18 10:49 PM
08/31/18 10:49 PM
Joined: Jan 2014
Posts: 2,081
NW MO
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TurkeyTime Offline
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TurkeyTime  Offline
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Posts: 2,081
NW MO
Can you get ahold of/buy a cheap code reader?

Re: Truck Mechanics need help [Re: trapper4] #6315111
09/01/18 05:59 AM
09/01/18 05:59 AM
Joined: Dec 2009
Posts: 54
se iowa
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plumber Offline
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se iowa
Replaced starter what about solenoid that you are jumping.

Re: Truck Mechanics need help [Re: trapper4] #6315115
09/01/18 06:09 AM
09/01/18 06:09 AM
Joined: Jan 2016
Posts: 411
New Hampshire
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Terrence j Offline
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New Hampshire
Ok so you are actually jumping the relay under the hood in the relay and fuse box ? It sounds like if you are jumping the starter solinoid you could have a bad fuse or even a bad wire. I ha e seen the wires that all go to the starter carode pretty bad up here but that's cause we use a lot of salt in the winter. So I would check the wiring and make sure it's all good

Re: Truck Mechanics need help [Re: trapper4] #6315117
09/01/18 06:19 AM
09/01/18 06:19 AM
Joined: Dec 2006
Posts: 29,750
williamsburg ks
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danny clifton Offline
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williamsburg ks
I don't have a clue why ignitions have to be so complicated. clutch safety switch, neutral safety switch, anti theft proper key cut off, low voltage relay, and who knows what all anymore. a solenoid between the starter and the switch, hot wire to A coil worked just fine. didn't need to be a rocket scientist to diagnose whatever the problem was. a tach/ohm meter, a test light, compression tester and vacuum gauge were enough to diagnose any problem on any vehicle.

anymore I take most problems to a shop


Those who would give up essential liberty, to purchase a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin (1706-1790)
Re: Truck Mechanics need help [Re: trapper4] #6315131
09/01/18 06:57 AM
09/01/18 06:57 AM
Joined: Jun 2018
Posts: 4,739
Beatrice, NE
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loosegoose Offline
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Beatrice, NE
There is a pink wire that comes off the ignition switch, should have 12V with the key in the start position. Pink wire goes to the body control module, connector X1 pin 2. ( I know the connector and pin numbers probably won't help you, but you may be able to look them up). BCM talks to the PCM over a network and tells it that the key is in the start position. PCM sends 12V on a yellow/black wire, connector X1 pin 71, to pin 86 of the starter relay in the underhood fuse black. The starter relay coil is grounded (pin 85) at the engine. The switch side of the starter relay should have power with the key on at pin 35. Pin 87 should have power with the relay switched on. Then power passes through a 40A STRTR fuse in the underhood fuse block to a purple wire that goes to the starter. So your diag should be this: You said you have power at the relay in only one of the four terminals, correct? You should have power with the key on at pin 30 all the time (These numbers 30, 85, 87, 86, are marked on the relay. Look at it and that'll tell you which terminals to check) You should have power at terminal 86 when you turn the key on. If you don't, you aren't getting a start signal from the PCM. From there you'll have to check at the PCM for 12V on the yellow/black wire. If you have 12V there but not at the relay there is a broken wire between the PCM and fuse block. IF you don't have 12V at the PCM, check for 12V at the ignition switch on the pink wire w/ key in start position, if you have 12V there, check at the BCM for 12V. That should be a good start, I can give more info from there if you need it.

Re: Truck Mechanics need help [Re: trapper4] #6315138
09/01/18 07:22 AM
09/01/18 07:22 AM
Joined: Dec 2006
Posts: 29,750
williamsburg ks
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danny clifton Offline
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loosegoose Beatrice aint that far from me. whats the name of your shop for next time I got trouble?


Those who would give up essential liberty, to purchase a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin (1706-1790)
Re: Truck Mechanics need help [Re: trapper4] #6315151
09/01/18 07:44 AM
09/01/18 07:44 AM
Joined: Jun 2018
Posts: 4,739
Beatrice, NE
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loosegoose Offline
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I work for a police department so you might have a hard time getting your vehicle in grin But I can on occasion be convinced to do a side job here and there, but I'm limited since the shop provides all tools. I still have most of my tools from my dealership/private shop days, but sold all the bigger stuff.

Re: Truck Mechanics need help [Re: trapper4] #6315152
09/01/18 07:46 AM
09/01/18 07:46 AM
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Beatrice, NE
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loosegoose Offline
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trapper4 one other thought: is your security light on or flashing with the key in the start position? If so it's off to the dealer because it'll require a scan tool to diag and fix.

Re: Truck Mechanics need help [Re: loosegoose] #6315242
09/01/18 10:46 AM
09/01/18 10:46 AM
Joined: Feb 2009
Posts: 841
Pennsylvania!
trapper4 Offline OP
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Thanks a bunch guys, I am heading out to check all the information. I will check back in soon.


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Re: Truck Mechanics need help [Re: danny clifton] #6315271
09/01/18 11:33 AM
09/01/18 11:33 AM
Joined: Mar 2015
Posts: 615
Alabama
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Coonman300 Offline
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Alabama
[quote=danny clifton]I don't have a clue why ignitions have to be so complicated. clutch safety switch, neutral safety switch, anti theft proper key cut off, low voltage relay, and who knows


So the ordinary guy can't work on it


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Re: Truck Mechanics need help [Re: trapper4] #6315367
09/01/18 03:20 PM
09/01/18 03:20 PM
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Posts: 20,966
St. Louis Co, Mo
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BigBob Offline
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That's what happens when you bring lawyers into the engineering office.


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Re: Truck Mechanics need help [Re: trapper4] #6315379
09/01/18 03:48 PM
09/01/18 03:48 PM
Joined: Jun 2018
Posts: 4,739
Beatrice, NE
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loosegoose Offline
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Beatrice, NE
New vehicles are more complicated because of the equipment in them. Using the example of the ignition switch, in the old days, the ignition switch would power up your ignition coil and everything else that had key on power. maybe 30a worth of stuff. Now these days, when you want to use your remote start to shut off your alarm and anti-theft system, start your vehicle from the comfort of your living room, and crank up your eight speaker stereo system, with the heated seats, mirrors, and rearview defroster going, that just isn't going to happen through a regular switch, not without running some massive 8 gauge wires to an ignition switch, It's much easier for the manufacturers to have a ignition switch control a small amount of current and use modules to communicate and control various functions. Networking is another big difference between old and new vehicles. Networking is how different modules can communicate information with eachother. Think of your vehicle speed sensor-the pcm uses it for all kinds of things. The ABS module uses it. The radio uses it for automatic volume adjustment. The body control module might use it to control an electronic parking brake. If there was no network, the speed sensor would have to run to each one of those modules individually. With networking, the PCM receives the signal, and can share it with all the other modules on the network. New vehicles really are better than old vehicles in most every way. They're faster, more fuel efficient, stop better, handle better, are more comfortable, last longer, and have way more creature comforts than cars from "the good old days". The only way old cars beat new cars is in style and class.

Last edited by loosegoose; 09/01/18 03:49 PM.
Re: Truck Mechanics need help [Re: loosegoose] #6315382
09/01/18 03:51 PM
09/01/18 03:51 PM
Joined: Oct 2015
Posts: 606
Southaest Kansas
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Coyote Clayton Offline
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Southaest Kansas
Originally Posted By: loosegoose
trapper4 one other thought: is your security light on or flashing with the key in the start position? If so it's off to the dealer because it'll require a scan tool to diag and fix.


My thought. Security lock out or fuse in the side dash.



Compulsive Coyote Washer
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