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Username Post: Detailed circuit diagrams        (Topic#344924)
Lorence 
Forum Newbie
Posts: 8

Reg: 05-23-17
05-23-17 09:08 PM - Post#2692575    

I recently downloaded a huge wiring diagram for a 2013 Silverado 2500HD titled Electrical Manual – 2013 Light Duty Full Size C/K Trucks. It can be downloaded at the following link.

https://www.gmupfitter.com/publicat/2013_BB/2013 _L...

The diagram does not get down to the individual connector level. It refers to what appears to be many individual circuit drawings that might.

I have a problem with the power mirrors on my truck. Initially I thought it would be a simple switch replacement fix, but now I am not sure.

The information I have found in my drawings leads me to believe the problem may be down a bit deeper in the system.

I would like to see a wiring diagram of the Drivers Door Power Mirror switch connector to prove the trouble is in the switch or may be elsewhere.

Drawings I have showing Power Mirror Circuitry refer to a Circuit No. 330 in lists of wiring harness connector pin assignments. These circuit numbers range up into the thousands but no mention of how to find individual circuits like the Circuit No. 330 I am looking for, or any other.

Anyone here know about these individual circuit numbers and if they are available?

Lorence









 




paulo57509 
Senior Member
Posts: 380

Loc: Tracy, CA
Reg: 07-18-00
06-09-17 04:20 PM - Post#2695262    
    In response to Lorence

I see your dilemma.

The only references to Circuit 330 an Acrobat search could find are Pages C-9, C-14 and C-15. These are just the connectors/plugs for left front door harness to body harness. I coudn't find any reference of where or how Circuit 330 is or runs.

One of the connectors referenced in the above pages is at the mirror motor; you might want to access this connector and probe the proper pin for 12v before condemning the switch.

It's not so simple to read the manual anymore since everyone is going to modules to control body, engine and transmission functions.

Edit: You might try Pages D-60 and D-61.

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari


Edited by paulo57509 on 06-09-17 04:30 PM. Reason for edit: No reason given.

 
Lorence 
Forum Newbie
Posts: 8

Reg: 05-23-17
06-09-17 05:22 PM - Post#2695268    
    In response to paulo57509

Thanks for the reply.

To my eyes the drawing D-60 refers to a connector J7, pins ranging from 1 to 10 and another connector J3, pins ranging from 1 to 6.

The pin positions on my mirror control switch are labeled A to J. Ten positions (excluding the letter "I").

I found + 12V on pin D (#4) of the switch. The drawing D-60 puts power on what I believe to be pin 7 of J7. No doubt these drawings refer to a connector but not the switch connector.

I think this drawing refers to the body wiring harness connectors a little closer to the main distribution blocks than the actual device end connector.

I gave up in finding a drawing and took the old switch apart. There was a burnt out component on the board that made quite a mess of the rest of the circuitry. I ordered a new switch and that solved the problem.

I felt an answer to my original question would be valuable to a lot of people with wiring issues so I left the question up in the hope someone would have an answer.

For what it is worth I was able to get a few schematic wiring diagrams for my wife's Toyota. They got right down to the individual connector pins and wire colors on each pin. I'm sure most would love to get their hand on GM drawing of that detail.

Someone has them. AC Delco will sign you up for a fee ($100.00 + for three days access to their system )and give you all the info you want. GM will sell a full Factory set for $1000 +. Not bad for changing a $40 switch.







 
paulo57509 
Senior Member
Posts: 380

Loc: Tracy, CA
Reg: 07-18-00
06-11-17 05:49 PM - Post#2695544    
    In response to Lorence

About the link in your first post; is that part of the actual GM manual?

Also, whenever I see "upfitter", I think third party assembler. Like what Winnebago or someone like that would use when they purchase a bare, running chassis and fit their own RV or utility body to it.

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari


 
Lorence 
Forum Newbie
Posts: 8

Reg: 05-23-17
06-11-17 07:42 PM - Post#2695571    
    In response to paulo57509

Google found the Wiring diagram. I just clicked the posted link, the PC did all the rest. A few of the diagram pages have the words "GM Proprietary" on them so I assume they originated at GM but I can only guess what their actual purpose is.

A visit to the gmupfitter site at https://www.gmupfitter.com suggests you are right about being information for third party alliances with GM.

On it's own that diagram would be useful to many. It's worth downloading just for a look at all the general information it does have. Too bad they didn't take it down to the device connector level.

Lorence




 
65_Impala 
Very Senior Member
Posts: 3928

Reg: 12-29-02
06-13-17 06:21 PM - Post#2695852    
    In response to Lorence

The factory service manuals I've looked at had all the connector pin-outs.



 




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