I have had an 84 Corvette and the service manual lists steps to check something out if you set a code. The service manual for my 2002 tells me to connect my scan tool and----------. Well, I don't have a scan tool except for my AutoXRay EZ Scan 6000 which gives me pretty good engine info, but has no info on body Control modules, or Door Control Modules or Brake Control modules. Everything I need to work on to make my C5 operate like it should needs a separate scan tool to troubleshoot? Or am I wrong?!!! I'm not having much luck with electrical issues in this C5 Nightmare World. How are you guys doing this? Is there a chance a regular home mechanic could afford the equipment needed? Is there some sharing of methods going on? I'm LOOOOSSSSTTTTTT. Help!!

 

http://www.stengel.net/diccodes.htm

 

[QUOTE=lsherman;1567702629]I have had an 84 Corvette and the service manual lists steps to check something out if you set a code. The service manual for my 2002 tells me to connect my scan tool and----------.

Seems like a lot of things in the C5 service manuals assume your at a dealership or an electrical engineer. Post the DIC codes and sometimes there is an easier way.

 

Good lord....settle down. I guess it really depends on the competency of the "home mechanic", and the ability of one to understand what is in the service manual as it pertains to troubleshooting( and being able to decipher what equipment is needed, and what is not).

Honestly, I don't find anything do be a nightmare on a C5. The service manual is well written, and everything is pretty straightforward.

If you have a specific problem or codes, then post them, and plenty of guys on here can help you out. If you feel overwhelmed by wiring and understanding the service manual, then perhaps a local forum member can assist you .

In any case, be specific and post codes to receive specific help.

 

Please tell us what you are having problems with and as already said, post your codes. If you plan on keeping your car "forever", you'll need to look to purchase a scan tool or find someone who has one, but they cost like $3500 to buy outright. Be happy the C-5's have codes you can get too in the DIC, the C-6's do not.

 

OK, I'm calmed down. I'm really not overwhelmed by the electrical part of troubleshooting. I've been an electrician all my adult life, but I guess i
I can't believe how complicated the service manual makes this stuff. Let me confess my jaded history with this car and see if someone can help. My DICs are all history and mostly concern failure to communicate between control modules and instrument panel to BCM.
My actual problem is that my driver door lock, window and mirror operations don't work. Memory function is ok, and I can adjust the pass. ext. mirror from driver side controls. I cannot operate pass. door window or lock from driver side. Driver mirror does not work. I have sent the driver door module for repair(ebay repairman) and it was returned as OK. I have been told to check the connector in the accordian pleated boot between the door and the door post. I know you all believe it to be there, but there is no connector in that rubber boot. There are connectors in the door panel area for everything but not the connector in the boot (C201) that supposedly has the short wire that pulls loose and will solve everything if I reset it.
That's what i KNOW. What I don't know would fill a book. Thank you everyone for the offers of help. I've been beset by this problem for months. By the way, I raised my window by supplying power to the pin in the connector that goes to the window motor from the Door Control Module. There is much more but this is the basics. Sure hope you can help. Larry

 

Hi again. Sure hope you can help here. Just pulled these codes from DIC: LDCM-2202H, 2204H, 2206H, 2208H, 2286H, 2284H, 2272H,1064H. RDCM 1064H. Need to take some continuity readings. What would you suggest testing. Thanks

 

I think you have everything you need...codes, a strong electrical background, but you need a C5 service manual to properly troubleshoot. The wiring to the doors needs physical inspection. There is a troubleshooting procedure for every code you listed in the service manual. Take your time, be patient, and you will find the problem.

 

And whatever you do, do NOT use a standard test-light sized probe or a standard sized probe on a DVOM to insert into the connectors to check for continuity/power, etc. They are too large and will most likely deform/bend the pins inside, especially the females. When you plug that connector back in or together, you will have likely created either: a. open circuit, or b. a poor connection, along with it's usual high resistance, etc.

No need to go out and buy any exotic test equipment or special probes. I "poor boy" it by using a small paper clip to insert into the connector, and then use alligator clips for my connections to the paper clip. Notice I said "small" paper clip.

HTH

 

"I have been told to check the connector in the accordian pleated boot between the door and the door post. I know you all believe it to be there, but there is no connector in that rubber boot."


It's just inside the "B" pillar, and can easily be pulled out with the pleated boot pulled loose.

 

Let me be the FIRST to tell you that I was C5 STUPID when I purchased my 98. I joined the forum way back in 99 and asked LOTs of questions and learned a LOT. After the warranty went away, my 98 became the C5 from HELL! It was an electrical basket case!

I purchased the service manuals and mastered them. The rest is history. Once you master pulling DTCs and finding that DTC in the manual, its petty easy to figure out what the issue is. The Digital Volt meter is your FRIEND! Learn how to use it and

As Lucky stated, you have the electrical theory background. All you need is service manuals and then get familiar with them. Always ask the Forum for help before you go to the STEALERSHIP or give up! There are very few things that we have not seen or fixed.

Those door wiring harness electrical connectors are in the B pillar!!! Pop out the accordion tube on BOTH ends and find the wires. Pull the wires OUT of the door pillar hole and the connectors will pull out. There will be TWO of them. I recommend separating the connectors, checking them clean if necessary and insulate any bare wires.





BC

 

Ahhh, the mythical "non-existent" connectors. I was kinda wondering when you would jump in here Bill.

I could not agree more on getting shop manuals and becoming familiar with it. It has a wealth of information, not the least of which is in the wiring department.

 

Wow!! You guys are GREAT. Never heard about the connectors maybe being in the B Pillar. New place to work today. How have you guys gone about cleaning the connectors. Contact cleaner? I am so amazed by the knowledge of the people on this board. I do have the service manual and have studied it enough to have a pretty good understanding of how things work. To bad they don't have a diagram of the inside of the DCM. I think my problems are wiring related as opposed to DCM problems though. I'll post what I learn. Thanks again. Larry

 

There have been some posts where people have disassembled the DCM's and replaced defective relays and repaired traces. Not difficult. Just a little time consuming.

 

Replace relays. I think I could do that. Does anyone know where they get relays. I would be surprised to find a local source where I live. Anyone have sources? Thanks once more. You guys are the best!! Larry

 

http://parts.digikey.com/