Home-made OBD cables -- update - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-22-2007, 03:05 PM   #11
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Its uninstalled right now, but when i get it back together later this week, i sure will!

Back on topic.

I think hommeade cables are a great idea. Would you be able to put electronics in them so that the PRE OBD2 cars can have them read by various programs on the computer?
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Old 03-23-2007, 12:52 AM   #12
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Yes, I would certainly like to try that.

Here is an Australian website that points to such applications:

http://www.techedge.com.au/

Specific authors within show copyrights, so I will email one of them to get permission to reference him in our forums.


Easier of course would be if someone already had a circuit board of some sort they wanted to try, but I could certainly breadboard stuff if it isn't that complicated. I'll have to shake out my electronics junk boxes.

I need to do more thorough searching in our own forums to see if there'* other circuitry described (chime in members if you've posted stuff).
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Old 03-23-2007, 09:22 AM   #13
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If you could supply an inexpensive OBD II cable, I'd definitely be interested. Everything I can find right now is over 100 bucks, due to the wierd signal they use (I would assume it'* used to prevent ideas such as this)
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Old 03-23-2007, 11:14 AM   #14
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Hey guys! I was just reading another thread, where a new member, Jammie, found these inexpensive OBD2 cables online.

http://www.obd2allinone.com/sc/detai...item=obd2cable

Probably worth a look see for those needing one, IMO.
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Old 03-23-2007, 07:59 PM   #15
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Lash: That'* a great buy for 10 bucks. Jammie, you've got sharp eyes.

This cable is intended for GM '96 plus vehicles only. It is designed to plug into a code reader or a scanner. It'* wired so it would work world-wide for OBDII. You would want to get this if you bought a used OBDII code reader or scanner missing the cable or had the wrong cable. Or if you were building your own diagnostic system.

Here'* what it can't do:

You can't plug it directly into the serial port of your computer. OBDII does not have any RS232 serial communications protocols.

You can't use it on your 94/95 Bonneville or compatibles. This cord is not wired for the J1962 #9 data pin for OBDI protocol. It'* open, so you can't horse it around without doing major surgery. Physically it fits, but not electronically.

Oddly, this cable is cheap, yet the other cables from this site start at $40 and up. Still, this website offers alot of valuable information.

There is a sister websiite -- aldlcable.com -- that has alot of useful information about pre-OBDII protocols
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Old 03-23-2007, 08:55 PM   #16
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I would still rather rather keep it in the BC help out one of the guys here. so slug your cable should be able to plug into a computer with a serial port? what the time frame on makeing one of thses badboys?
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Old 03-24-2007, 02:33 PM   #17
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Hi Rogers!

I'm planning on ordering up some sockets and some cabling early next week.

I will be aiming at the 94/95 Bonneville/compatible vehicles first. (I've been thinking of this protocol as OBD94/95BC -- BC meaning Bonneville Compatible. Is this the same as OBD1.5? Anyone know?)

"93 and earlier vehicles can be done by the paper clip method.

"96 vehicles can usually be done at auto parts stores (except for certain parts of the US and Canada it'* harder to find them, I know).

So I'm going to start with the appropriate cables to fit the Actron 9110 and 9145 readers. Alot of these seem to have missing or nonfunctional cables. I don't have one of these instruments myself yet, but I'm looking hard in the usual places (eBay, etc.).

Then, once I feel more confident, I'll try direct cabling for OBD94/95BC from my '94 Bonneville to my PC computer, using low-cost or free software that'* avallable. I'll just be feeling my way along. As I get functional cables, I will make them available to BC members at cost.

I may be down for a day or two or three because I have to do a total computer wipe and Windows reload. So talk to you all later.
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Old 03-27-2007, 03:40 PM   #18
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Yep! I didn't think for a minute that these would fill the complete bill for what you are proposing Slug. Just offered the info up for those looking for inexpensive OBDII cables.

Heck at that price, they'd be good to get as backups or for a patch style cable, IMO.
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Old 03-27-2007, 09:49 PM   #19
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Exactly right, Lash! I'm planning on cutting up a few cheap cables myself. I'm getting kind of excited about this project. Keep the suggestions coming!

(Hey, I'm going to PM you sometime about your Ranger and suspension problems with mine)
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Old 04-04-2007, 02:54 PM   #20
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You can sign me up for one. Good project.
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