require wiring schematic of 95 obd I to obd II connectors - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

require wiring schematic of 95 obd I to obd II connectors

Closed Thread

 
 
 
Old 06-11-2007, 04:22 PM
  #1  
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default require wiring schematic of 95 obd I to obd II connectors

Well.. I was staring at my parts car and a thought popped into my head..

I have a spare OBD II connector ( in the parts car )..
and wondering if anyone has the wiring schmetics of OBD I and OBD II connectors.

I"m thinkin since 95 is a retarded year of OBD I connector on OBD II PCM.. maybe IF I can rewire and put the OBD II connector in place of the OBD I connector on Tamara'* 95. I would be able to read and scan it like a normal OBD II with my scan tool.

Any inputs? ( I think it was asked a while ago..but too lazy to search thru countless of threads and diggin up old threads )
Drifter420 is offline  
Old 06-11-2007, 06:04 PM
  #2  
Senior Member
Posts like a Turbo
 
Join Date: Oct 2006
Location: Twin Lake, MI
Posts: 221
Thanks: 0
Thanked 0 Times in 0 Posts
Slug is on a distinguished road
Default

You will only be able to do this if your scanner has both OBDI and OBDII capability (for example the Actron CP9145). To the best of my knowledge, you can't read OBDI cars with an OBDII-only scanner. The protocols are entirely different. The weird "OBD1.5" used in '94 and '95 Bonnevilles is really OBDI protocol, but uses OBDII codes and the 16-pin J1962 socket (with different wiring from the OBDII).

With that said, Bill Buttermore has posted the schematic for wiring the 16-pin OBD1.5 socket. But you still would have to know how to wire it to your scanner. That'* the rub.
The manufacturers don't seem to publish that kind of information :( . So far, Bill'* schematic wires only to the Actron OBDI CP9110 scanner (although there was some discussion once that it might work in the CP9145 scanner as well, I don't know).

If you have a dual capability scanner, chances are you will have to check with the manufacturer for a different cable.

(ps -- note that I have corrected my first paragraph to add the part about "OBD1.5")
Slug is offline  
Old 06-18-2007, 12:55 AM
  #3  
Senior Member
Posts like a Corvette
 
Join Date: Jan 2003
Posts: 1,250
Thanks: 0
Thanked 0 Times in 0 Posts
bmsgaffer86 is on a distinguished road
Default

If you are at all into electronics you can build a circuit and read the problems with a laptop.

A level converter that involves one chip and some soldering converts the cars output to straight serial data which can be read by a free-to-try software program known as EFILive v4.
bmsgaffer86 is offline  
Old 06-18-2007, 09:40 AM
  #4  
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Actually..your 95 is a retarded OBD2 connector
BillBoost37 is offline  
Old 06-18-2007, 06:19 PM
  #5  
Senior Member
Posts like a Turbo
 
Join Date: Oct 2006
Location: Twin Lake, MI
Posts: 221
Thanks: 0
Thanked 0 Times in 0 Posts
Slug is on a distinguished road
Default

Originally Posted by BillBoost37
Actually..your 95 is a retarded OBD2 connector
Thanks, Boosty, THAT'* what I was trying to say !



Originally Posted by bmsgaffer86
If you are at all into electronics you can build a circuit and read the problems with a laptop.
Right! A few years ago, one of our members had this interesting, extensive thread on it:
http://www.bonnevilleclub.com/forum/...erface&start=0


The author ("enmityst") doesn't seem to be active lately, but other repliers are. (and I'll be PMing all)

(my own project on this direct connection is slowed due to remodeling of my work area, but I should be able to put something together soon for the "retarded OBDII" sysytem)
Slug is offline  
Old 12-30-2017, 08:03 PM
  #6  
Junior Member
Posts like a Ricer Type-R
 
Join Date: Dec 2017
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Baberuth2021 is on a distinguished road
Default

Originally Posted by Drifter420 View Post
Well.. I was staring at my parts car and a thought popped into my head..

I have a spare OBD II connector ( in the parts car )..
and wondering if anyone has the wiring schmetics of OBD I and OBD II connectors.

I"m thinkin since 95 is a retarded year of OBD I connector on OBD II PCM.. maybe IF I can rewire and put the OBD II connector in place of the OBD I connector on Tamara'* 95. I would be able to read and scan it like a normal OBD II with my scan tool.

Any inputs? ( I think it was asked a while ago..but too lazy to search thru countless of threads and diggin up old threads )
I found a male to female or vise versa for that obd1 connector it has the obd1 connector on one end that plugs in to the obd1 connector on car and the other end is the 16 pin obd2 that hooks up to a scanner
Baberuth2021 is offline  
Old 12-30-2017, 10:25 PM
  #7  
Senior Member


True Car Nut
 
Soft Ride's Avatar
 
Join Date: Jan 2012
Location: BC Canada
Posts: 3,925
Thanked 399 Times in 352 Posts
Soft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud of
Default

Baberuth2021 Please do not bump old threads.
If a thread/post is more than say 6 months old, we would prefer that you not reply to that thread, but instead make an "new thread" with a link pointing to the old one.
Most of the time, the OP'* haven't been on in years and more than likely they won't respond. This is also called Necro bumping.
See Site rules & policy. https://www.gmforum.com/introduction...2015-a-304557/
Thread Closed.
Soft Ride is offline  
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bigerik
Everything Electrical & Electronic
6
07-26-2006 09:19 PM
Drifter420
Everything Electrical & Electronic
20
06-29-2006 04:08 PM
Aphix
Audio (and aftermarket electronics)
1
11-25-2005 05:48 PM
Lilchief
Everything Electrical & Electronic
2
11-11-2004 06:24 PM
mnymn3
Everything Electrical & Electronic
8
03-13-2004 03:19 PM


Thread Tools
Search this Thread
Quick Reply: require wiring schematic of 95 obd I to obd II connectors


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.