gexgexgexgex Posted September 24, 2006 Share Posted September 24, 2006 I just got a 1994 caprice lt1 with tranny and wiring harness for my 240z. I was looking thrugh the wiring harness and did not find a OBDI Connector. So that means i need to make one then. What i want to do is to tune the car using tunner cat. My question is what ecm wires do i use to make the OBDI Connector, also should i even make the OBDI Connector or should i do something else? I plan one useing one of the cables from AKM but what one should i use? I did search by the way but if for some reason i missed it i am very sorry. Any help would be great. Quote Link to comment Share on other sites More sharing options...
gexgexgexgex Posted September 25, 2006 Author Share Posted September 25, 2006 ok i just found this site and i tink i just answered one of my two questions. http://www.lencolab.com/ss/diagrams/impala_9495engine_3of3.pdf the OBD connetor only really needs 3 wires connected to it, serial data, ground, and output/field serv enbl. Just want to double check that im right. Also my other question, what cable should i buy from AKM? Quote Link to comment Share on other sites More sharing options...
Bartman Posted September 25, 2006 Share Posted September 25, 2006 I got this cable from ALDLCable.com and it seems to be working fine. http://www.aldlcable.com/sc/details.asp?item=aldlobd1 I wound up buying the full Factory Service Manual for my car, but you can find alot of information online. Here's a link to a site that has alot of information regarding f-body LT1 which may have some good information for you as well. http://shbox.com/1/schematics_wiring.html Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted September 27, 2006 Share Posted September 27, 2006 I to got my cable from ALDLCable.com and like you I did not get the ALDL OBDI diagnostic port that is located under the dash of most cars. I emailed Andrew (andrew@akmcables.com) and he made me a diagnostic port. In my case it is a D-shaped 16 pin port and he attached either 3 or 4 long (3ft) wires so I could reach my ECM. In your case, the 94 was most likely a 12 pin rectangle port. In either case he has the empty connectors and can set you up. I believe he charged me only $10 for my DP but I also bought his ALDL Cable w/OBD2, USB Version cable as I have a 95LT1 engine. Not to confuse you even more but in my case the 95LT1 is an ODB1 engine that uses the ODB2 style 16 pin connector. As an alternative you can go to wreaking yard and see if you can pull out a GM ODB DP as most are all the same. Danno74Z Quote Link to comment Share on other sites More sharing options...
gexgexgexgex Posted September 27, 2006 Author Share Posted September 27, 2006 well i order the 12 pin connector that has the built in 12 power like Bartmans and i emailed the guys at tunner cat and they told me i only have to hook up 2 wires, seril data and a ground, so now i do not even need a female connter for it i can just add to wires. also the guys at tuner cat are great with emails, if anyone is having problems jsut email them. Quote Link to comment Share on other sites More sharing options...
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