12 pin GM diagnostic coonnector

Bill Gerrie · June 21, 2018, 06:20:20 AM

Does anyone have a couple of the GM 12 pin diagnostic connectors they would sell me? They were used in the pre 95 GM vans etc. They are a rectangular part with 12 pins (not all used) with screw holes at each end. Any help finding thee would be appreciated. I tried to upload a picture but I guess it was too big.

luvrbus · June 21, 2018, 06:38:21 AM

Bill are you looking for the OBD1 connector ?

chessie4905 · June 21, 2018, 06:44:41 AM

I don't know where you live, but you should easily obtain some from a salvage yard. A pic and pay would be best.

chessie4905 · June 21, 2018, 06:47:57 AM

I don't know where you live, but you should easily obtain some from a salvage yard. A pic and pay would be best. If that won't work, I could send you one or two.

Iceni John · June 21, 2018, 07:30:29 AM

Zachers Bus Salvage in Harbor City was recently dismantling some Crown Super IIs (the same as my bus) before sending their carcasses to the scrapper, and they all have those 12-pin under-dash connectors under the bottom of the front gauge panels. I was thinking about getting one from there: I want to make an adapter cable so I can test my spare DDEC II computer, with a 12-pin connector at one end and a DDEC 30-pin VIH plug at the other. If/when I'm next there I'll look for you - I also want to get some other odds and sods such as a spare Williams electronic accelerator pedal and maybe a spare gauge panel.

John

chessie4905 · June 21, 2018, 08:09:55 AM

Easy to get off a gm car. Two 7 mm screws to remove and side cutters is all you need.

Bill Gerrie · June 21, 2018, 05:45:35 PM

Thanks for the help guys. I phoned every wrecker in the area yesterday and nobody had any 90 to 94 GM cars or trucks. I finally found a yard today and drive 1 1/2 hours to it and got what I needed. I never knew they were so scarce. I should never have given the one i had away.

brmax · June 21, 2018, 06:44:44 PM

If others are looking for an early ALDL connector, heres an option for the future.

https://www.ebay.com/p/GM-OBD-1-DLC-Kit-With-Terminals-Panel-Mount-ALDL-Diagnostic-Connector-TBI-TPI/1941728585

Good day

Floyd

Bill Gerrie · June 22, 2018, 05:42:43 AM

I must have typed in the wrong info because nothing came up in a Yahoo search. That is exactly what I was searching for and I wouldn't have had to spend all day on the computer and phone trying to find one. I also wouldn't have had to drive 3 hours to remove one at the wrecking yard.

brmax · June 22, 2018, 06:06:03 AM

Hey Bill, only because its Friday and we can all laugh these situations off. I have did the same thing, and on the very same terminal. Not to mention a few wrong answers on Ase test questions on the darn name. ALDL, assembly line diagnostic link, or data link whatever.
I thought the ole diagnostic place on the net had them long ago, but no more.

Anyway have a good day, its Friday

Floyd

Bill Gerrie · June 22, 2018, 10:37:31 AM

I typed in every name I could think of for the connector but never heard it called an ALDL. You learn something every day. Yes it is Friday and time to relax and have fun.

chessie4905 · June 22, 2018, 11:20:02 AM

Part of OBD2 requirements was that all manufacturers were required to use the same term for every component of the system. Before that, GM, Ford, and Chrysler used different terms for each causing confusion for techs and parts suppliers or stores. On 1984 Cadillacs, you could read the diagnostic codes right on radio screen by pushing the correct buttons.