Diagnostics Cable Adapter

[Nuckollsr]

I'm looking for an adapter cable to plug my modern OBDII code reader into the data port of my 1987 GMC R1500. I've ordered two cables that were supposed to mate with the truck but their connectors were incompatible. Any suggestions? Thanks!

 

[Rusty Nail]

I suggest you may have better luck in a website whose trucks have that connection in them.
Nobody here has that. Wtf u ask us for?

*rhetorical

I fix mine with a paperclip and a #2 phillips

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[Ricko1966]

I'm looking for an adapter cable to plug my modern OBDII code reader into the data port of my 1987 GMC R1500. I've ordered two cables that were supposed to mate with the truck but their connectors were incompatible. Any suggestions? Thanks!

Gm used their own language back then. Your Obd2 scanner isn't going to be able to communicate ,even if you get a cable. Those old GM aldl connectors you short terminal a to terminal b and its flash diagnostics. 1 long check engine light flash 2 quick ones is code 12. So on and so forth. If you use a paperclip make sure it's a real deal old metal paperclip with no coating. Yes I was fooled by a plain looking silver paperclip that had some stupid coating on it once.

 

[TotalyHucked]

As stated, that's not possible. Your truck longgggg predates OB2, you'll have to use the paper clip method posted above

 

[fast 99]

Will flash 12 three times then current codes starting with smallest numbered ones first. Each code will flash three times then will move to next code three times if more than one. Back to 12 again when all codes have been flashed. Do not disconnect power until all codes have been read.

Usually the diagnostic procedure begins with lowest numbered code first. Occasionally, one failure will cause several codes. Keep in mind OBD1 systems are not very smart. They do not read misfires, evap and many other failures.

 

[gmbellew]

ALDLDroid on an android device and a Bluetooth ALDL cable from 1320 electronics is what I use to have nearly all the capability of a scan tool. you can monitor almost everything the computer sees. I don't see 1320 website working. red devil river also makes one, but you will have to use their power jumper.

 

[RetroC10Sport]

OBD Diagnostics, Inc. - OBD2 All-In-One Scan Tool w/ USB

The OBD2allinone pc scan tool to turn off the check engine light on OBD2 cars and trucks is made and sold by OBD Diagnostics Inc. Our automotive diagnostic tools can read and log any obd check engine code data.

obd2allinone.com

This is what i have and using a laptop.

 

[Nuckollsr]

I was not expecting the '87 to communicate in OBDII . . . agreed that it's a modern, more universal protocol. The reader I have was advertised to read legacy protocols . . . it does a scan for a variety of protocols during boot-up. But they didn't offer interface adapters. I've tried several adapters that claim to plug a modern OBDII cable into the older, target vehicle but the vehicle-side connector failed to mate with my truck. Not a big deal . . . yeah, the paper-clip hack works. Just disappointed that claims by the code reader have been impossible to realize. Life trudges on!

RetroC10Sport: Thanks for the tip on obd2allinone.com . . . . I'll check 'em out!

 

[RetroC10Sport]

RetroC10Sport: Thanks for the tip on obd2allinone.com . . . . I'll check 'em out!

I paid $15 for my cable used off ebay but that's where it is from. You can probably use winaldl for the program. That's what I used for my old TBI engines as I recall.