86 TPI diagnostic port under steering wheel - Third Generation F-Body Message Boards

1986iroc-z · 07-28-2009, 04:50 PM

Does anyone have a schematic for where the wires run to from the diagnostic port? I have a yellow organish color wire that is cut, it is coming from position E. I cannot find the schematic for this diagnostic connector at all, not even in the shop manual. I think it is the ALDL port? thanks

jv9999 · 07-28-2009, 10:38 PM

That's the serial data line. It also goes to M and connects to pin A8 of the ECM.

1986iroc-z · 07-29-2009, 10:44 AM

Got it on A8 to ECM. You say to M, I have many connections labeld M so please enlighten me a bit more please. I have made the connection over to A8 and waiting for more of your knowledge. Thanks for the help. Tony

jv9999 · 07-29-2009, 02:11 PM

Quote:

Originally Posted by 1986iroc-z

Got it on A8 to ECM. You say to M, I have many connections labeld M so please enlighten me a bit more please. I have made the connection over to A8 and waiting for more of your knowledge. Thanks for the help. Tony

The M port on the ALDL connector (lower right I think). So A8 on the ECM connects to both the E and the M contacts on the ALDL connector.