I am doing my obd conversion and would like to know once I am converted how do I check codes........searched but no luck

 

I would liek to know also

 

I kow alot of you have done this conversion how do you guys check the codes

 

there's a wire that comes out of the ecu clips (on stock cars) that has a plug you just jump, just like a timing adjustment connector.

basically you want to ground this wire to check codes. so just put a switch in there, one side to ground, the other side to this wire.

it's a blue wire on obd-1 cars, called the "data link connector"

 

pin c7 using the criss cross method.

 

so theres a 3 pin for data comunication, 2 pin for this CEL code, and a 2 pin for ajusting the timing?

 

On my conversion harnesses and on OBD1 setups, you can ground pin D4 and the check engine light will flash.

Jason

 

thanks everyone and blownhatch I am buying the harness from you so you pretty much you solved all my obd conversion questions

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">there's a wire that comes out of the ecu clips (on stock cars) that has a plug you just jump, just like a timing adjustment connector.

basically you want to ground this wire to check codes. so just put a switch in there, one side to ground, the other side to this wire.

it's a blue wire on obd-1 cars, called the "data link connector"</TD></TR></TABLE>

No it's not the "data link" pin you want.
That's ECU pin D7 on OBD-1 cars and it's light blue.
I have no idea what that wire does, but it's not for seeing your ECU fault codes.

D4 is the ECU pin you want to ground.
It's called Diagnostic and it's brown in color.... not blue.


Your OBD-0 ECU had a pin on it that ran out to a small connector under the glove box.
This is the connector you jump to set your timing.
On OBD-1 cars you jump the connector and it allows you to set your base timing AND it also lets the ECU know that it should kick out fault codes on the CEL.

They "should" all be wired for you to use the connector under your glove box.
I'm pretty sure most OBD-0 to OBD-1 jumper harnesses have wired it the same way because it wouldn't make much sense to do any other way.

Blownhatch's jumper harness might not use it from the impression I get from his responses to this post.
Why he wouldn't use the under dash connector... I don't know - the wiring is all there so ???!??!?!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">pin c7 using the criss cross method.</TD></TR></TABLE>

There is no Pin C7 on OBD-1.
OBD-1 has only A, B, and D connectors.