Just curious as to what signals positive or negative signals does the following pins put out.

A13, and D4

 

A13 = malfunction indication lamp output which outputs a ground for the check engine light

D4 = Service check signal which doesn't output anything if I remember correctly. Simply ground d4 to check malfunction indication codes.

 

^^^ right to the point!

 

Ok, good to hear. thxs

 

If it revs up past 3500 you don't have a code 0. Likely wiring or your MIL bulb is burnt out. You can hook up an LED to the MIL output as a test as well.

 

ok, here is the deal. Strange thing happening. I can rev over 3500

I cant get my CEL light on. No matter what I do. According to what you posted above A13 is a Negative signal, and its connected to a lightbulb and the other side of the bulb is connected to a positive signal wire, ign1.

Now here is the deal. If I leave A13 disconnected from a (tested) bulb its outputting a negative 12volt signal. Now (strange part) when I connect a bulb to itjust like explained above, the signal goes away.

I tested with a multimeter. With the bulb disconnected its giving out a proper signal. With the bulb connected it omits nothing. No negative or positive signal. But the minute you disconnect the bulb, the negative signal comes right back.

So I guess it would be the equivlent of starting the car with no cel, and when you jump it no cel.

 

It's possible the circuitry for the CE light is damaged. To be sure, test your ECU in another car or another ECU in yours. If the ECU needs to be repaired, I can help ;-)

 

Nice I followed chapter 14 versus 36 from the might helms.

I followed the chart down to where I run into the A8 pin. I checked the voltage between A25 and A8 with the ign on. And there was voltage. According to helms there shouldnt be any. So I found the wire that the A7/8 pins were connected to and cut the wire supplying the voltage. Now I find out that there is no voltage to the A7/A8 pins. Good, but now the car dont start.... Haha

Im going to go crack open the ecu than Im pulling the harness out the car. I guess I should be looking for burn marks on the ecu itself.

 

Well found a blown out something inside the ecu. I guess I can assume that this might be part of the cause.