I've got an 89 Accord that's got a problem. Have checked most everything and have replaced all vacuum lines. I would like to test the ECU outputs but the Factory Service Manual I have says that I have to have an ECU test harness.

Anybody know where to find one of these?

 

I would back probe the harness instead of buying a test harness. Get pins so u can back probe the connector and hook up your leads to the pins. This is the easiest way to test your components.

 

What do you mean back probe? and what type of pins? I think you may be saying to probe from the back of the harness where it plugs into the ECU. Can you get an accurate voltage reading doing it this way?

 

yes you are correct, use the type of pins they use to Hem your pants or other clothing. A paper clip could prolly work aswell. Also you can get correct voltages doing it this way just be careful not to touch the leads together.