Also, this has arised my curiousity. I am trying to grab the intermittent codes for the SES light, and I always used to hear a fan running when I would jump A and B terminals together. Well, I thought maybe the ECU had a fan, and it would turn on when you jump the codes, because maybe it gets hot, who knew? Well, I had the hood open this evening, and the door open, and it was significantly louder this time. So, I decided to check it out, and found that both the high and low speed fans were running! Maybe, instead of getting deep into the wiring, there is an easier method to getting both fans running, perhaps there is a simple method, other than jumping A and B terminals! I will investigate tomorrow, it is already dark here.
'89 SSE - GX3 -190k, 155k on body - Back for another ride.