I went to junk yard got me another ECM.I put it in my S-10 and the 2
sec. signal is back again,for how long I don't know.It has 2 relays and
I switched the orange & gray wire around in the relay socket on the fire
wall,gray in B & Orange in D socket like it was in the 1 on the fender.I
hope I got the wires like they supposed to be.Does anyone here know if
someone switched the wires,before I got the truck,if maybe this could
possibly destroy the 2 sec.signal in the Ecm?I have Gm shop Manuals but
on some things they don't cover.The first ecm had a AMRW prom and now it
has the same one.The other had a ATBA prom which seemed to shift the
trans.at a higher speed 50 mph,The other would shift at 40.Does the prom
control the tc shift?I'll post back the results if I loose the
2sec.signal again.
Thanks for any replies! Bobby

I appreciate the help on the ECM problem I was having.You was right on
about the tan-white wire on fuel pump.Since mine has extra relay for
guages,it was gray and the factory manuals I have didn't show that.But I
finally figured that out,after destroying a relay and a ECM,because
someone had switched the 2 fuel pump relay wires on the redundant
relay.I have driven it for several days and the 2 sec.signal is still
there and the code 54 has not appeared again.
Thanks Again! Marsh Monster!
Bobby