I have a 5.3 with 98 ECU swapped into a 89 Firebird, I rebuilt the wiring harness because it was ugly and i have forgotten where pin F from the c207 goes.

Based on some notes from pocket I found whats listed below, how ever PCM fuse confuses me, I clearly have a ECU pin attached to the wire coming from pin F. all the other wires on the C207 are correctly wired.

Anyone know where on a 98 ECU i might have had this pinned?

Thanks


A Not used
B INJ 1
C MIL
D Fan fuse
E Not used
F PCM Fuse
G INJ 2 fuse
H Not used
J Not used
K Speedo (remember to bypass the buffer box
L Not used
M Cluster GRD
N Not used
P Not used
R Not used

 

ECU and ECM are synonymous, sometimes mixed with PCM. In a more literal meaning, the first two control only the engine function and the later also controls electronic automatic transmissions. From a computer fuse perspective, its makes no difference

C207 F goes to the computer IGN/12v switched pin(s), not battery or constant 12v. Instead, those join up with the fuel pump relay 12v in the external 20A fuse holder near the battery

For 97-98 PCMs, the IGN pin is B19 same as 99-03. One of the few pins that dont move

http://lt1swap.com/1998_ls1_pcm_pinouts.htm

 

Thanks pocket!