99-05 PCM Circuit 1020

[Brads_rs]

Can someone tell me what circuit 1020 does in the PCM? Its located in the blue connector (C1) Pin 75. Cars (LS1) don't use it but the trucks do. I realize its an ignition hot, but just wondering why the cars use it and trucks don't.

Thanks in advance.

[joecar]

I'm looking thru 2001/2002 F-car schematics and I don't see circuit 1020... I'll tear my hair out.

[SS2win]

looks like switched 12v to me but I don't know why. Pink wire....

20476

[turbo_bu]

FWIW - I have seen this circuit labeled as "PCM Ignition Supply - Off/Run/Crank Voltage" and "Ign 0 fuse - Acc/Run/Start Voltage". Not sure if it's doing something special or not, but those are some of the descriptions I have seen in the truck / van schematics.

[joecar]

I looked in the 2001 F-car connector diagram, C1:75 is listed as not used.

[turbo_bu]

joecar,

Correct, it's not used in the Camaros. It appears to only be used in the trucks / vans.

[Highlander]

Wonder if its for remote start features?