Power steering control system wiring diagram: I — with Sirius D4 ECU; II - with ECU MR-140 or HV-240; 1 - fuse box in the passenger compartment; 2 - electromagnetic needle valve; 3 - instrument cluster; 4 — power steering malfunction indicator; 5 — power steering control unit; 6 — diagnostic connector; 7 — steering wheel angle sensor; 8 - vehicle speed sensor (manual transmission); 9 — automatic transmission control unit
(The original material is located on the website: «ChevyMan»)