Chevrolet Astro I (1985-2005) Defoggers circuit

BLK WIRE BRN WIRE DEFOGGER ON INDICATOR HOT AT ALL TIMES HTD MIR/ RR-DEFOG FUSE HOT IN RUN HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) PPL REAR DEFOGGER SWITCH REAR DEFOGGER TIMER RELAY REAR WINDOW DEFOGGER GRID RED WIRE RR DEFOG FUSE 5 TIMER UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF FIREWALL)