What size fuse protects the heater blower circuit in this diagram?

Fuse F 1, rated at 20 AMP, feeds the heater blower circuit from the buss bar via wire 399 BR.

What wire colors go to the rear stop and turn signal lamps?

The L.H. rear stop and turn signal lamp uses circuit 283 Y-BK (yellow-black), and the R.H. lamp uses circuit 282 GR (green). Both lamps also receive 984 BR (brown) from the 285 BR feed.

What circuit feeds the license lamp?

The license lamp is fed by circuit 285 BR (brown) through connector C-505 and grounds at G-503 via a 57 BK wire.

What connectors are in the heater blower motor circuit?

The heater blower circuit passes through connectors C-506 (before the heater blower switch), C-507, C-508 (at the blower motor resistor), and C-509 before the heater blower motor, which grounds at G-504.

What grounds are used for the rear marker lamps?

The L.H. marker lamp grounds at G-501 and the R.H. marker lamp grounds at G-502, both via 57 BK wires.

Home/ Registry/ Ford/ Bronco/ 1966-1977/ 1974 Ford Bronco/ Photo supermotors.net/registry/media/307958

1974 Ford Bronco Wiring Diagram - Rear Stop/Turn, Marker, License & Heater Blower

Wiring diagram of rear lamp and heater blower circuits with wire color codes

‹ ›

Wiring diagram showing rear stop/turn lamp, marker, license lamp, and heater blower circuits with color-coded wires and ground points.

AI caption April 2006 · Photo 77 of 206

This document is one page of a factory-style wiring diagram, uploaded as part of a 1974 Ford Bronco documentation set (filename 74wiring3.jpg). It covers the rear lighting circuits and the heater blower circuit. On the left and center, the diagram traces circuits 283 (yellow-black) and 282 (green) from the buss bar through connectors C-233 and C-320 to the left-hand and right-hand rear stop and turn signal lamps, with circuit 285 (brown) feeding the L.H. and R.H. marker lamps via 984 BR wires through connectors C-501/C-502 and C-503/C-504, grounded at G-501 and G-502. The license lamp is fed by 285 BR through connector C-505 and grounds at G-503. On the right side, the heater blower circuit runs from the buss bar through fuse F 1 (20 AMP), wire 399 BR, connector C-506, the heater blower switch, connector C-507, the blower motor resistor (with red and orange wires), connectors C-508 and C-509, and a black wire to the heater blower motor, which grounds at G-504 via a 57 BK wire. The page grid is marked with columns 33-39 and rows A-F. A reader can identify wire colors, circuit numbers, connector locations, fuse rating, and ground points for these systems.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What size fuse protects the heater blower circuit in this diagram?: Fuse F 1, rated at 20 AMP, feeds the heater blower circuit from the buss bar via wire 399 BR.
What wire colors go to the rear stop and turn signal lamps?: The L.H. rear stop and turn signal lamp uses circuit 283 Y-BK (yellow-black), and the R.H. lamp uses circuit 282 GR (green). Both lamps also receive 984 BR (brown) from the 285 BR feed.
What circuit feeds the license lamp?: The license lamp is fed by circuit 285 BR (brown) through connector C-505 and grounds at G-503 via a 57 BK wire.
What connectors are in the heater blower motor circuit?: The heater blower circuit passes through connectors C-506 (before the heater blower switch), C-507, C-508 (at the blower motor resistor), and C-509 before the heater blower motor, which grounds at G-504.
What grounds are used for the rear marker lamps?: The L.H. marker lamp grounds at G-501 and the R.H. marker lamp grounds at G-502, both via 57 BK wires.