What wire color and circuit feed the starter relay on a 1996 Bronco?

Circuit 32, a R/LB (red/light blue) wire, feeds the starter relay from either the manual transmission branch or the Transmission Range sensor on automatics, passing through connectors C103M/C103F.

What does the Transmission Range (TR) sensor do in the starting circuit?

On E4OD or 4R70W automatic transmissions, the TR sensor (connector C1012) allows the driver to start the vehicle only in the "PARK" or "NEUTRAL" position. Component testing is referenced on page 93-1 and the service manual.

What is the function of the starter relay?

Per the diagram callout, the starter relay controls current flow to the starter motor during engine starting.

Where are the grounds for the 1996 Bronco starting system?

G101 (body ground) and G103 (engine ground), both connected with BK (black) wires.

What connector links the starter relay wiring to the starter motor/solenoid?

Connector C116, with an R (red) wire running from the starter relay to the starter motor/solenoid.

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1996 Ford Bronco Starting System Wiring Diagram - Starter Relay & TR Sensor

1996 Bronco starting system wiring diagram with starter relay and TR sensor

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1996 Ford Bronco starting system wiring diagram showing the starter relay, solenoid, transmission range sensor and battery.

AI caption July 2017 · Photo 282 of 386

This document is a scanned starting system wiring diagram, page 20-2, labeled "96 Bronco," applicable to the 1996 Ford Bronco. It shows the starter circuit from connector C202 (continued from page 20-1) through circuit 33 (wire color W/PK) across connectors C103M/C103F, splitting into two branches: one for manual transmission and one for the E4OD or 4R70W automatic transmissions. The automatic branch passes through the Transmission Range (TR) Sensor at connector C1012 (component testing referenced on page 93-1 and the service manual), which allows the driver to start the vehicle only in PARK or NEUTRAL. Both branches continue on circuit 32 (R/LB wire) to the starter relay, which controls current flow to the starter motor during engine starting. From the relay, an R (red) wire runs through connector C116 to the starter motor/solenoid, with heavy R cables connecting to the battery. Grounds shown are G101 (body) and G103 (engine), both with BK (black) wires. Voltage test values ('0V at START, '0V at P or N, '0V relay energized) are annotated at test points. A reader can learn wire circuit numbers, colors, connector identities, ground locations, and the current path for diagnosing no-start conditions.

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Frequently asked questions

What wire color and circuit feed the starter relay on a 1996 Bronco?: Circuit 32, a R/LB (red/light blue) wire, feeds the starter relay from either the manual transmission branch or the Transmission Range sensor on automatics, passing through connectors C103M/C103F.
What does the Transmission Range (TR) sensor do in the starting circuit?: On E4OD or 4R70W automatic transmissions, the TR sensor (connector C1012) allows the driver to start the vehicle only in the "PARK" or "NEUTRAL" position. Component testing is referenced on page 93-1 and the service manual.
What is the function of the starter relay?: Per the diagram callout, the starter relay controls current flow to the starter motor during engine starting.
Where are the grounds for the 1996 Bronco starting system?: G101 (body ground) and G103 (engine ground), both connected with BK (black) wires.
What connector links the starter relay wiring to the starter motor/solenoid?: Connector C116, with an R (red) wire running from the starter relay to the starter motor/solenoid.