AutoCodes – Generic – B0785:01

B0785:01 Code - Two Wheel Drive High Range Indicator Circuit Short to Battery

Quick Answer

The Two Wheel Drive (2WD) High Range (HI) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, an LED, and an LED control circuit. Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B0785:01 indicates Two Wheel Drive High Range Indicator Circuit Short to Battery.
Common causes: Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 307

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code B0785:01 Description

The Two Wheel Drive (2WD) High Range (HI) indicator circuit consists of a Light Emitting Diode (LED) feed circuit, an LED, and an LED control circuit. The indicator dimming control circuit is the LED feed circuit and continuously supplies B+ to the 2WD HI, 4WD Auto, 4WD HI, and 4WD LO LEDs. When the 2WD HI mode has been selected by the driver, the Transfer Case Shift Control Module (TCCM) provides a ground through the 2WD HI indicator control circuit illuminating the LED.
The TCCM tests the 2WD HI indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming control circuit by grounding the 2WD HI indicator control circuit for 2 seconds during the Bulb Test at key ON.
The Diagnostic Trouble Code (DTC) will be set when the TCCM detects 3.4 V or greater on the 2WD HI indicator control circuit when the 2WD HI indicator is commanded ON.

OBDII Code B0785:01 - Two Wheel Drive High Range Indicator Circuit Short to Battery - AutoCodes.com — B0785:01 Code - Two Wheel Drive High Range Indicator Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC B0785:01?

Faulty Transfer Case Select Switch
Transfer Case Select Switch harness is open or shorted
Transfer Case Select Switch circuit poor electrical connection
Faulty Transfer Case Shift Control Module (TCCM)

How to Fix the DTC B0785:01?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0785:01 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.