AutoCodes – GMC – B3702 GMC

B3702 GMC Code - Intermittent Wiper Delay Input Circuit Low

Quick Answer

The intermittent switch in the windshield wiper washer switch is a voltage divider connected across the Body Control Module (BCM) inputs circuits windshield wiper switch signal circuit and windshield wiper switch low reference circuit. Common causes include Faulty Windshield Wiper Washer Switch, Windshield Wiper Washer Switch harness is open or shorted, Windshield Wiper Washer Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B3702 GMC indicates Intermittent Wiper Delay Input Circuit Low.
Common causes: Common causes include Faulty Windshield Wiper Washer Switch, Windshield Wiper Washer Switch harness is open or shorted, Windshield Wiper Washer Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 746

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3702 GMC Description

The intermittent switch in the windshield wiper washer switch is a voltage divider connected across the Body Control Module (BCM) inputs circuits windshield wiper switch signal circuit and windshield wiper switch low reference circuit. The front wiper relay is energized by the BCM switching the front wiper relay control circuit to ground. The Diagnostic Trouble Code (DTC) sets when the windshield wiper switch signal circuit is shorted to ground or less than 0.20 volt.

OBDII Code B3702 GMC - Intermittent Wiper Delay Input Circuit Low - AutoCodes.com — B3702 GMC Code - Intermittent Wiper Delay Input Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3702 GMC?

Faulty Windshield Wiper Washer Switch
Windshield Wiper Washer Switch harness is open or shorted
Windshield Wiper Washer Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3702 GMC?

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 B3702 GMC 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.

Frequently Asked Questions about B3702 GMC Code

What does the OBDII code B3702 mean for a GMC vehicle?

The B3702 code indicates a problem with the intermittent wiper delay input circuit, specifically that the circuit voltage is low, which can affect the wipers' operation.

What are common symptoms associated with the B3702 code?

Common symptoms may include malfunctioning intermittent wipers, wipers not responding to delay settings, or wipers operating erratically.

What could cause the B3702 code to be triggered?

Possible causes include a faulty wiper switch, damaged wiring or connectors in the wiper circuit, or a malfunctioning body control module.

How can I diagnose the B3702 code?

To diagnose, check the wiper switch for proper function, inspect wiring and connectors for damage, and test the voltage at the wiper delay input circuit using a multimeter.

What should I check first if I encounter the B3702 code?

Start by inspecting the wiper switch and associated wiring for any visible damage or loose connections, as these are common culprits.

Can I drive my vehicle with the B3702 code?

While you can drive the vehicle, you may experience issues with your wipers, which can be a safety concern, especially in adverse weather conditions.

What repairs are typically needed to fix the B3702 code?

Repairs may involve replacing a faulty wiper switch, repairing or replacing damaged wiring, or, in some cases, replacing the body control module.

Are there any temporary fixes for the B3702 code?

A temporary fix may involve manually operating the wipers or using them in a constant mode until the issue can be properly diagnosed and repaired.

How can I prevent future occurrences of the B3702 code?

Regularly inspect the wiper system for wear and tear, ensure connections are secure, and address any electrical issues promptly to prevent reoccurrence of the code.