B3718 - Front Wiper Relay Drive Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B3718 Possible Causes

  • Faulty Front Wiper Relay
  • Front Wiper Relay harness is open or shorted
  • Front Wiper Relay circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How do I fix code B3718?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the B3718 code

Labor: 1.0

The cost of diagnosing the B3718 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B3718 Description

The Body Control Module (BCM) monitors the control circuit of the wiper relay. The voltage level should be low while the wiper relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the wiper relay control circuit to the coil side of the relay, energizing the wiper relay. The Diagnostic Trouble Code (DTC) sets if the BCM detects a short to battery voltage in the wiper relay control circuit.
OBDII Code B3718 - Front Wiper Relay Drive Circuit High - AutoCodes.com

More Information

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