Engine-Codes - Chevrolet - B3873 Chevrolet

B3873 Chevrolet Code - Front Washer Relay Circuit

- Code Popularity: 2,693 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC B3873 Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Front Washer Relay
  • Front Washer Relay harness is open or shorted
  • Front Washer Relay circuit poor electrical connection
  • Faulty Body Control Module (BCM)

Code Tech Notes

B3873:01 Front Washer Relay Circuit Short to Battery
B3873:02 Front Washer Relay Circuit Short to Ground
B3873:04 Front Washer Relay Circuit Open

⚠ Does your Chevrolet have Safety Recalls? → Check here

How to Fix the DTC B3873 Chevrolet?

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 pins.

Search for B3873 Chevrolet Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B3873 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the B3873 Chevrolet Code Mean?

The windshield washer function is controlled by the Body Control Module (BCM). When the washer switch is pressed, low reference is applied through the switch contacts and the signal circuit to the body control module indicating the wash request. The body control module then applies voltage through the control circuit to the coil side of the windshield washer pump relay energizing the relay. With the relay energized, battery voltage from the fuse is applied through the switch contacts of the relay and the control circuit to the windshield washer fluid pump.

B3873 Chevrolet Code - Front Washer Relay Circuit

Need more Information on the Code?

Need more information on how to fix the B3873 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3873 Chevrolet code diagnosed by a professional: Find a repair shop in your area