B1843 OBD-II Trouble Code: Wiper Front Power Circuit Short to Ground

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1843 code

B1843 is a diagnostic trouble code (DTC) for "Wiper Front Power Circuit Short to Ground". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE B1843 DIAGNOSTIC Get a fair and transparent estimate upfront

B1843 code definition

The B1843 trouble code signals an error with the wiper front power circuit.

What the B1843 code means

The B1843 code is a generic OBD-II trouble code that detects a wiper front power circuit malfunction. If the body control module or the powertrain control module (PCM) receive an abnormal voltage reading from the wiper front power circuit, then the B1843 trouble code will likely be triggered.

What causes the B1843 code?

Potential causes of the B1843 trouble code include:

  • Open or short wiper front power circuit
  • Blown fuse
  • Damaged wires or connectors
  • Defective front power wiper switch
  • Faulty front power wiper motor

What are the symptoms of the B1843 code?

When the B1843 trouble code is detected, the power windshield wipers will likely not work properly. This may mean that the speed of the wipers cannot be controlled, or it may mean that they will not be able to function at all.

How does a mechanic diagnose the B1843 code?

A reputable mechanic will diagnose the B1843 code using a standard OBD-II trouble code scanner. The technician will use the scanner to view the freeze frame data for the code, and to look for additional trouble codes. If there are numerous trouble codes detected, then the technician will need to diagnose them in the order in which they appear. The trouble codes will then be reset, the vehicle restarted, and the B1843 code checked for. If the code is no longer detected, then it was probably erroneously triggered, or an intermittent error.

If the code remains detected, then the technician will begin by checking the fuse associated with the front windshield wiper system. If the fuse is not blown, then the wires and connectors should be visually inspected, and the circuit should be tested. If the issue remains unresolved, the mechanic will inspect the front power wiper switch and motor.

After the mechanic makes any repairs or replacements, the trouble codes should again be reset, the vehicle restarted, and the B1843 code checked for. By doing this, the technician will know as soon as the problem is fixed.

Common mistakes when diagnosing the B1843 code

The most commonly made error when diagnosing this code comes from failing to properly follow the OBD-II diagnosis protocol. It’s very important that mechanics abide by the protocol at all times, to help ensure that diagnoses are efficient, and repairs are proper.

Functional front power wiper switches and motors are often condemned when circuitry and electrical components are overlooked.

How serious is the B1843 code?

The B1843 trouble code may keep the vehicle’s front windshield wiper system from operating. The windshield wipers are an important safety feature, and a vehicle with inoperable wipers should not be driven in rain, snow, or mist. For safety reasons, a vehicle should be inspected as soon as the B1843 code is detected.

What repairs can fix the B1843 code?

Possible repairs for the B1843 trouble code are:

Additional comments for consideration regarding the B1843 code

The B1843 code is a manufacturer specific trouble code. This means that while the code signals a front power wiper circuit malfunction in certain vehicles, it may represent a different issue in other makes. It’s important that technicians always be cognizant of the make and model of the vehicle they are working on when diagnosing the B1843 trouble code.

Need help with a B1843 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

OBD-II
trouble codes
B1843

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1843 code.

SCHEDULE B1843 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2631 OBD-II Trouble Code: O2 Sensor Pumping Current Trim Circuit High Bank 2 Sensor 1
What What the P2631 code means? P2631 is an OBD-II generic code for the engine control module (ECM) detecting an open or short circuit in the Air Fuel Radio (A/F) or O2 sensor, causing a high voltage at the signal...
P0514 OBD-II Trouble Code: Battery Temperature Sensor Circuit Range/Performance
What What the P0514 code means The P0514 code indicates that there is a malfunction in the battery temperature sensor. What causes the P0514 code? There may be one or more causes for the P0514 code. One may be a...
P3408 OBD-II Trouble Code: Cylinder 1 Deactivation/Exhaust Valve Malfunction
P3408 P3408 code definition P3408 is the fault code for Cyl1 Exhaust Valve Ctrl Circ High. Cyl1 specifies that the issue is likely taking place in engine cylinder number 1. What the P3408 code means Late model vehicles with eight...

Related questions

Check engine light came on while driving
The Check Engine Light is an indicator that something is affecting your emissions in a negative way. This can be as simple as a loose gas cap (https://www.yourmechanic.com/services/gas-cap-replacement), to a misfire (https://www.yourmechanic.com/services/engine-is-misfiring-inspection) and many things contribute to the overall emissions...
Is it safe to drive with a misfiring cylinder?
Hey there, thanks for writing in about your Jeep Wrangler. I would recommend getting it checked before going away on your trip. The misfire code may be a problem with the variable valve system or the ignition system. With this...
I believe one of my ignition coils is bad, how can I test to see which one is bad?
The only way to determine exactly which ignition coil is damaged is to have a professional mechanic complete a diagnostic scan and download all error codes. The OBD-II error codes will pinpoint the source of engine issues. Having a mechanic...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com