B1614 — Wiper Rear Mode Select Switch Circuit Short To Ground

Will B1614 clear itself?

Sometimes B1614 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

How do I diagnose B1614 myself?

Start with a scan: confirm B1614, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the body electrical system, and verify the suspect component against live data before buying parts.

What is the most common cause of B1614?

The most common causes are: faulty switch, motor or actuator of the affected system, blown fuse or failed relay, damaged wiring in door jambs or wet areas.

How much does it cost to fix B1614?

Replace the switch or actuator — $120–$450; Repair wiring or connectors — $80–$250; BCM repair or replacement — $300–$900. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Is it safe to drive with B1614?

Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

When your scanner pulls code B1614, the powertrain or body control module has detected a problem with the rear wiper selector circuit. Specifically, B1614 stands for "Wiper Rear Mode Select Switch Circuit Short To Ground" — meaning the switch that commands the rear wiper to cycle through its modes has an electrical path that is bleeding voltage directly to ground when it should not. This is classified as a body electrical fault, and while it will not kill your engine, it will leave the rear wiper inoperable or stuck in one mode.

The rear wiper system relies on a simple signal circuit. When you rotate the wiper stalk to the rear position and select intermittent, low, or high speed, the switch sends a specific voltage signal to the body control module. The BCM interprets that signal and energizes the wiper motor accordingly. If that signal circuit develops an unintended connection to ground — through a damaged wire, water intrusion, or a failing switch — the module sees the voltage collapse and recognizes the short. After the fault persists through enough drive cycles, B1614 is stored and the warning light illuminates.

Common Symptoms of B1614

• The rear wiper fails to operate entirely or will not switch between modes
• Rear wiper runs continuously in one speed and ignores switch commands
• Warning light or service indicator appears on the dashboard
• No change to engine performance, transmission function, or braking systems
• Intermittent operation that comes and goes with moisture or temperature changes
• Related body electrical functions may behave erratically if the BCM is involved
• The rear window may fog or streak in wet conditions due to inoperative wiper

What Causes B1614

• Failed or worn rear wiper mode select switch (most common — internal contacts corrode or break)
• Wiring damage in the tailgate, liftgate, or rear door where flex and moisture are constant problems
• Corroded or pushed-out connectors at the wiper switch or BCM
• Blown fuse protecting the wiper circuit or failed relay
• Faulty body control module unable to interpret the switch signal correctly
• Water intrusion into switch housings or connector cavities
• Chafed wire insulation near hinge areas that short to ground when flexed

How to Diagnose B1614

1. Plug in a scan tool, confirm B1614 is active or stored, and record the freeze frame data. This snapshot tells you vehicle speed, engine load, coolant temperature, and other sensor readings the moment the fault occurred — use it to replicate the failure condition during your road test.
2. Check for any other stored body codes alongside B1614. Often the BCM will set multiple codes pointing to a single bad connection or power feed problem.
3. Perform a thorough visual inspection of the wiring running to the rear wiper switch and motor. Focus on the tailgate area and any points where the harness flexes around hinges — these are the most likely spots for broken insulation.
4. With the switch panel partially disassembled, probe the signal circuit at the switch and at the BCM simultaneously. Activate the switch and watch for voltage on the signal wire. If the circuit shows near-zero volts when the switch is commanding on, you have confirmed the short-to-ground.
5. Wiggle the harness while monitoring live data from the wiper switch and motor PIDs. If the readings jump or drop intermittently, you have found a broken strand or loose pin.
6. Clear B1614, complete a drive cycle covering the conditions noted in the freeze frame, and verify the code does not return before calling the repair complete.

Repair Options and Costs

Replacing a faulty rear wiper mode switch typically runs $120–$450 depending on the vehicle and whether you use OEM or aftermarket parts. If the wiring is the culprit, a connector repair or wire harness splice generally costs $80–$250. In the rare event the body control module itself is defective, BCM repair or replacement with programming falls between $300–$900 at most independent shops.

Total repair cost for B1614 usually falls somewhere between $80 and $900. The spread is wide, but the majority of cases involve nothing more than a bad switch or a corroded connector — both on the lower end of that range. Spend time on diagnosis before spending money on parts.

Driving Safety Verdict

The severity level for B1614 is short — meaning you can continue driving in most situations. Body control codes rarely interfere with engine operation, braking, or steering. The practical risk is reduced visibility in rain or snow when the rear wiper does not function. If the fault is intermittent and conditions are dry, postpone the repair with no safety concern. Address it before your next wet-weather trip or long highway drive where rear visibility matters.