OBD Guide
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B1437

Wiper Hi/Low Speed Relay Coil Circuit Short To Ground

B1437 is an OBD-II diagnostic trouble code meaning: Wiper Hi/Low Speed Relay Coil Circuit Short To Ground. Common causes: short circuit to ground in wiring harness, faulty wiper relay. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Windshield wipers not working
  • Windshield wipers only operate at one speed
  • Windshield wipers turn on spontaneously

Causes

  • Short circuit to ground in wiring harness
  • Faulty wiper relay
  • Wiring damage
  • Problems in the control unit

How to Fix

  1. Check the windshield wiper relay for damage.
  2. Inspect the wiring harness for damage or short circuits.
  3. Check the relay coil circuit using a multimeter
  4. If necessary, replace the relay or repair the wiring

Related codes

B1438B1439B1440

FAQ

What does the B1437 code mean?

B1437 is an OBD-II diagnostic trouble code that indicates: Wiper Hi/Low Speed Relay Coil Circuit Short To Ground

What causes a B1437 error code?

The most common causes of B1437 include: Short circuit to ground in wiring harness; Faulty wiper relay; Wiring damage; Problems in the control unit.

How do I fix a B1437 diagnostic trouble code?

To fix B1437: Check the windshield wiper relay for damage.. Inspect the wiring harness for damage or short circuits.. Check the relay coil circuit using a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1437?

Limited driving only, diagnose soon

How much does it cost to fix B1437?

The estimated repair cost for B1437 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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