OBD Guide
ENFRDEESPT

B1374

Illuminated Entry Relay Short To Ground

B1374 is an OBD-II diagnostic trouble code meaning: Illuminated Entry Relay Short To Ground. Common causes: short circuit of the backlight relay wiring to ground, faulty backlight relay. Estimated repair cost: $22–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–56 (est.)

Symptoms

  • Interior lighting does not work when doors are opened
  • The backlight turns on randomly
  • Lights flash when doors are opened
  • The battery is running low

Causes

  • Short circuit of the backlight relay wiring to ground
  • Faulty backlight relay
  • Damaged wiring harness
  • Corrosion of relay contacts or connectors

How to Fix

  1. Check the condition of the input backlight relay
  2. Inspect wiring for damage or short circuit
  3. Check relay contacts and connectors for corrosion
  4. Replace relay if necessary
  5. Check the operation of the backlight after repair

Related codes

B1375B1376B1377

FAQ

What does the B1374 code mean?

B1374 is an OBD-II diagnostic trouble code that indicates: Illuminated Entry Relay Short To Ground

What causes a B1374 error code?

The most common causes of B1374 include: Short circuit of the backlight relay wiring to ground; Faulty backlight relay; Damaged wiring harness; Corrosion of relay contacts or connectors.

How do I fix a B1374 diagnostic trouble code?

To fix B1374: Check the condition of the input backlight relay. Inspect wiring for damage or short circuit. Check relay contacts and connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1374?

Limited driving only, diagnose soon

How much does it cost to fix B1374?

The estimated repair cost for B1374 is $22–56. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat