B1593
Autolamp Delay Decrease Circuit Short To Battery
B1593 is an OBD-II diagnostic trouble code meaning: Autolamp Delay Decrease Circuit Short To Battery. Common causes: damage to the wiring harness in the delay circuit, short circuit to battery positive. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of automatic lighting
- Headlights do not turn on or turn off automatically
- Illuminated fault indicator on the instrument panel
Causes
- Damage to the wiring harness in the delay circuit
- Short circuit to battery positive
- Auto light relay malfunction
- Problems in the lighting control unit
How to Fix
- Check wiring harness for damage
- Check delay circuit for short circuit
- Test automatic lighting relay
- Check the lighting control unit for faults
- Replace damaged components
Related codes
FAQ
What does the B1593 code mean?
B1593 is an OBD-II diagnostic trouble code that indicates: Autolamp Delay Decrease Circuit Short To Battery
What causes a B1593 error code?
The most common causes of B1593 include: Damage to the wiring harness in the delay circuit; Short circuit to battery positive; Auto light relay malfunction; Problems in the lighting control unit.
How do I fix a B1593 diagnostic trouble code?
To fix B1593: Check wiring harness for damage. Check delay circuit for short circuit. Test automatic lighting relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1593?
Do not drive — repair immediately
How much does it cost to fix B1593?
The estimated repair cost for B1593 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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