B388E

Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$11–56 (est.)

Symptoms

Flashing or non-functioning trailer lights
Dashboard warning
Incorrect operation of the trailer lighting system

Causes

Damaged trailer wiring harness
Short circuit in the headlight circuit
Oxidized or bad contacts in connectors
Faulty trailer control unit (if installed)

How to Fix

Check trailer wiring harness for damage
Inspect the connectors and clean the contacts
Check trailer lights for faults
Test the circuit with a multimeter for short circuit
If necessary, replace damaged wires or connectors

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