B3887

Trailer Left Turn Signal Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$11–56 (est.)

Symptoms

Left trailer turn signal not working
Flashing of indicators with increased frequency
Error message on the dashboard

Causes

Broken wire in the left trailer turn signal circuit
Short circuit in the circuit
Turn signal relay malfunction
Connector damage or contact corrosion
Control unit malfunction

How to Fix

Check the integrity of the wires in the trailer left turn signal circuit
Check the contacts in the connectors for corrosion or damage.
Check the operation of the turn signal relay
Check the serviceability of the turn signal itself
If necessary, replace damaged circuit elements

Related codes

B3888 B3886 B3890