B3885

Trailer Left Tail Lamp Circuit

Severity

✅ Low

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–33 (est.)

Symptoms

The left side light does not light up when the trailer is secured
warning on the dashboard
error in control unit memory

Causes

burnt out lamp
wire harness break
oxidation of contacts in the connector
faulty relay
problem with the control unit

How to Fix

Check the lamp in the left side of the trailer
Inspect the wiring harness for breaks
Clean the contacts in the connector
Check relay
Scan the control unit for other errors

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