B3650

High Beam Request Signal Circuit Performance Signal Invalid

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–89 (est.)

Symptoms

High beam does not turn on
High beam turns on spontaneously
High beam flashing during operation
Error message on the dashboard

Causes

Open or short circuit in wiring harness
Malfunction of the light switch on the steering column
Problems with the high beam relay
Oxidation of contacts in connectors
Malfunction of the headlight control unit

How to Fix

Check the condition of the high beam circuit wiring harness
Test the light switch with a multimeter
Check relays and circuit fuses
Clean contacts in connectors
Scan the headlight control unit for errors

Related codes

B3651 B3652 U0155