Troubleshooting 7-Way Tester Malfunction On a 2016 BMW X5 With Factory 7-Way Connector

Updated 05/05/2023 | Published 05/04/2023

Products Featured in This Question

Pollak 7-Way to RV Socket LED Circuit Tester - Vehicle End

(155)

$39.20

Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End

(177)

$36.21

Question:

A standard 7-way trailer plug tester does not seem to work on my 2016 BMW X5. Left, right, and tail light LEDs blink together all the time. Is there a particular 7-way tester that works with BMWs? Thanks.

asked by: RICARDO I

Expert Reply:

You will need the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 to use with your Tester # PK12741. The 7-way systems on a lot of European vehicles are very sensitive and require this adapter when being used with a tester or trailer with LED tail lights.

expert reply by: Bud M