Headlights intermittent. driving me mad!

My headlights on my 2015 Proace are driving me crazy. the lamps work Ann I have voltage at the connector. main beam is fine but no low beam. Any ideas? much appreciated

As far as I'm aware the bulbs are twin filament H4s. So have the low beam filaments gone?? If so, new bulbs.

new and old bulbs are fine. issue continues

Hi Steve,Check and test the low beam fuses with a multimeter. Swap the low beam relay with another identical one to test. As you have already checked the bulbs I would have suggested testing with a known good bulb. Inspect the wiring for damage or corrosion and clean connectors with electrical contact cleaner. Test the headlight switch for continuity with a multimeter when in the low beam position. Ensure ground wires are secure and free of corrosion. Measure the voltage at the low beam connector while lights are on, it should be close to the Battery voltage. If equipped, the lighting control module might be faulty, requiring diagnostic tools. Check if the DRL module is interfering with the low beams. Hope this helps.

thanks. all good other than can't find the relay. manual is useless. fuses must be good as they are intermittent. ground is good or high beam wouldn't work

Hi Steve, YouTube sometimes have diagrams that may show the relay location.