Lights not staying on

[Dominick]

Low beams not working

 

[Dominick]

Dip light go off when driving ….so can not drive at night ,any body know why

 

[NicM]

More van information may help.

 

[Dominick]

Ducato Cheyenne, 160 muilty jet , every thing working fine but as I drive the low beams switch of and I am in the dark .if I quickly switch them on again they might stay for one minute or a bit longer but will go out again .I have checked the relay and replaced just in case , so and idea’s would be great

 

[Andacami]

Vehicle battery fully charged? Getting near 14v on it when engine running?

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[Macca1954]

Bad earth ?

 

[Dominick]

new earth strap fitted ,new battery and checked with meter 13.99 volts

 

[Macca1954]

How old is the vehicle. Might be worth running a separate earth to back of lamp. Costs nothing and eliminates the earth side

 

[Dominick]

08 Ducato . Main beam is fine so earth would be ok I think

 

[Macca1954]

That’s why asking the year. So it’s a double filament bulb ?

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[Landy Andy]

I would start to look at the switch, and see if the contacts have got hot. As voltage passes it causes heat and the contacts can sink into the plastic behind the contact. I’ve know this with other vehicles so could be worth a check on your Ducato
First thought was relay, but you say you have changed this. Have you used test meter on relay to see if you are getting voltage in and out of it. That way you would know which side of relay you had problem.