Zenon Headlight issue... Maybe....

[roadster198]

I have an R129 1998 SL320. When I switched on the headlights to-day they came on as normal but as I went to drive away one of the zenons went out and the warning light came on the dash. I switched them off and back on and all was well warning light went out. Then about twenty miles later going over a bump it went off again. I switched on and off and again all was well. I'm hoping it's just a lose connection as I see on other threads how expensive these lights are.

Can anyone shed some light on what might be the issue?

Thanks

 

[television]

This could be a faulty bulb or connection, you could start by swapping the bulbs from side to side. They are not expensive now on Ebay and best bought in pairs to get a good colour match.

It could be a dry joint on the controller ECU or the igniter

 

[roadster198]

This could be a faulty bulb or connection, you could start by swapping the bulbs from side to side. They are not expensive now on Ebay and best bought in pairs to get a good colour match.

It could be a dry joint on the controller ECU or the igniter

Can you tell me where the controller ECU is located under the bonnet? Is it easy to spot?

Thanks

 

[television]

85 or 90 it could be in or under the lamp

 

[Naraic]

A loose earth did the same for mine.

 

[roadster198]

A loose earth did the same for mine.

Where on the R129 can I check if this is the case?

 

[Naraic]

Where on the R129 can I check if this is the case?

There are earths all over the car. They are brown wires attached to the body/chassis. The one closest to the offending headlamp is the one to look for. In my car it was under the bonnet behind the headlamp.