When I raise my lights with the dashboard switch, they come up together but then after a couple of seconds the L/H one starts to sag a little, then it cycles up and down, and the R/H side will then join in. However, this only happens with the engine running, they work fine with the engine off. Bizarrely I can switch the lights on before starting the engine, then start the car and they are ok. Headlamp flashers work fine, both with the engine on and off.
This has just started happening since I cleaned up the earths and connectors behind the light pods on Thursday in readiness to fit some relays.
What are the collective thoughts chaps?