Thread: Lighting issues

Sounds like dirty or burnt out contacts in the headlight switch - the dash illumination is fed from the park light circuit.

You can actually disassemble the switch with some care, and scrape the dried up hard old grease off the contacts, give it a burst with contact cleaner, and then some fresh contact treatment grease.

Mine used to have about a second delay between turning the switch on and the dash lights coming on, until suddenly you had to jiggle the switch a few times to get them working.

X2 as EvilGTV said. If it works, not works in response to switch movement it is the switch.

Do you have any odd symbols on your dash display where your gear selection/odometer normally shows, or, do you have any alarm setting issues. I struggle to remember the exact symptoms of my situation, but the problem was one blown park bulb. Because it is linked to the alarm, it caused havoc with the alarm, the lights when running, and indicators. Also re Shuy's reply that is mostly true, but its not simply a switching wire to relay, to light setup. A switching signal also goes to the BCU, which can then influence operation.

cheers
Nick

Very true regarding the switch not directly operating a relay but going via BCU. But if the switch has intermittent( dirty/ broken/ burnt contacts) signals to the BCU it will interpret it as a fault and shut that circuit off.
The systems in a D2(or any computer oriented car) relies on a clear constant signal from whatever job its asked to do, if that is not present or a system check does not come back clean it has a hissy fit and throws up a fault if able to or shuts the particular system down as a safety/ preventive measure . The primary source, eg a switch, or the final destination , eg a light bulb, Are , or should be, your first ports of call in this sort of faults.
Cheers Scott