I have a 1987 Nissan 300ZX. When accelerating the trouble lights below the instrument display come on and flicker. Also the regular headlights either have one, two or none on.

wiring diagrams.

Look for a poor ground connection on the affected bulb socket.

My guess would be one of the main fuses for the headlight switch, or the headlight switch itself.

Hi,
The potential causes of this behavior are multiple.

You will need to bring this car to a mechanic to have the error codes read from the ECU. Any errors stored will immediately point to the cause of the warning lights illuminating on the dash.
Autozone will perform a scan for free - however because your Nissan is a 1987 there are different methods of retrieving codes from these earlier cars which use a much older style of error recording. You will need to check with them first if they have this equipment.
A Nissan dealer of course will be able to do this for you without any trouble. One way to save some money on this is to have the dealer do the diagnostic scan then once the cause is pointed out have the work carried out by an independent mechanic or do it yourself.
Hope this helps. Please do leave a vote for the solution. Many thanks.

brake pedal switch see if you have power on both sides of the switch when the pedal is pressed and activates switch.

Its the connection to the power supply module that is connected to the intrument panel. Its about the size of a cigar box and is silver and is left of the stereo. you will need to remove the panel under the steering colum to access it. wiggle the harness that goes from the inatrument panel to this power supply module until you instrument panel works again. i don't have a permanent soution except to buy a new panel. I am dealing with the same problem.

nissan's have lighting problems on clusters and ac controllers. remove cluster and take it apart, replace bulbs, you can get them from radio shack. its an diy fix, will take about 1 and a half hours and will cost about 10 bucks at most!

Pull headlight knob off, You have to pry the panel off with flathead screwdriver, then you will have access to the switch.

locate the head lights fuses and check,it may be loose

try checking the headlamp sensor mounted on rt front apron behind relay box . this runs all lights .