I understand this is a common problem for a 1986 300zx, so maybe it pertains to your car also. There might be weak solder on the power unit pin connector, or it might need repair to the power control unit. This can also affect the odometer.
why do my lights flicker and interior lights flicker
Alternator is failing.
The primary causes for the lights to flicker inside on a 2002 Chrysler Sebring LXI is a loose bulb or wire. This can occur when the vehicle has experienced rough road conditions and excessive vibration.
Your lights may flicker because they power is really low. It is very common for them to flicker when there is a storm out.
There are several things that can cause your 1996 Nissan dashboard lights to flicker. The most common cause is a bad ground wire. Check the ground wire to make sure it is tight and free of corrosion.
Flickering lights, on a Cadillac STS, is usually a sign of a loose wire. When all of the lights flicker, it is an indication of a loose battery ground cable.
A terribly designed Body Control Module, courtesy of Chrysler!
no
An elf under the hood who's disconnecting and re-connecting the battery terminals!
Its the hash-slinging slasher.
problem resolved
Possible electrical problem