300ZX Digital Dash Fix!
this gets asked so much I decided to write a page about this for all the
people with the digital dash blues. 99% of the time the problem is with
the amplifier box that controls the display, not the head unit itself.
The problem usually start out intermittent and progresses to failure..
It mostly affects the temp/fuel gauge cluster but can affect any part of
the display depending on which pins are affected.
off the amplifier is located under the lower dash cover on the drivers
side. After removing this lower cover you can see the amplifier as a silver
box to the right of the steering column. It's about 5X5 inches square.
There are three 10mm headed bolts/nuts holding it in and two plugs into
the top of it. After you get it out, remove the cover and you'll see the
back of the board. The problem is the solder joints where the pins for
the connectors attach to the board itself develop hairline cracks. All
that needs to be done is to use some fine electronic solder and a small
soldering iron and flow some new solder onto all of these joints.. After
soldering just reinstall everything and enjoy your newly repaired digital
this doesn't work (doubtful it won't, but have seen it) the amp itself
is dead and suggest finding a used one AND resoldering it before installing
as this is a very common problem. Anyway here's a picture of the problem
Picture by http://web.raex.com/~photo