91 Ls400 Display Lights Out

[darknessgrows]

I have an ls400. My display lights started blinking then went out now the lights on my gauges are blinking. what could be my problem and how can I fix it. + as long as I'm asking my speed gauge sometimes works and sometimes doesn't along with my temperature gauge but at different times

[billydpowell]

FIRST: read the stickey's at the top of the posting, there is a wealth of good information in them.... and , welcome to the club, when you find out more, then come back and update and we will try to help you. cheers..

[landar]

Welcome Sonjia.

Your symptoms are intermittent which usually points to bad connections or aging capacitors.

It is really difficult to diagnose this issue without doing some testing first. Many times, it is trial and error. I do not know how 'mechanical' you are or whether you are a DIY'er, but you could begin by checking the connections to your dash and possibly checking the bulbs. There is a site that contains many helpful tutorials -> http://www.lexls.com/tutorials/

In particular, there is a tutorial about removing the dash and may be a starting point for investigation. Perhaps a connector is just loose. Probably more than that but we can always be hopeful ;-) Check this -> http://www.lexls.com/tutorials/electrical/instrumentcluster.html

Finally, you have a 91, so there is a rather infamous issue with the trunk wiring harness that I should mention. Usually, it manifests as weird dash behavior when you use the brakes. See this -> http://www.lexls.com/tutorials/lighting/bulbout.html