I recently bought a 91 LS 400. Car is sweet with a couple of quirks such as the speedometer and rpm gauge doesn't work, but the fuel gauge does. Is this a relay or a computer ?


Asked by Jul 13, 2011 at 07:42 PM about the 1991 Lexus LS 400 RWD

Question type: Maintenance & Repair

3 Answers


It wont be a computer. Too old to be a computer, even in a Lexus. I would inspect the speed sensor operation if the odometer does not work as well. You may have to have a technician take a look at that. As far as the tachometer goes, the circuit that controls that may have a open or be faulty. Something else a technician may have to properly diagnose. I looked it up in alldata quickly, and those are two quick options. With more info I may be able to help you more

1 of 1 people found this helpful.

tap on your cluster glass should come on or replace cluster

The "tap" worked first try. Lol. Thanks

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