Lights Related

[forswami]

Whne i trun on my headlights for a 93 LS 400, the radio/temp lights go out, you cannot see the any of buttons above the gear shift light up. If i turn off the light then all the lights light back up on.

[bartkat]

Whne i trun on my headlights for a 93 LS 400, the radio/temp lights go out, you cannot see the any of buttons above the gear shift light up. If i turn off the light then all the lights light back up on.

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Is the instument dimming knob turned all the way down? That might do it.

[VMF]

something tells me that the bartkat is right :D

[ca12losR]

Hi there I got a '93 LS also and I suffer from the same exact problem. It is not the dimmer knob. All the buttons on the center console(AC/Radio/Hazard/Shifter) don't light up at all, when warmer they will try and light up but qickly die which leads me to believe it's a capacitor. When all my lights are off the backlighting on the radio/AC is ON, but when I turn on the headlights/Parking lights the backlight turns off. I hope this is linked to my Cluster problem. My outside temp. and odometer don't even work no more. The coolant Temp is the only working gauge.

[Lexls]

The instrument cluster is totally unrelated to the radio and climate control unit. ca12, your cluster can be fixed by replacing the capacitors on the circuit board.

[ca12losR]

Hey LExLS you have a great site Man. I looked at diagrams of the control circuit of the cluster. On one of the boards there is a rheostat control circuit which controls all adjustable lights. I am sure that is where my problem is. All these light problem came along with the dying cluster. I am sure of it.

[bartkat]

Hey LExLS you have a great site Man. I looked at diagrams of the control circuit of the cluster. On one of the boards there is a rheostat control circuit which controls all adjustable lights. I am sure that is where my problem is. All these light problem came along with the dying cluster. I am sure of it.

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So it is related to the dimmer. That's the rheostat. :D

[ca12losR]

I know what you mean Barkrat. the dimmer knob controls the rheostat lighting by turning it. but like i said earlier the rheostat has circuits on the notorious cluster board which leads me to beleive that there is yet more capacitors that fail on these boards, after enough people suffer from what swami and I have, maybe then jim walker or someone else will look into other parts of the board.