LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Accessories on when the ignition is on?

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Old 09-10-14, 04:36 PM
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RugbyDad
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Default Accessories on when the ignition is on?

I really didn't want to start a new thread for this. But after a few searches (I won't lie and said I searched every known iteration for ignition accessories), I can't exactly seem to find what I need.

So here's what I need. Got some new lights. Want them to be on whenever the ignition is on. Ignition fuse is a 10A under the dash. Wiper fuse is a 20A under the dash. Those would be preferable if not for being inside the cabin. I would like to keep my wires all under the hood. I don't necessarily want to run wires in through either the firewall or through the fender shroud harness.

My question is are there any fuses or relays in the under-hood fuse box that is on with the ignition? And which one would be best to tap into for continuous power?

A 2000 UCF without air suspension. I mention that because under the drivers headlight, I think I saw a relay junction that contained a "Air SUS" relay, along with 2 radiator fan relays and something else I can't recall right now. My radiator only has one fan. The A/C condenser, or clutch or whatever that assembly is, sits in the spot that the other fan would normally sit (I think). Could I tap into those if they are always on with the Ign?

Secondary question: Is there a cleaner way to tap into a fuse/relay other than wedging the wire under said fuse/relay?
Old 09-10-14, 06:08 PM
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DOBones
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Do a google search for "Fuse Tap" you can get them anywhere and they will make things look a little cleaner. Sorry I can't help otherwise.
Old 09-10-14, 06:18 PM
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PureDrifter
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fuse tap + air suspension fuse (if your car is not factory air) + run a wire through the firewall grommet, it isn't hard.
Old 09-11-14, 03:27 AM
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Originally Posted by PureDrifter
fuse tap + air suspension fuse (if your car is not factory air) + run a wire through the firewall grommet, it isn't hard.
So the 40A air suspension fuse that sits in the relay box under the drivers headlight is on whenever the ignition is on? Sa-weet.... No need to go through the firewall grommet if I can just tap that fuse right? And run my ground to any bolt or the negative battery terminal..
Old 09-11-14, 03:19 PM
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it should be switched 12v, yes. wiring diagram to confirm, or a multimeter.
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