Need help!!

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Apr 2, 2023 | 09:08 PM

ptimoney

Thread Starter

1st Gear

Joined: Apr 2023

Posts: 1

Likes: 0

From: oregon

Need help!!

Just bought a 2002 ls430. The interior lights don't work; and none of the accessory functions such as power locks, windows and wipers operate unless the engine is running.

Apr 3, 2023 | 01:50 PM

weldthedif

Instructor

Joined: Jul 2017

Posts: 928

Likes: 238

From: South Carolina

that is an interesting problem. i suggest disconnect the battery, and pull out and test every single fuse and relay from your electrical box as a start. you can buy a relay tester on amazon

Apr 4, 2023 | 04:11 AM

BigBoomer

Racer

Joined: Mar 2018

Posts: 1,282

Likes: 384

From: ESSEX, UK

Sounds like a duff battery to me. Since the LS430 uses a CANBUS, low battery voltage can cause all kinds of weird effects.
Once you start the engine the alternator will be supplying 13.8volts so the CANBUS will work as it should.
Fit a new battery even if yours seems to be OK and starts the engine.
If it's not that, then there is a problem with some of the relays.