PRSUIT460

iTrader: (3)

I have a nearly a 1 amp drain traced down to Fuse 25 which is interior lighting. Nothing is lit up when the car is off and the doors are closed. Is there a module that possibly would need replacing or causing the drain?

rkw77080

I assume you're talking about your 2004 LS430... Fuse #25 in in the passenger-side fuse box. It's a 10A fuse called "DOME". Please note that the LS430 keeps the lights on for you for some predetermined amount of time after the engine is off and all doors (also hood and trunk lid) are closed. So if the drain is measured, say, with the passenger door open, it is technically not a "drain".

PRSUIT460

iTrader: (3)

Yes my 2004. No doors were open and no lights were on while troubleshooting the drain. The dome fuse was where the major drain was coming from.

rkw77080

OK, now that we got the easy stuff out of the way... It's time to dig a little deeper.

Here's a electrical schematic showing what the 10A "DOME" fuse is powering - namely the "Combination Meter". Once the circuit leaves the Passenger-side fuse box, the next connector is "J10", then onward to the "C12" connector on the combination Meter. I've attached sketches of where you will find the connectors. Personally, I'd start at the furthest point (terminal 13 of C12 connector). If it checks out OK, then move to the next connector (J10), and so on.

rkw77080

May I also ask how did you measure drain across the "DOME" fuse? Did you pull the fuse and put your test leads across the terminals, or did you use an Amp Clamp Meter similar to the one pictured below?