LSneewb

My instrument cluster is acting up and Lexus dealer is not sure if its the fuse box or the cluster itself. Anyone heard of the instrument clusters failing or acting weird on the LS430?

YODAONE

If "acting up" like a child, then we might advise time out.

Oftentimes electrical supply issues.

Without more specifics or conditions, a few blind comments:

1.) If original fuses, possibly tarnished or oxidized fuse sockets. Inexpensive to replace all. See:

https://www.clublexus.com/forums/ls-...400-fuses.html

2.) Check battery terminals and negative ground points...if ground point bolts are rusting, replace them. Inexpensive.

3.) Battery and alternator original? Test both. If battery 5 years or older, replace with largest capacity battery that will fit.(have had good experience with Interstate brand)

4.) Not sure on LS430, but on LS400, if moonroof drains are clogged, then water travels up and over the drain valley and leaks down over connector bulkhead on right side of vehicle kick panelThis causes the body ECU multiplexed wiring to short out.

5.) Check integrity of positive battery cable terminus connection.

6.) Chassis to engine and chassis to transmission ground straps?? See:

https://www.clublexus.com/forums/ls-...ound-wire.html

Jabberwock

The company (SIA or SAI I think? ) that repairs ECUs also repairs gauge clusters. Most of the problems reported on the forum over the years with gauge clusters were electrical and related to water leak, flooding, or fuse box issues.

LSneewb

Thanks guys. I didnt think there were many electrical faults caused by the cluster itself by searching this forum. My cluster works just fine except the power to it cuts out everytime I turn the car off and wont come back till I take out the MPX-B2 fuse and put it back in. I think I will start with changing out the fuse box at the passenger side foot well. I found one on ebay for $45.

LSneewb

Update...a whole 3 months later and I have finally solved the problem that Lexus wanted $3400 to fix and I did it for about $200.

The instrument cluster was the issue. Apparently it had some sort of a short and every time I would disconnect the battery and reconnect it would work fine until the next time I shut off the car after which cluster would remain dead. Only blinkers worked.
I first swapped out the fuse box at passenger side first because the Lexus dealer in Wilmington, DE said out of the cluster or fuse box "Its most probably the fuse box" . Well that didnt work. Checked with @TaninAuto first but they could not repair my cluster and wanted $450 for a used one. (Fyi...None of the online sellers are selling a brand new 2005 instrument cluster anymore-its permanently out of stock). So.... I found a 2004 instrument cluster on ebay which is the same part for my 2005 for $115 shipped and had it reprogrammed to my mileage for another $90. I swapped its scratched up screen with my original cluster screen and presto my LS is back!

So basically if your cluster starts acting up, it probably needs to be changed. I hope this helps someone

Gula

Do you still have the part number for your 2005? My car is a UAE spec 2005, my multi information display is starting to fade out from left hand corner and the first few letters are disappearing with time (actually looks burning out slowly), I'm trying to find out if I can buy a US spec cluster on ebay and directly swap it out with my current one.

Thanks!

LSneewb

Here u go

Gula

Thanks for the photo. The multi information display is listed as a separate part on several parts suppliers' websites for a whopping $1200. I went ahead and ordered a used cluster, I'm gonna pick it apart when it gets here and maybe do a short write-up if I'm successful in replacing that small display, this way, I can avoid the odo reprogram.🤞

jimisbell

Did you solve it? My display just went dark. The car works but the instrument cluster is DARK