dead dash radio etc

[spritley56]

this may have been on before but heho here goes drove car home as normal and left it 4 a few days went to start it as normal car started but no dash lights no radio heater sat nav front central locking computer indicators wipers speedo rev counter  but headlight hazards leccy seats horn all work awe by the way cant get out of park unless u use the overide button 

checked the 120amp white alternator fuse also 80 amp main fuse also 30 amp amp2 fuse replaced them all Battery seems ok  immobiliser only works if u lock the front 2 doors on the key cause they wont lock on the button  didnt do owt with it just stood for a few days and all this happened anyone any ideas why

took Battery off to charge now it turns over ok but wont fire either now

its a 2000 w reg ls400 

[BentleyBeater]

Hello Bob.  I have the same year and model. The items you list as working are

all direct feed, whereas the other non-working items are all ignition controlled.

Sounds to me as if you have lost feed from the ignition switch to fuse box.

Did the steering column move on inserting the key?

Hope this helps a bit !  Les

[spritley56]

12 minutes ago, BentleyBeater said:

Hello Bob.  I have the same year and model. The items you list as working are

all direct feed, whereas the other non-working items are all ignition controlled.

Sounds to me as if you have lost feed from the ignition switch to fuse box.

Did the steering column move on inserting the key?

Hope this helps a bit !  Les

no column didn t move but the car turns over on the key which is past the ignition controled items its weird

[steve2006]

Hello Bob,

I have the OEM electrical manual for the 2000 LS400 and fortunately can understand it, the common factor is the 40A AM1 fuse located in the engine bay fuse board it should be at the opposite side of the AM2 fuse ( may be shown on the inside of the fuse box cover).

This fuse feeds both front doors via 2 seperate 20A fuses which are constantly live and also feeds the heater,wipers,gauge,indicators,ECU 1G and PWR 1G circuits via individual fuses and all switched via the ignition switch, the last one PWR 1G feeds the ignition main relay which may be the reason the car fails to start but turns over.

So check fuse AM1 rated at 40 Amp and please come back and let us know the outcome.

[spritley56]

3 minutes ago, steve2006 said:

Hello Bob,

I have the OEM electrical manual for the 2000 LS400 and fortunately can understand it, the common factor is the 40A AM1 fuse located in the engine bay fuse board it should be at the opposite side of the AM2 fuse ( may be shown on the inside of the fuse box cover).

This fuse feeds both front doors via 2 seperate 20A fuses which are constantly live and also feeds the heater,wipers,gauge,indicators,ECU 1G and PWR 1G circuits via individual fuses, the last one PWR 1G feeds the ignition main relay which may be the reason the car fails to start but turns over.

So check fuse AM1 rated at 40 Amp and please come back and let us know the outcome.

cheers 4 that is there any chance u could email me a wiring diagram for this section we are talkin about please

[steve2006]

Just now, spritley56 said:

cheers 4 that is there any chance u could email me a wiring diagram for this section we are talkin about please

If you PM me your email address I'd be glad to, don't like posting copyright stuff on the forums.

[spritley56]

2 minutes ago, steve2006 said:

If you PM me your email address I'd be glad to, don't like posting copyright stuff on the forums.

messaged u bud many thanks hope it works the fuse is a 40 amp green1 int it

[steve2006]

I can tell you're from Yorkshire 

Yes a green one, 1st one on the left of the row ignoring the smaller one at the end and lower down 

[spritley56]

32 minutes ago, steve2006 said:

I can tell you're from Yorkshire 

Yes a green one, 1st one on the left of the row ignoring the smaller one at the end and lower down 

aye originally from leeds but now in hull i have anothe ls400 as well a 1996 gold edition with the phone in which actually is in better nick than the w plate 1 also a nissan 300zx tt