Weird alternator light behaviour

[1uzfe]

Hi I have registered before, but couldn't remember user or password as old pc gone.

I have a very odd alternator light issue, the light does not come on until you crank and it briefly lights and then goes out- Battery not charging.

if I pull main power cable by unbolting it the Battery light will appear with ignition on and engine not running

if I understand correctly the grey plug should have Battery light, sense and a start wire.

Has anyone had a similar issue and if so an idea of wiring or alternator fault please

 

thanks

 

[steve2006]

Hello and welcome back to the LOC.

Have you checked the 120A alternator fuse link located within the engine bay fuse box, this is not the normal plug in type blade fuse but a screw terminal device with a clear plastic cover on top.

Also check the fuses labelled ALT-S (7.5A), ECU-IG (10A) and GAUGE (10A) as all these are associated with the charging system.

If you would like a copy of the OEM manual diagram section send me a PM.