Lost power to high load aux switches

[Farkleface]

Lost power to aux high load switches ?

Added some Baja designs lights to 25amp factory location under hood. They worked for a few days and then lost power. Also lost power to most aux switches (winch, roof taps, under hood power taps)
I have checked all fuses that are related to that system and they are all good ? Any ideas ?

 

[TheDocAUS]

Lost power to aux high load switches ?

Added some Baja designs lights to 25amp factory location under hood. They worked for a few days and then lost power. Also lost power to most aux switches (winch, roof taps, under hood power taps)
I have checked all fuses that are related to that system and they are all good ? Any ideas ?

Did you also check all the fuses in both busbars? And the High Load Auxiliary Switch Panel fuse box?

Post in thread 'Littelfuse FHZ busbars used in the Grenadier'

Sep 13, 2023

PART 2- HOW INEOS USES THE LITTELFUSE BUSBARS IN THE GRENADIER

BACKGROUND
The busbar covers have been removed to take the images. The covers were put back in place after the images were taken.

The Images are from a 2023 AU Spec Trialmaster Diesel, with the High Load Auxiliary Switch Panel option and front winch fitted. I have seen enough images to know the precise configuration in the busbars can vary.

Tip: always check your own vehicle. If in doubt, speak to the dealer or your auto electrician. None of the information has been verified by INEOS. I am not aware...

• TheDocAUS

• 

 

[LWA55DAL]

The aux switches have a separate fuse box and separate fuses for each one of the switches. You have to take the cover off to access the fuses serving the aux switches.

 

[rob88]

Lost power to aux high load switches ?

Added some Baja designs lights to 25amp factory location under hood. They worked for a few days and then lost power. Also lost power to most aux switches (winch, roof taps, under hood power taps)
I have checked all fuses that are related to that system and they are all good ? Any ideas ?

You likely tripped a main power module or a large high-amp fuse. Stop checking the small fuses. Find the big black fuse box under the hood, called the Integrated Power Module. Test the largest fuses in it for the aux system with a multimeter—they can look fine but be blown.
Also, disconnect your main battery for 15 minutes for a full reset. If power doesn't come back, the module may be locked out and need a dealer scan tool to reset.

 

[Rok_Dr]

You likely tripped a main power module or a large high-amp fuse. Stop checking the small fuses. Find the big black fuse box under the hood, called the Integrated Power Module. Test the largest fuses in it for the aux system with a multimeter—they can look fine but be blown.
Also, disconnect your main battery for 15 minutes for a full reset. If power doesn't come back, the module may be locked out and need a dealer scan tool to reset.

You'll find that the high amp pre-fuse busbars are under the rear passenger seat, not in the engine bay. To start with I would look at the 80amp z case battery fuse in position 4 on the 5 stud Accessories pre-fuse box.

Further details below:

Cheers
Steve