Aux System problem

[Abol7ees]

Hi guys, i have an 2018 JLR that came with the AUX system from the factory, it was working fine until one day i discovered my spot lights are not working but the aux buttons lights normally. i dont know what the issue . i tried looking for fuses or relays but could not figure out the location of them,, anyone could help me in this issue.

Sponsored

 

[vavaroutsos]

Hi guys, i have an 2018 JLR that came with the AUX system from the factory, it was working fine until one day i discovered my spot lights are not working but the aux buttons lights normally. i dont know what the issue . i tried looking for fuses or relays but could not figure out the location of them,, anyone could help me in this issue.

Relays and fuses are in the PDC (power distribution center) for factory installed switches.

 

[Abol7ees]

Relays and fuses are in the PCM for factory installed switches.

so in that case i have to take it for the dealer to check it out ?

 

[GtX]

A different thread says they are in the fuse block under the hood.

 

[melendez69]

You don't necessarily have to take it to your dealer. I don't know if you're using all 4 switches, but if you have the level of expertise, move the wire for the non-functioning lights to a different AUX wire & test them. Also check the ground connection.

Your fuses are on the right side close to the windshield. Factory-installed AUX fuses are

F93 HD ACCY #1 — 40 Amp Green (Cartridge)
F92 HD ACCY #2 — 40 Amp Green (Cartridge)
F103 HD ACCY #3 — 15 Amp Blue (Micro)
F108 HD ACCY #4 — 15 Amp Blue (Micro)

 

[Abol7ees]

You don't necessarily have to take it to your dealer. I don't know if you're using all 4 switches, but if you have the level of expertise, move the wire for the non-functioning lights to a different AUX wire & test them. Also check the ground connection.

Your fuses are on the right side close to the windshield. Factory-installed AUX fuses are

F93 HD ACCY #1 — 40 Amp Green (Cartridge)
F92 HD ACCY #2 — 40 Amp Green (Cartridge)
F103 HD ACCY #3 — 15 Amp Blue (Micro)
F108 HD ACCY #4 — 15 Amp Blue (Micro)

thanx for the help but my fuse box is different from this diagram, i dont have F108 and F103 they are empty and it was still working..

 

[Abol7ees]

Plus all my switches are used and non of them work, thats why am thining its the relay or something other than the fuses

 

[Shots]

Yeah, definitely not a dealer tip if it's just a fuse. Very easy to replace them, and you can pick up a pack of replacement fuses at any auto parts store.
That said, you'll want to figure out what blew the fuse though, or you'll probably just end up blowing the new one too.
As for your current situation. I don't think it's a blown fuse, because I doubt the light on the Aux button would work of the fuse blew. I think you likely have a connection issue with the lights. The most likely scenario is that your ground connection has failed. I would check that first.

 

[Abol7ees]

Yeah, definitely not a dealer tip if it's just a fuse. Very easy to replace them, and you can pick up a pack of replacement fuses at any auto parts store.
That said, you'll want to figure out what blew the fuse though, or you'll probably just end up blowing the new one too.
As for your current situation. I don't think it's a blown fuse, because I doubt the light on the Aux button would work of the fuse blew. I think you likely have a connection issue with the lights. The most likely scenario is that your ground connection has failed. I would check that first.

i agree about the fuse issue, i will try to change the ground location and see how it goes .. thank you

 

[Shots]

No problem. FWIW, there is an excellent ground location pre-installed from the factory. It's on the passenger side, inside the engine compartment near the fuse box. There are 2 studs that work very well.

 

[vavaroutsos]

so in that case i have to take it for the dealer to check it out ?

Sorry, I used the wrong acronym, should have said PDC (power distribution center). It's under the hood by the firewall on the passenger side.

 

[vavaroutsos]

thanx for the help but my fuse box is different from this diagram, i dont have F108 and F103 they are empty and it was still working..

If you don't have these fuses you may have dealer installed aux switches. Check if these fuse locations have contacts in them. If not, you have dealer installed switches. For the dealer installed switches the fuses are in the wiring harness, which runs along the top of the firewall under the hood. The relays are in a small black box mounted to the firewall by the brake booster.

 

[Abol7ees]

If you don't have these fuses you may have dealer installed aux switches. Check if these fuse locations have contacts in them. If not, you have dealer installed switches. For the dealer installed switches the fuses are in the wiring harness, which runs along the top of the firewall under the hood. The relays are in a small black box mounted to the firewall by the brake booster.

I look over the brake booster but there is nothing there,

 

[Abol7ees]

No problem. FWIW, there is an excellent ground location pre-installed from the factory. It's on the passenger side, inside the engine compartment near the fuse box. There are 2 studs that work very well.

i checked my ground and it is good and the same place you have mentioned ...

 

[Abol7ees]

today i tried to follow the wiring to find a fuse or relay but i couldnt,i even check inside the car on the passenger side for fuse or relay but nothing ,, i looked were the brake boaster and nothing, change the ground and still nothing ,, this is getting me crazy . i dont think the dealer will put the fuses in a hiden place cuz it will be dumb of them .. i just have no clue what to do.

Sponsored