Jump to content

Main beam keeps blowing fuses

Recommended Posts

Hey up peeps,

I've just finished banging my head on the Landy with this problem without success and so I thought I'd continue banging it on the forums to see if I could fair any better.

I've got a 300tdi Defender 90 which until this winter has been dream. But as we all know, we wake up from dreams and reality takes a swipe! She's developed an electrical fault. When I activate main beam, the fuse for NS blows. Initially I pulled over, replaced the fuse and all worked well again for 2 minutes, then it blew again. Replaced it, same issue. I have 100W spots separately switched and fused, so thought it might be the problem. Set out this morning to solve it as follows:

Switched off Aux spots - fuse still goes.

Disconnected Aux relay - fuse still goes.

Checked the main beam feed to the Aux relay - everything OK. - I've ruled out anything to do with the Aux spots.

Since checking this lot out, the fuse no longer waits a couple of minutes, it goes immediately, whether the beam stalk is pushed forward (on full time) or pulled back (flash).

I've disconnected the NS headlamp - fuse still goes.

Cleaned and checked connections to the headlamp - fuse still goes.

Checked connections to the column switch - everything seems in order - fuse still goes.

So, now I need a big bag of fuses and some help! Has anyone here experienced the same thing? My next stop is to replace the column switch and see what happens, I also read that there's an earth under the wing somewhere that might be dodgy, what do you think?

It may be co-incidence but I replaced the battery a few weeks ago when we had the big freeze and since then, the water temp gauge tells me she's running a fair bit hotter (even in -10 temperatures) and this light issue has sprung up. Does it fit or am I just looking for excuses here?

Thanks for your help people

Link to comment
Share on other sites

Right where to start if your main beam circuit is popping fuses as you say the it sounds like you have a dead short on the wiring between the switch and lamp not trying to insult your technical knowledge but by dead short I mean a power feed is earthing out ie a chaffed wire start by checking the wiring and plugs for any signs of corrosion or burning out or splits! As for the temp change I had this on my 90 all I did was clean all the main earths and put some vasaline over them once cleaned and replace.

Good luck I hope this helps all the best adrian

Link to comment
Share on other sites

Guys, thanks for the replies and don't worry about insulting any technical knowledge, after a few hours of fault finding I'm surprised I can even remember my own name, let alone a fault finding procedure.

These are all good pointers, I'll set about the old girl again with renewed enthusiasm and let you know.



Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy