L19MUD Posted January 23 Share Posted January 23 I have an issue with a 1998 300 tdi 90 where the left hand sidelights fuse. if you turn the lighting switch to the first position the work fine, as soon as you move it to the second position (headlights on too) then the left hand side lights fuse. I can't see any connection other than the switch itself unless I am being dim (pardon the pun!)? Next step would be to strip that apart I guess Quote Link to comment Share on other sites More sharing options...
steve b Posted January 23 Share Posted January 23 The other common point is the earth connection to the inner wing ? If the wiring loom is not clipped up (or broken clips) it can chafe too Steve Quote Link to comment Share on other sites More sharing options...
L19MUD Posted January 23 Author Share Posted January 23 I think you could be right. Had a quick look whilst there tonight and could not get fuse to blow for sidelights. Interestingly though the left hand side front and back side lights won't come on but with the fuse out the dash lights go out Then put hazard lights on which immediately blew the fuse. A replacement fuse does not blow and the hazards and indicators don't work Quote Link to comment Share on other sites More sharing options...
L19MUD Posted January 23 Author Share Posted January 23 Am thinking the common point could actually be the main earth up on the bulkhead and things are finding different earth routes due to that bad earth Quote Link to comment Share on other sites More sharing options...
steve b Posted January 23 Share Posted January 23 That's possible and easy to get to That could explain the hazards too? Steve Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 23 Share Posted January 23 What’s the number of the fuse that blows? Quote Link to comment Share on other sites More sharing options...
L19MUD Posted January 23 Author Share Posted January 23 6 minutes ago, Peaklander said: What’s the number of the fuse Well now it's none of them but was the one for the left hand sidelights Quote Link to comment Share on other sites More sharing options...
monkie Posted January 24 Share Posted January 24 It could well be two separate problems. Sorting out the earths so I had an earth bus at each corner plus the dash going straight back to the battery via a nice thick wire was one of the best electrical upgrades I did to my 110. This is a wiring diagram (minus the earths) I made for the standard lighting circuit on my 1988 110 which might help you figure it out 1 Quote Link to comment Share on other sites More sharing options...
L19MUD Posted January 27 Author Share Posted January 27 The plot thickens. I pulled all the big maxi fuses in the engine bay and cleaned those. Disconnected the loom on the footwell of the bulkhead to the rear. Fuse in (turns out I had been checking fuse 16 not 15!) And fuse 15 for left hand sidelights blows so now I know it's front Removed wheel and left wheel arch to disconnect sidelights, indicator and headlight plus a relay from headlight main beam to some spotlights. Cleaned that lot up and put back together and the sidelights now work fine. At some point in the messing about I was getting an indicator light on one side with the hazard lights switch on. Now nothing I do results in any indicators or hazard lights. I have 12v power at fuse 1 with the hazard lights on and no power without Quote Link to comment Share on other sites More sharing options...
L19MUD Posted January 27 Author Share Posted January 27 Fuse 3 has 12v at all times with the ignition on. Am thinking the flasher relay or the hazard light switch should be my next action point? Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 27 Share Posted January 27 Are you following the circuit diagram? Fuse 1 is permanent live (from brown through fuse to purple) and feeds the hazard switch and the 10AS. I don't know how that can go to 0 volts without blowing the fuse. Fuse 3 is a key selected switched feed (white) and so should be on all the time that 'ignition' is selected. When you say "Cleaned that lot up and put back together and the sidelights now work fine.", what did you clean exactly? Edit: The Defender Electrical Library document has a good write-up for indicator and hazard circuit logic. Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 4 Share Posted February 4 Have you got anywhere with this problem @L19MUD? Quote Link to comment Share on other sites More sharing options...
L19MUD Posted February 5 Author Share Posted February 5 I managed to find some time to go to the workshop yesterday. I decided to try swapping out the Hazard switch and the flasher relay as quick simple things before I start testing through with the multimeter The answer was the flasher relay. Once changed everything was back to normal and working. I wish I started there! 2 Quote Link to comment Share on other sites More sharing options...
Peaklander Posted February 5 Share Posted February 5 Thanks for the update and it's good to hear it's fixed. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
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.