The 75 and ZT Owners Club Forums
Page 1 of 2 1 2
Show 150 post(s) from this thread on one page

The 75 and ZT Owners Club Forums (https://www.the75andztclub.co.uk/forum/index.php)
-   Technical Help Forum (https://www.the75andztclub.co.uk/forum/forumdisplay.php?f=11)
-   -   Side Light Fault (https://www.the75andztclub.co.uk/forum/showthread.php?t=302321)

planenut 22nd January 2020 16:53
Side Light Fault
 
Sorry all, this is a bit lower league, my nearside front side light appeared not to be working and the fault was highlighted by the fault light on the dash.

Eventually, I got the bulb out though it looked okay, and I replaced it with a new bulb, this did not work either. It's one bulb, so I wasn't looking for a fuse fault.

Tried both the bulbs linked but out of the socket, but neither would illuminate. The terminals are clean and not corroded.

I realize that this will lead to the bumper coming off, but are there any suggestions as to the route of the wiring please and possible connections?

T-Cut 22nd January 2020 18:49
Quote:
Originally Posted by planenut (Post 2788333)
I realize that this will lead to the bumper coming off, but are there any suggestions as to the route of the wiring please and possible connections?
Bumper off is the only way to verify whether it's due to the common problem of harness chafing.
A severe case:
https://www.mediafire.com/convkey/c1...go872o156g.jpg

The nearside harness crosses the sharp welded seam. Vibration does the rest.

This typically causes issues with the nearside headlamp system. The hot spot is forward of the screen wash reservoir.

TC

planenut 24th January 2020 16:11
:flog: sadly, having taken the bumper surround off, so that I could check the wiring; taken out the air filter and hoses, I could not find any chafing (that's not a swear word, though I was using them) evidence. Due to the wiring differential, I might as well be colourblind.

The internal wires to the bulb are only red and black. The wiring coming in to the multiplug is of many colour combinations. Logically, those coming in serve different purposes.

All fuses and relays in the engine bay fuse box are okay, though I never imagined that one would only serve one light bulb.

I really cannot imagine a dodgy wire being anywhere but from the light unit to the loom. The wiriing diagrams that i've found vary, and don't exactly let me pin down one wire.

Covered it all up and will have another go tomorrow.

clf 24th January 2020 16:41
Quote:
Originally Posted by planenut (Post 2788754)
:flog: sadly, having taken the bumper surround off, so that I could check the wiring; taken out the air filter and hoses, I could not find any chafing (that's not a swear word, though I was using them) evidence. Due to the wiring differential, I might as well be colourblind.



The internal wires to the bulb are only red and black. The wiring coming in to the multiplug is of many colour combinations. Logically, those coming in serve different purposes.



All fuses and relays in the engine bay fuse box are okay, though I never imagined that one would only serve one light bulb.



I really cannot imagine a dodgy wire being anywhere but from the light unit to the loom. The wiriing diagrams that i've found vary, and don't exactly let me pin down one wire.



Covered it all up and will have another go tomorrow.
The damaged wiring pictured above was actually hidden below the headlamp, only being apparent when the lamp unit was removed.

Sent from my SM-A600FN using Tapatalk

planenut 24th January 2020 16:55
Quote:
Originally Posted by clf (Post 2788756)
The damaged wiring pictured above was actually hidden below the headlamp, only being apparent when the lamp unit was removed.

Sent from my SM-A600FN using Tapatalk
Thanks, the wiring comes in from the loom to a multiplug fitted behind the headlight unit. The wiring that drops below on mine goes to fog lights.

I will keep searching, but am having trouble with diagrams.

suzublu 24th January 2020 17:31
Quote:
Originally Posted by planenut (Post 2788763)
Thanks, the wiring comes in from the loom to a multiplug fitted behind the headlight unit. The wiring that drops below on mine goes to fog lights.

I will keep searching, but am having trouble with diagrams.
Fred, it may be stating the obvious, but have you checked the bulb for a break in the little wire connector?

planenut 24th January 2020 17:35
Quote:
Originally Posted by suzublu (Post 2788768)
Fred, it may be stating the obvious, but have you checked the bulb for a break in the little wire connector?
Thanks, yes, I was hopeful again that it was both bulbs but no, they're fine.

T-Cut 24th January 2020 18:02
Quote:
Originally Posted by planenut (Post 2788754)
sadly, having taken the bumper surround off, so that I could check the wiring; taken out the air filter and hoses, I could not find any chafing
That's the nearside wing area. Have you checked the harness by the screenwash reservoir?


TC

COLVERT 24th January 2020 20:09
1 Attachment(s)
Quote:
Originally Posted by planenut (Post 2788770)
Thanks, yes, I was hopeful again that it was both bulbs but no, they're fine.
My car had a similar problem quite a few years ago now. It turned out to be slightly corroded connectors in the plug on the light switch module.

Easy to get out and check. I sprayed the pins in the socket with WD 40 and it's worked perfectly ever since.---

planenut 24th January 2020 22:18
Quote:
Originally Posted by COLVERT (Post 2788816)
My car had a similar problem quite a few years ago now. It turned out to be slightly corroded connectors in the plug on the light switch module.

Easy to get out and check. I sprayed the pins in the socket with WD 40 and it's worked perfectly ever since.---
Thanks, I'll check that out tomorrow. I hadn't been to the switch yet.


All times are GMT. The time now is 08:19.
Page 1 of 2 1 2
Show 150 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd