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Problem With Lights And Indicator


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#1 jamesR9

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Posted 09 January 2008 - 05:43 PM

Hi all.
I am having a problem with some of the electrics on my caravan.

1. The nearside front sidelight is not working. Other side is ok
2. The offside rear tail and indicator are not working. Nearside indicator ok and tail ok.
3. Number plate light not working.

Both brake lights work but not the sidelight on the offside.

I have checked all the bulbs and they are fine.
Does anyone have any idea what might be wrong?
Also, is there an earth lead, and where would it be?

Thanks
James

#2 MauriceH

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Posted 09 January 2008 - 06:32 PM

I dont know for sure but as all the bulbs are working it sounds like a plug / Socket fault.. (thats what mine was)

I am sure somone here (more techie than me) will sort it out PDQ

Maurice

#3 burstneraddict

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Posted 09 January 2008 - 06:57 PM

Maurice,

I have experienced this very problem some time ago. The solution that worked for me was to carefully clean all the pins and the sockets on the plug and socket. They were covered in dark coating, which I think was the result of my spraying WD40 on them at soem earlier point. Once they were all shiny, everything worked again.

Burstneraddict

#4 jamesR9

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Posted 09 January 2008 - 07:24 PM

Hi
Thanks for the replies.
I have actually changed the plug to no avail. I have tried a lighting board, and that works fine, so I know the problem isn't with the car. I'm at a loss as to what else to try.
James

#5 bspks

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Posted 09 January 2008 - 07:43 PM

The fact that the front nearside lights work and rear offside eliminates the plug as front and rear lights on each side share a common plug contact.
I would check for corrosion at the actual contacts in the lampholders.
I have had this on past vans and with care if the plug is in and the lights on the car on you can remove & insert the bulb and it may well come on albeit very briefly.
I have resorted (with the van unplugged) to using the blade of a screwdriver down the light socket to scrape corrosion off the contacts.
Also cleaning the contact points on the back of the bulb may help.
A check with a meter inside the lights to see if the 12V is actually present would be a good idea.
If there is no voltage you will probably find that there is a connector strip sometimes under a seat locker, sometimes under the van where the 7 core cable changes to individual cables to each light this is a likely spot to locate the problem.
Some older vans I have had dealings with, notably Swift, actually have internal individual blade type fuses in the van to protect the road lights, if fitted, some of these may have failed.

#6 angus

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Posted 09 January 2008 - 07:57 PM

Hi James, to follow on the details posted by bspks, there is quite likely a distribution block where the 7 core lead splits to go to the various lights. Our older Lunar and ABI fed through old-style ceramic fuses which were prone to corrosion, so find where the cable enters the van and go from there.
The number plate lights are invariably on the same feed as one of the sidelights, so you may have less problems than you think.
If you`ve checked all fuses,bulbs,holders with no success, depending on the age of the van you may have a problem with the wiring, which can over years corrode internally (the copper will turn black) which creates so much resistance you get insufficient current to light a bulb.

Good luck.

#7 AndyPoole

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Posted 10 January 2008 - 10:15 AM

Just a general point

WD-40 was developed as a “Water Displacement” product (See http://www.wd40.com/...wd40_faqs.html) and whilst it can be used as a electrical contact treatment it is not the best thing to use. The correct item is a proprietary Electrical Contact Cleaner / lubricant. This can be bought from Maplins Part No JP17T or RS Components Part No 132-542 or any other good Electrical Compoent supplier.

Andy

#8 ivan leslie

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Posted 10 January 2008 - 02:00 PM

Hi all.
I am having a problem with some of the electrics on my caravan.

1. The nearside front sidelight is not working. Other side is ok
2. The offside rear tail and indicator are not working. Nearside indicator ok and tail ok.
3. Number plate light not working.

Both brake lights work but not the sidelight on the offside.

I have checked all the bulbs and they are fine.
Does anyone have any idea what might be wrong?
Also, is there an earth lead, and where would it be?

Thanks
James

Hi James - I had similar problems but in addition a fuse in the car blew - this was caused by part of the caravan lighting wiring causing a "short" and the van was actually "live". had to take it to a specialist motor electrician to solve.
as you say your car is ok may not be the same issue but thought i would contribute. hope gets sorted.




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