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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Fri May 27, 2022 14:18 Post subject: Brake amd tail light not working together |
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Bit of a puzzler.Brake light works .Tail ligjht works.But brake and tail together theres nothing.But theres still voltage to the unit.Im baffled.
I'd be grateful for anybodies thoughts ? Thanks in advance. |
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Posted: Fri May 27, 2022 14:18 Post subject: Google Ads keep this community free to join! |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Fri May 27, 2022 16:15 Post subject: |
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In my experience dodgy tail light activity is usually traced to a poor earth connection. Could be something more complicated of course but I'd check the earths first. _________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Fri May 27, 2022 16:55 Post subject: |
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Thanks mate that what I'm thinking especially as theres voltage where there should be.The earth seems the likely culprit.I'll have another play over the weekend |
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MikeJak **
Joined: 28 Mar 2022 Posts: 118 Location: Herts
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Posted: Fri May 27, 2022 22:02 Post subject: |
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I had the same issue on my 90 when I bought it, found that the earth wire was cut from rubbing. I think it made enough contact from either filament but not enough for both filaments in the bulb to work at the same time.
I ended up changing both light units with some from e bay. A bit plasticky but have been solid, 18£ each. They are much brighter then the (aged) original units. |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Sat May 28, 2022 0:12 Post subject: |
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Thanks Mike.I 'll let you know when I've addend a new earth. |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Sun May 29, 2022 16:56 Post subject: |
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And sadly my new earth wasn't a succes.Maybe time for auto electrician |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Mon May 30, 2022 7:16 Post subject: |
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The only other thing I can think of is a corroded bulb holder, I had this problem on a trailer recently where the bulb holder just wouldn't make a decent contact with the bulb casing. If you've got 12v at the relevant contacts and a decent earth it should work. I use a test lamp (an old headlamp bulb with a couple of flyleads on it) for testing this sort of stuff rather than a multimeter as the meter often says there's 12 volts as it only needs a few milliamps but when you put a load on it with the test lamp drawing 4 amps or so there's not enough to light the bulb due to a poor connection or bad earth. I guess you've tried a couple of different bulbs just in case. _________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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diggerdave ****
Joined: 03 Oct 2014 Posts: 448 Location: Bubwith
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Posted: Mon May 30, 2022 10:54 Post subject: |
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Very common for the rear bumper units to fail. They're in a very vulnerable position and all th eroad dirt gets thrown straight at them. Replace both units is the simplest solution. _________________ 1997 KZJ90 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 217k hard miles |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Mon May 30, 2022 19:14 Post subject: |
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Its a new unit because the old one was rotten.I've got a few ideas to try yet but it will be later in the week now.Thanks very much for all your suggestions |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Tue May 31, 2022 8:56 Post subject: |
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I'm sure I've read somewhere that some non-OEM units are wired incorrectly out of the box but you'll probably tell us that you bought a Toyota one. _________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Tue May 31, 2022 15:58 Post subject: |
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Nope I bought an aftermarket one.More investigation needed I think.Can you remember where you read that? |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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locodriver65 ****
Joined: 19 Apr 2009 Posts: 324 Location: WEST MIDLANDS UK
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Posted: Wed Jun 01, 2022 20:41 Post subject: reply |
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Hi Guys
On my LC I had the same problem with mud etc in the wiring.
I removed the rear bumper repaired the lights and wiring, then made up two aluminium boxes to cover them so the weather and mud is kept out. That was done about 10 years ago.
No problems since.
Regards
Paul |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Tue Jun 07, 2022 16:46 Post subject: |
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Thanks all for the help.I've just received a replacement unit from Milners as they think the first unit may be incorrectly wired.I shall try the replacement and update.Thanks again. |
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Phil4108 *
Joined: 03 Mar 2022 Posts: 17 Location: Uk
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Posted: Mon Jun 13, 2022 14:53 Post subject: |
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And after all that.......it was a bad earth.Thanks for all youre suggestions : |
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