The Toyota Landcruiser Owners Club

diggerdave · **** Joined: 03 Oct 2014 Posts: 333 Location: York

Not specific to this problem, but just general comment (from a non-electrician). Lots of 'odd' electrical problems can be due to bad earth connections, usually corroded attachment points which are probably going to become more common as our trucks get older. The earth from the negative pole of my battery to the body was in a poor condition.
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1997 KZJ90 (narrowbody) 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 206k miles

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MisterCruiser · ** Joined: 07 Oct 2013 Posts: 104 Location: Ireland

I've just encountered the same problem on y 97 Colorado, got up the other morning and both headlights were on, stalk was in its proper "off" position and no keys in ignition. It had been raining and I suspect moisture got in somewhere. I disconnected the battery negative to troubleshoot it later as had to go to work (have another work car). Anyway, I connected the battery back up last night and the lights were off as normal. Then today, the same thing happened again, headlights came on by themselves with no key in ignition and stalk in its off position.

The tail lights don't be on, it's just the front headlights. Whilst they were on today, I pulled each of the 2 headlight fuses under the bonnet and the respective left / right headlight went out. I didn't think to pull the relay, but I pulled it later when the problem wasn't present and it looks ok, I didn't open it, but the terminal contacts on it appear fine and the fuse box itself isn't wet or showing evidence of moisture.

I tried wriggling random wires and wire looms, etc, to see if the headlights would turn on but they didn't.

Where is the earth point connection for the headlights, is it an actual earth cable bolted to somewhere in the engine bay?

There's 3 of us in this thread with the same problem so hopefully we'll figure it out between us Smile

DaveWall · Posted: Wed Feb 13, 2019 6:04 Post subject:

Has anyone with this problem disconnected light stalk on the steering column while the lights are on? at least you'll narrow the short to earth down to before or after the stalk... (or within the stalk itself I guess)....