Tuesday, Mar 09, 2010 at 08:07
The other, and most likely scenario is that you have a high resistance joint somewhere in the van wiring. This could be a loose connector, poor connection or moisture surrounding a joint etc. All can cause high resistance and higher current draw and consequent voltage drop.
I have a similar problem with my van/LC200 but in this case it is, in part, the LC200 wiring.
My stop lights on the van will work with one or two pushes then stop...mmmm But using the brake controller lever, they work every time.?? What the... Now, I should tell you I am an electrical engineer (retired) but this problem has me tearing out what hair I have left.
In part, the reasons are that the brake controller has wiring going direct to the 12 pin plug...pin 6 to operate the stop lights. For the brake pedal, it's also pin 6 but Toyota connect to their original loom wiring to the stop lights on the truck and that wiring can't handle the load. The caravan stop lights are 12v, 21w X 4 plus a high level LED, so quite a load at 12v but...they used to work and now don't...??? I believe that I have developed a high resistance joint somewhere in the van which the heavier brake controller wiring can handle, but the Toyota wiring cannot. But do you think I can find the problem...?? I have all but rewired the van wiring and soldered joints but to no avail. By the way, the brakes work fine, they are connected via the barke controller to pin 5 on the 12 pin.
I am going to run a new, heavier guage wire from the Toyota battery via a relay operating off the Toyota tail lights and if that doesn't fix it you will read a story about a mad retiree who drove over
the gap....with his new Landcruiser and 24' van..!!!
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