Question about 2004 Toyota Tundra
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Posted on Jan 02, 2017
SOURCE: Can you tell me if
Any trailer tow package vehicle should have at least the light wires.On a truck of that size it probably didn't come with a seven pin plug but it should have a four pin for lights. Hope this helps...Dan
Posted on Jul 31, 2008
Hey Paul, it's most likely a wiring problem. There is one wire designated for just the running lights. What type of plug does the truck have? Probably 6 or 7 way (6 or 7 wire). You can check the plug-in at the truck with a multi-meter to see if there's power at that point. If there is, then the problem is somewhere from the trailer plug to the lights on the trailer. If you have a 7 way plug, the center plug is for aux. power (back up lights on what you pull, if equipped). One wire is power to the camper battery for a breakaway switch, one for left turn and stop, one for right turn and stop, a ground wire, one for running lights, and one for trailer brakes. To determine what wire does what, 1st with meter check volts of all wires w/ truck and trailer hooked up, truck running, power wire to battery for breakaway should show voltage if equipped w/ a trickle charge, brake wire will show low voltage, approx. 2 volts, apply brakes and should go up to approx. 12 volts, put on L turn signal, meter should go up and down, as power to blinker pulses on and off, do the same to determine which is the R turn signal (put foot on truck brakes will show voltage to brake lights AND brakes, continue w/ process of elimination to determine which is running lights, and exactly where power is not going.
Posted on Apr 19, 2009
If you have amber signal lights & red brake lights, it's 2 separate circuits. You'll need to buy a small converter that you wire into harness to correct that. Not expensive, try autoparts store or RV/trailer sales, should have them.
Posted on May 08, 2009
I belive it would be the wire that actually sends the control signal to the controller?...correct? well the if so you would need to tap into the wire casing with a test light to see which wire is lighting the test light when the brake pedal is depressed good luck
Posted on Sep 11, 2009
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