STOP WORKING AND WONT COME BACK ON

It's got to be another connector or fuse someplace. The OBD II connector does supply power to the reader and one of the very likely sources of failure is the fuse for that power. My GF's GMC Yukon XL OBD II connector didn't work and it turned out that the power was on the same fuse as...the cigarette lighter. She knew her son-in-law had caused the lighter to stop working but it never occurred to her that there would be any side effects.

You should be able to find the wiring diagrams online or get a copy from the dealer (especially since he cannot find the problem) and trace back from the OBD II connector to the fuse and power source to identify the fuse in question. Of course, if it appears good, check it with a meter--they can blow in spots you can't see.

Good luck!

Plug it into another wall socket, try it there. Then turn off all lights in room and plug it in, see if you can see any glow or LED inside it or outside. Then check the fuse in the plug if there is one.

Firstly, the main wires from the KDC-128 you need to check are:

RED - this should be connected to the vehicle's +12v IGNITION wire.
YELLOW - this should be connected to the vehicle's =12v BATTERY wire.
EARTH - i) some tuners will only earth when the tuner itself, is screwed into the vehicle's chassis (i.e. a metal mounting bracket); ii) some tuners require the BLACK wire to be attached to the vehicle's chassis (i.e. a metal mounting bracket).

Secondly, if the above wires are connected correctly, then you should suspect the fuse on rear of the tuner has blown (even if it LOOKS ok). Replace and see what happens.

Thirdly, if all above are ok, then you have a short somewhere on the vehicle.

hi...
there is a relay which connects turn indicator and the emergency flashers which is provided for the timing of the flash.this timer relay may got burnt or damaged. even though the fuses are OK the turn indicators wont work. please check this.

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there is a main fuse but check the door switch first,unplug remove the back the main fuse is to your left long and white check it with your meter-mike

It doesn't work at all If your washer doesn't seem to work at all, check these: No power Lid switch No power Check to see whether power is getting to the washing machine. Is it plugged in? Has a fuse blown or is a circuit breaker tripped? Lid switch If the lid switch is defective, your washer can't spin and may not function at all. The switch is inside the washing machine main housing near the door frame. Often you have to raise or open the top or front of the washer to get to the switch. If it's defective, you need to replace it. Some machines have a special lid-switch fuse near the lid switch, inside the control panel. If this fuse blows, the unit won't fill with water until you replace the fuse.

make sure you get 230 volts at light connection or 115 if your in america. if yes check internal wiring. if all connections look good go to switch on wall where its switched on. check is there power on common side of switch. if yes then switch it on and check is there power on load side of switch. (L1). if no then switch is broke. replace switch.

is it a seperate fuse ??
if its not the fuse check that the wires are connected ok!
Is there power at the switch ??

replace the fuses and check all the wire connections unter the dash by the pedals and under the hood if that doesnt work get your computer checked

There is a built in system of valves on the filter connections that enable changing filters without turning off the water. IF the filters are not fully connected the valves wont open and there wont be any water flow. .