Question about 2002 Chevrolet TrailBlazer

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Wiring harness diagram

We need to find out exactly which wires do what in a standard round wiring plug for towing a camper. I am trying to find a diagram showing which is the tail light, brake light etc. Help!! :)

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  • Anonymous Mar 26, 2014

    I need wire diagram for connecting back up alarm for a 98 k3500

  • Anonymous Mar 28, 2014

    i would like to wire up the towing lights to my lights on the landrover 90 1988 could i have a diagram or what colour goes where cheers



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Your question is not clear, 2002 trailblazer has a towing harness, in order to find each wire, use a ohmmeter and try out each application.

In case of male harness of a camper you can test it with 12 volts in each wire looking which light is on and if it is different position cut wires and make similar wiring

Posted on Nov 19, 2008

  • Ray mohler Mar 24, 2015

    I have a 1968 smoke camper I'm puting new tail light on I have the old wires all reedy there would like to use them there very good shape this thing has ele brakes on it don't no where wires go help



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Have 2008 nissan frontier when hooking to camper brakes and turn dont work checked back same/ is there fuse in front

There are a number of different methods of wiring a vehicle for towing depending on what is required.

Your vehicle probably uses a CAN-bus system and great care must be used when wiring for towing unless a genuine Nissan wiring harness is used. What fuses used and where they might be is something I am unable to comment about.

Wiring for towing and the wiring and lighting of trailers, campers, caravans are notoriously unreliable and short-lived unless completed to a very high standard and superior materials are used. When there is a fault it could be caused by either and it is important to suspect both and test both independently.

The first step should be to eliminate the camper, trailer or caravan as a possible cause by either plugging it in to another vehicle or using a substitution or testing box or device.
I have such a box that is invaluable to people who tow. It allows me to test the vehicle wiring and the trailer wiring.

Alternatively you could try plugging a known good trailer onto your vehicle for test purposes. It it is decided the vehicle is at fault it usually pays to examine the inside of the socket first to check for corrosion. I recently encountered a socket that was full of water and so badly corroded a couple of feet of the wiring had to be replaced. - and it had happened in only a year...

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