Daytime Running Lights Switch

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Installing a DTRL Disconnect switch

First, locate the yellow wire coming out of the back of the headlight switch harness.  On my 1999 it is pin #15.  You can interrupt the wire here or connect at one of the locations noted below.  Removing the switch can be difficult.  There is a small spring loaded plastic lever on the top that must be slid to the right to release the catch.  I suggest finding the wire elsewhere to make the connections.

On later models the yellow wire goes to the hand brake disconnect relay.  You may find it in the middle of the dash behind the cup holder.  Look for a large relay with the number “94” on it.  Later models may have the number “206”.  The yellow wire connects here and comes out the other side yellow with a white stripe.  On models without the hand brake disconnect, the wire may travel all the way across the dash inside a piece of black tubing.  You may find the end of this harness under the dash on the passenger side.

The yellow wire comes out of the black tubing and loops back in on the way to the fuse panel.  This is how it was on my 1999.  If you can find this, cut the wire where it loops (it is looped around a tie wrap) and remove the harness from the tie wraps holding it in place.  Push the end of this harness through the hole in the dash where the switch will be located.  If you have the relay in the middle of the dash splice into the yellow/white wire.  This way the pilot light on the switch will only work when the DTRL’s are actually on.  It will turn off when the hand brake is set.  Using butt connectors splice in two pieces of 16 AWG wire about two feet long.  Route these wires up through the dash.

If you choose to install a switch with a pilot light you will need a ground.  Crimp on a eyelet connector on one end of a three foot piece of 16 AWG wire and screw to the metal angle on the floor (photo 1).  Run this wire up to the switch location with the other wires.

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Once you have pulled your wires, cut out the center of one of the filler plates in the dash to accept the switch (photo 2).  I was able to use a sharp utility knife and remove a little at a time.  Test fit the switch when you get close.


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I used a Cole Hersee switch purchased from West Marine. Cole Hersee #58328-001BP, West Marine #147939, cost $10.99.  It comes with several different color snap in lenses for the pilot light.


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Photo 3 is the back of this switch.  Connect the ground wire to the top terminal, connect the 12 volt supply coming from the headlight switch or relay (use a test light or volt meter to confirm) to the middle terminal and connect the load to the bottom terminal.  I chose to add an inline fuse (15 amp) to the supply wire where it connects to the switch.  This is because my first attempt to install a switch melted the wire harness ($40 replacement at a wrecking yard).  The first switch I used was a cheap brand from an auto supply store that shorted the load wire to the headlights to ground when the switch was turned off.  When I turned on the headlights when the rocker switch was off this caused a direct short to ground.  Very smelly mess.  This should not happen with the Cole Hersee switch.

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As you can see in the final photo #4, I have removed the rear defrost switch and pushed the connector inside the dash.  This switch no longer controls the rear window defrost, but it does control the mirror and windshild washer heaters, so you may want to leave it in place.  You can purchase another filler piece from VW, but they run about $17.

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Additional Modifications:

[ Arm Rest Removal ] [ Automatic Transfer Switch ] [ Awning ] [ Bathroom Shelf & Basin ] [ Battery Disconnect ]
[ Belly-Pan Cutout ] [ Bicycle Rack ] [ Cabinet Storage ] [ CB Radios ] [ Center Console ]
[ Closet Shelf ] [ Coach Door Seals ] [ Coach Entry Floor ] [ Computer Table ] [ Convex Door Mirror ]
[ Curtain Track ] [ Door Catch ] [ Daylight Running Lights ] [ DVD Conversion ] [ Entertainment Center ]
[ Entry Handrail ] [ Exterior Power Inlet ] [ Exterior Shower Drain ] [ Fuel Pump Jumpers ] [ Furnace Vent ]
[ Galley Faucet ] [ Generator Fuel Cutoff ] [ Granite Countertop ] [ Headboard ] [ Jack Handle Storage ]
[ LCD TV Conversion ] [ LED Bulbs ] [ Magnum Shooters ] [ Map Box ] [ Microwave Convection Oven ]
[ Propane Detector ] [ QD-H Conversion ] [ Rear Axle Stiffener ] [ Rear Couch Foam Roll ] [ Heat Control Label ]
[ Rear Seat Kick Panels ] [ Refrigerator DC Mode ] [ Refrigerator Conversion ] [ Roof Air 13,500 ] [ Roof Rack ]
[ Satellite Dish ] [ Sewer Dump Valve ] [ Sewer Hose Storage ] [ Shade Standoffs ] [ Shower Faucets ]
[ Shower Filter ] [ Simple Shoreline Conversion ] [ Skylight Panel ] [ Spare Tire Carrier ] [ Super Freezer ]
[ Throttle Body Cleaning ] [ Transmission Dip Stick ] [ Trunk Handle ] [ Wheel Covers ]  

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Page Updated: 14 October 2018