Dr HaxZaw
New Member
Nut Cracker this is more for those wanting to use the standard holden switch for the headlights rather than installing a separate switch as that has been covered a million times on a million forums
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So it seems a few people out there have been asking how to wire up the foglights for the series 2 VY which doesnt have the loom. I did this about 18months ago so i dont have many of the photos but you should be able to do it all with what i have here.
What you'll need:
2 Foglights
New headlight switch with foglight function built in
1 Relay (i got this pretty cheap from holden and it has a nice diagram on it as to how it should be wired)
2 Male connectors to match up to the connections on the foglights (got these from repco as a whole connection but just used the male part)
15A wire (2 colours)
15A spade fuse and holder
5A wire (1 colour)
Connectors to connect wire to relay
Connector to fit on back of new switch
Solder and soldering iron
Heatshrink
BEFORE STARTING DISCONNECT THE BATTERY
Step 1: Remove headlight switch. I did this by prying it out with 2 screw drivers. It has to spring tabs holding it in which you are supposed to be able to reach from underneath to get it out but i couldnt get it to work and this method seemed ok.
Step 2: Remove harness from back of switch and check that you have a connector that will fit the little connectors on the back of the switch. Once you know it fits see how well it fits inside the plastic harness connector. Mine didnt so i used a 3mm drill to ease out the hole till it fitted.
Step 3: Connect 5A wire to connector and install into plastic holder and then connect to headlight switch. You may need to force the connector on separately depending on what size it is.
This photo shows where in the harness you need to connect it up to. Anywhere else and it wont work.
Step 4: Run 5A wire from switch through a grommet in the firewall through to where you are going to install the relay.
Step 5: Run 15A wire from the Positive of the battery. Install 15A spade fuse as close to the battery as possible. Run 15A wire to relay. Before relay splice in the 5A wire and run this to the Relay as well.
Step 6: Connect 15A and 5A wire to relay. Connect 5A wire from headlight switch to the opposite side of the relay as the 5A wire that feeds in. You should be able to see from the little diagram on the back of the relay as to how this should work.
Step 7: Remove front bumper and install foglights
Step 8: Run 2 15A wire down to the foglights. I ran mine down past the horn and then inside the front bumper support to get to the left hand side.
This is how i did it before rewiring. The wires dropped down in front of the radiator and looked terrible but i have rewired it inside the support they are taped to since then to make it neater.
Step 9: Connect 15A wires up to male connectors along with a 15A wire of a different colour. Make sure your wires match up (positive to positive, negative to negative) across the connection.
Step 10: Run the negative side of each foglight back up to the negative side of the battery. I think you can earth these wires but its a short distance and also thats how i wired them and never had any issues.
STEP 11: RECONNECT THE BATTERY AND ENSURE THE FOGLIGHTS ARE WORKING BEFORE RE-INSTALLING ANYTHING
Step 12: Re-install headlight switch and front bumper.
Here's a wiring diagram showing how the circuit should look for it to function properly
Any problems i'll do my best to help.