Auxiliary switches and light bar

Dmontoya21

Has anyone installed lights that require multiple wires for different functions (spot light/day time running lights). Every thing I have seen suggests there is just one wire in the windshield location but it seems easy to run a second down to the glovebox. Any tips would be appreciated.

If you are installing a windshield mounted light bar that requires multiple Aux switches, I would suggest that you run the entire wiring harness to the engine bay and not piece meal 1 connection at the windshield header and 2 others under the glove box.

It is not hard to get the wire into the vehicle via the Ford recommended location under the passenger side cover (requires you to drill a hole & be sure to seal with silicone). Once inside the vehicle run across the right side of the windshield and then down the passenger A pillar, behind the glove box, under the dash and out to the engine bay via the supplied grommet on the drivers side firewall. Connect to ground and applicable Aux switches and you are all set!

Be sure to protect the wires with some cable sleeve and use zip ties to secure it to avoid any chafing or movement.

It’s so nice to see thorough and thoughtful answers to questions. Thank you @Bschurr

Bschurr

If you are installing a windshield mounted light bar that requires multiple Aux switches, I would suggest that you run the entire wiring harness to the engine bay and not piece meal 1 connection at the windshield header and 2 others under the glove box.

It is not hard to get the wire into the vehicle via the Ford recommended location under the passenger side cover (requires you to drill a hole & be sure to seal with silicone). Once inside the vehicle run across the right side of the windshield and then down the passenger A pillar, behind the glove box, under the dash and out to the engine bay via the supplied grommet on the drivers side firewall. Connect to ground and applicable Aux switches and you are all set!

Be sure to protect the wires with some cable sleeve and use zip ties to secure it to avoid any chafing or movement.

This is really helpful. I didn’t realize the access through the firewall was behind the glove box but that makes a ton of sense. Any recommendations on wiring harness. I am installing 5 individual lights.

Dmontoya21

This is really helpful. I didn’t realize the access through the firewall was behind the glove box but that makes a ton of sense. Any recommendations on wiring harness. I am installing 5 individual lights.

Access through the firewall is NOT behind the glove box - it’s on the driver’s side up high under the dash (looks like a big nipple).

5 individual lights - do you want each light to have discrete on/off control or are you looking to control the 2 outside lights on 1 switch and the 3 centered lights on another? You will only need to wire 1 positive lead for each switch and you can use a common ground for all 5 lights regardless of how many switches are used. Total wires needed for 2 switches controlling 2 sets of lights = 3 (2 positive & 1 ground)

Hopefully this helps.

Bschurr

Access through the firewall is NOT behind the glove box - it’s on the driver’s side up high under the dash (looks like a big nipple).

5 individual lights - do you want each light to have discrete on/off control or are you looking to control the 2 outside lights on 1 switch and the 3 centered lights on another? You will only need to wire 1 positive lead for each switch and you can use a common ground for all 5 lights regardless of how many switches are used. Total wires needed for 2 switches controlling 2 sets of lights = 3 (2 positive & 1 ground)

Hopefully this helps.

Thanks again! The lights have spot and drl modes. I would like to control them on two separate aux switches.

Dmontoya21

Thanks again! The lights have spot and drl modes. I would like to control them on two separate aux switches.

Gotcha - and I just noticed the picture.

You only need 3 pigtail wires (this is your harness).
1- Ground (for all the black wires)
2 - Yellow for all the DRLs
3 - Red for all the SPOTS

Tie all 5 the yellow wires that provide power to the DRL together and connect the pigtail to the applicable Aux wire.

Tie all 5 of the red wires that provide power to the SPOTS together and connect the pigtail to the applicable Aux wire.

Tie all 5 of the ground wires adjacent to the yellow wires together and connect to a grounding point.

Tie all 5 of the ground wires adjacent to the red wires together and connect to a grounding point.

NB - all the ground wires can be grounded together and via a single pigtail.