Tapping Headlight Power? - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 05-16-2014, 06:21 AM Thread Starter
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Tapping Headlight Power?

Posted this in the general discussion, but thought it might be more appropriate here....

I'm in the process of wiring up my pillar gauges and I'm looking for the positive headlight source wire to tie into for my dimmer function. It will dim the gauges when the headlights are turned on. Anyone point me in the right direction?

Also, as many people have done these gauges does anyone know off the top of their head which fuses or wires would be good to tap for my switched and constant power sources? I've looked at the diesel manor write-up and it's a great start just seeing some other opinions.

Brian - 2005 F250 CC SB King Ranch
35" Nitto's 20" American Racing Wheels
SCT tuned by Vivian, BPD EGR Delete, ARP Head Studs, OEM Gaskets, 4" MBRP Turbo Back Exhaust, Edge Insight, Zoodad Mod., Fog Light Mod., New Y-pipe, 08 tail lights, 08 Rear Diff Cover, Sinister coolant filter, Zerex ELC, Blue Spring

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post #2 of 6 Old 05-16-2014, 07:02 AM
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You tap the parking light wire.

Solid brown wire from the back of the headlight switch.

Make sure you only use the brown wire from the switch, not from the dimmer!

Denis "Lt. Sled"
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post #3 of 6 Old 05-16-2014, 07:10 AM Thread Starter
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got you...the bold type makes me feel like that's important

I was just thinking that the parking lights made more sense to tap than the headlights themselves. That's the route I'm going to take. Have any thoughts on those fuses as to which ones are good to tap for constant and switched power? If not looks like I'm breaking out the ol multimeter......

Brian - 2005 F250 CC SB King Ranch
35" Nitto's 20" American Racing Wheels
SCT tuned by Vivian, BPD EGR Delete, ARP Head Studs, OEM Gaskets, 4" MBRP Turbo Back Exhaust, Edge Insight, Zoodad Mod., Fog Light Mod., New Y-pipe, 08 tail lights, 08 Rear Diff Cover, Sinister coolant filter, Zerex ELC, Blue Spring

Future mods:
Guages
08 Rear Bumper and Tailgate
Possibly 08 Mirrors? Can't decide...
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post #4 of 6 Old 05-16-2014, 07:40 AM
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Quote:
Originally Posted by KingStroker View Post
Have any thoughts on those fuses as to which ones are good to tap for constant and switched power? If not looks like I'm breaking out the ol multimeter......
I can't help you there because I don't pull power from fuses, I solder to the main wire harness...

But on the side of the fuse box, there is a 12v power supply bolt...

And for the switched (ignition) wire you want to get the one from the steering column that supplies 12v while starting.

Not all of them do that.

Just use a test light to find the right wire, it will get 12v ignition and stay 12v while starting.

This way, your gauges don't freak out and do the starting sweep twice everytime you start your truck.

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

462hp / 927ft-lbs Corrected
ARP Head Studs, NUC Motorsports Oil Bypass, CFM+ Intake Elbow, Wicked Wheel 2
Bullet Proof Diesel FICM w/Atlas 40, SCT SF3 w/SPD by TSD! Grover Fire Truck Horns
Cab Light Mod, Blue Spring Mod, Zoodad Mod, High Idle Mod, Lost EGR Mod
LED Light Upgrades from Retro-Solutions 08-10 Side Mirrors from 1A Auto

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post #5 of 6 Old 05-16-2014, 07:52 AM Thread Starter
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Thanks dfuzz78 that's great advice right there. Where might that 12v power bolt be exactly?

Brian - 2005 F250 CC SB King Ranch
35" Nitto's 20" American Racing Wheels
SCT tuned by Vivian, BPD EGR Delete, ARP Head Studs, OEM Gaskets, 4" MBRP Turbo Back Exhaust, Edge Insight, Zoodad Mod., Fog Light Mod., New Y-pipe, 08 tail lights, 08 Rear Diff Cover, Sinister coolant filter, Zerex ELC, Blue Spring

Future mods:
Guages
08 Rear Bumper and Tailgate
Possibly 08 Mirrors? Can't decide...
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post #6 of 6 Old 05-16-2014, 08:16 AM
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Quote:
Originally Posted by KingStroker View Post
Thanks dfuzz78 that's great advice right there. Where might that 12v power bolt be exactly?
No problem.

Unbolt the whole fuse panel and pull it down, it's covered by a red plastic cover on the left side of the panel.

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

462hp / 927ft-lbs Corrected
ARP Head Studs, NUC Motorsports Oil Bypass, CFM+ Intake Elbow, Wicked Wheel 2
Bullet Proof Diesel FICM w/Atlas 40, SCT SF3 w/SPD by TSD! Grover Fire Truck Horns
Cab Light Mod, Blue Spring Mod, Zoodad Mod, High Idle Mod, Lost EGR Mod
LED Light Upgrades from Retro-Solutions 08-10 Side Mirrors from 1A Auto

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