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What's the best/easiest place to tap into a 12 volt power source that is turned off/on by the ignition key?
I have a supplemental braking system add-on that requires a "switched power" source.
Not off the battery (no switch there) and not off the fuse block (no switch there either).
My guess is that I need to find a power wire to the heater fan, power windows or other device that requires the key be in the on/acc position.
Question is; where to tap into that power source?
Any suggestions?
What's the best/easiest place to tap into a 12 volt power source that is turned off/on by the ignition key?
I have a supplemental braking system add-on that requires a "switched power" source.
Not off the battery (no switch there) and not off the fuse block (no switch there either).
My guess is that I need to find a power wire to the heater fan, power windows or other device that requires the key be in the on/acc position.
Question is; where to tap into that power source?
Any suggestions?
Do you have the upfitter switches? That would be my first choice.
The upfitter switches are not appropriate. . .I need the system to be "ON" when the key is ON.
There are a bunch of "blunt cut" wires under the dash. I'm thinking something like the PTO wire - may I can tap into that. . .and hoping that someone has experience in that area.
Fuse 10, 10a, feeds a Customer access wire in the right hand kick panel. The wire is White with Blue stripe and it is taped to harness near connector C210 which is a 59 pin connector.
I don't remember the exact location but this gives you an idea, multi meter or test light can handle the rest..
I didn't have much luck with the passenger side fuse box down by the kick panel....Not enough room for a fuse tap so went under the hood and thru the firewall.
Fuse 10, 10a, feeds a Customer access wire in the right hand kick panel. The wire is White with Blue stripe and it is taped to harness near connector C210 which is a 59 pin connector.
The above info per 2015 Ford Service DVD
I had the right side kick panel off yesterday.
By "customer access" wires, I assume that it means "blunt cut" wires.
There are NO blunt cut wires under the right side kick panel.
I pulled the side panel, the glove box and the under dash cover - and inspected for blunt cut wires: none found.
I also pulled up the trim covers along the edge floor passenger side: no blunt cut wires.
I will re-inspect the taped harnesses under the right side kick panel today.
Okay Mike! Good information there.
Your 2011 fuse block fuse locations are different than mine.
(I don't have it memorized but I see some minor variations in fuse locations.)
I'll do some testing and try to find a switched fuse location today also.
Okay Mike! Good information there.
Your 2011 fuse block fuse locations are different than mine.
(I don't have it memorized but I see some minor variations in fuse locations.)
I'll do some testing and try to find a switched fuse location today also.
Very frustrating.
There is supposed to be a white/blue wire in the blunt cut bundle under drivers side dash.
It's even printed on the wire bundle tag as WH-BU RUN/ACC
But there is no white with blue stripe wire!
This would be the ideal place to tap into a "switch on" power source.
I've checked for power on several of the larger 18 gauge wires for power and no joy.
The only other thing I could think of would be tie into a constant hot, run it to a toggle switch, and make it switched by turning the toggle on/off.....kinda ghetto I know, but...
My guess is that maybe the driver's side blunt cut wires do not have fuses installed.
Ford could save a lot of money that way. I would have used one of the blunt cut wires if I knew which fuse slot worked for it.
Instead, I managed to install a fuse tap on the passenger side fuse block. (#33 Restraint control modual.)
There is just enough room next to the center relay. I had to cut an wire escape slot in the cover's side.
The cover will snap shut.
The fuse slot is hot only in the run position.
So. . .this will work but I wish that the blunt cut wires were of more use.
There should be a fuse for the PTO. . .but looking at the fuse block diagram, there's no PTO fuse. . .that seems kind of odd. Same for the RUN/ACC blunt cut wire. . . .there's no indication that it's fused. I'd like to do it proper but will have to forgo that for now.
Last edited by pacnorwest; Jun 21, 2015 at 05:34 PM.
Reason: grammer :)
My guess is that maybe the driver's side blunt cut wires do not have fuses installed.
Ford could save a lot of money that way. I would have used one of the blunt cut wires if I knew which fuse slot worked for it.
Instead, I managed to install a fuse tap on the passenger side fuse block. (#33 Restraint control modual.)
There is just enough room next to the center relay. I had to cut an wire escape slot in the cover's side.
The cover will snap shut.
The fuse slot is hot only in the run position.
So. . .this will work but I wish that the blunt cut wires were of more use.
There should be a fuse for the PTO. . .but looking at the fuse block diagram, there's no PTO fuse. . .that seems kind of odd. Same for the RUN/ACC blunt cut wire. . . .there's no indication that it's fused. I'd like to do it proper but will have to forgo that for now.
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