Question about wires in Heater/Wiper/radio leg

[shark92651]

I've looking at this bundle of wires from the RF harness now and I want to make sure I understand where they go and how I could use some of them differently in my build since I don't have any plans for a radio or heater.

Purple Wiper wire - connect this to the wiper motor as per the Wiper motor instructions.

Red Courtesy Light - power lead to courtesy lights, activated when headlight switch is twisted all the way to the left
Lt Gray Courtesy Light - ground lead to courtesy lights

Brown Radio Power - I would like to use this to power my under-dash USB port

Red Radio Memory - This one is "hot at all times" right? If so I would like to use this to power my USB port inside the glove box

Brown Heater - I would like to run this one to the front to power my LED fog lights

Does anyone see anything wrong with my assumptions about how this wires are/can be used?

Thanks,
David


https://farm2.staticflickr.com/1965/45457679521_ee49c7c6d0_c.jpg

[cgundermann]

David ~

Never admit I’m an electrical wizard, but I believe the courtesy lights are activated by turning the headlight switch - not the wiper switch. I changed and used my radio power for my seat heaters and used a higher amp fuse. Something you want to check for is amp rating when powering different accessories then what was intended...I’m guessing the fuse’s amp rating for the heater would be sufficient for switching them to power your fog lights. I’m not sure if the ‘radio memory’ wire is a full twelve volts or just enough for a voltage trickle to keep the radio’s memory logged. I would test wire and charge/power something to check. Courtesy light ‘gray’ for ground, I’m not sure - because I didn’t wire mine, so hopefully someone will weigh in on that one specifically.

Chris

[Papa]

I used my radio power for my 12v power point and the heater wire for my seat heaters. I didn't run the courtesy lights in my car. If you have GPS gauges, you want an always hot connection to the speedo to allow it to acquire faster after startup. My unused wires in that bundle got clipped and capped with heat shrink tubing and then tied up for use down the road if needed.

[shark92651]

Yeah brain fart, meant headlight switch on the courtesy lights. I forgot about my seat heaters so I guess it makes sense to use the heater wire for those. The Coyote pigtail has a HAAT (hot at all times) wire and I was going to use that one for the Speedo. I will check the voltage on that radio memory wire, although I imagine it is 12V. I guess I will just run a new wire for the fog lights.

[Papa]

There are also a couple of wires in the EFI harness that you can repurpose.

[Boydster]

Purple Wiper wire - connect this to the wiper motor as per the Wiper motor instructions.
No issues.

Red Courtesy Light - power lead to courtesy lights, activated when headlight switch is twisted all the way to the left
Lt Gray Courtesy Light - ground lead to courtesy lights
Just an FYI... courtesy lights have power all the time. The on/off is controlled on the gray ground side at the headlight switch.

Brown Radio Power - I would like to use this to power my under-dash USB port
This is most likely OK as the USB charging will probably be pulling less amps than a radio.

Red Radio Memory - This one is "hot at all times" right? If so I would like to use this to power my USB port inside the glove box
Same here. Radio Memory is powered off the 15 amp Headlight switch fuse. Especially of you're using all LEDs for external lighting, this wont be an issue. Yes, HAAT.

Brown Heater - I would like to run this one to the front to power my LED fog lights
Heater is a 20 amp fuse. Should be fine for LED fog lights, depending on how powerful and how many amps they pull. Research the lights you want to use. Look for something listed like "power draw". Add together however many lights you will use. Dont let it get over 15 amps. I looked up some KC 32 watt LED fog lights and they draw less than 2 amps per light... with LEDs, the amp draw is so low, it's almost guaranteed that you'll be fine with this setup.

[shark92651]

Purple Wiper wire - connect this to the wiper motor as per the Wiper motor instructions.
No issues.

Red Courtesy Light - power lead to courtesy lights, activated when headlight switch is twisted all the way to the left
Lt Gray Courtesy Light - ground lead to courtesy lights
Just an FYI... courtesy lights have power all the time. The on/off is controlled on the gray ground side at the headlight switch.

Brown Radio Power - I would like to use this to power my under-dash USB port
This is most likely OK as the USB charging will probably be pulling less amps than a radio.

Red Radio Memory - This one is "hot at all times" right? If so I would like to use this to power my USB port inside the glove box
Same here. Radio Memory is powered off the 15 amp Headlight switch fuse. Especially of you're using all LEDs for external lighting, this wont be an issue. Yes, HAAT.

Brown Heater - I would like to run this one to the front to power my LED fog lights
Heater is a 20 amp fuse. Should be fine for LED fog lights, depending on how powerful and how many amps they pull. Research the lights you want to use. Look for something listed like "power draw". Add together however many lights you will use. Dont let it get over 15 amps. I looked up some KC 32 watt LED fog lights and they draw less than 2 amps per light... with LEDs, the amp draw is so low, it's almost guaranteed that you'll be fine with this setup.

Thanks this is very helpful