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ALDeer Automotive Electrical Experts #2050006
03/07/17 10:40 AM
03/07/17 10:40 AM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL
Shirley there are a few here...or at least some that stayed in a Holiday Inn last night...

Here's what I want to do:

I want to wire up some small LED lights under my rear bumper, but I want them wired a certain way...I basically want them on a 2-way switch where:

Position A = they automatically come on when the vehicle is shifted into reverse, and
Position B = manually turned on.

The reason being, I want them to always come on when reversing, but I want the option to turn them on even if the vehicle is in Park (like hooking up a trailer or something).

I called Truck Supply & Outfitters in Tuscaloosa a few years ago and they acted like this was simply not possible, so I gave up. But now that I've got a fancy new ride, I'd like to revisit it.

Surely it can't be that difficult.

Thoughts?


There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050008
03/07/17 10:41 AM
03/07/17 10:41 AM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL
Actually a 3-position switch would be even better, where there could be an option to have them totally OFF, but if the ON/Reverse way would be easier, I'd be fine with that.

Last edited by GomerPyle; 03/07/17 10:44 AM.

There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050029
03/07/17 10:53 AM
03/07/17 10:53 AM
Joined: May 2012
Posts: 12,481
Pike County, AL
Fuzzy_Bunny Offline
Booner
Fuzzy_Bunny  Offline
Booner
Joined: May 2012
Posts: 12,481
Pike County, AL
All you need is a 12 volt relay which is available at any part store for $10 or less. Tie the coil + from the relat to the factory back up light wire. Tap into the same wire and run it to a switch on the dash.

Fuses and such will be required, and i can provide a better curcuit description later. But the project is very easy.

Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050033
03/07/17 10:55 AM
03/07/17 10:55 AM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL
That's what I thought....Just tap into the reverse light wire for power and then when the switch is flipped, have it hard-wired. I figured it had to be relatively simple. can't figure out why they acted like it was so difficult.


There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050040
03/07/17 10:59 AM
03/07/17 10:59 AM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
14 point
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
Actually You only need a couple of diodes and a switch. Simple. Actually would be better because it would keep the 12v from feeding back into the circuit for the backup lights. These new vehicles you don't know what that might do. You could do Fuzzy Bunny's way but I'd still put a diode in the wire to the backup lights.

Last edited by trlrdrdave; 03/07/17 11:06 AM.

"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050066
03/07/17 11:22 AM
03/07/17 11:22 AM
Joined: Dec 2006
Posts: 1,245
Calera
Guru Offline
8 point
Guru  Offline
8 point
Joined: Dec 2006
Posts: 1,245
Calera
Somthin' like this...

Schematic


Light travels faster than sound. This is why some people
appear bright until you hear them speak.
Re: ALDeer Automotive Electrical Experts [Re: Guru] #2050102
03/07/17 11:47 AM
03/07/17 11:47 AM
Joined: Jun 2014
Posts: 3,434
Sumter County
sumpter_al Offline
10 point
sumpter_al  Offline
10 point
Joined: Jun 2014
Posts: 3,434
Sumter County

Originally Posted By: Guru
Somthin' like this...

Schematic


I like the avitar of the guy you linked too.


I love my country, but don't trust my government.
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050966
03/08/17 04:07 AM
03/08/17 04:07 AM
Joined: Oct 2008
Posts: 30,910
Clanton, AL
Out back Offline
Grumpy Old Man
Out back  Offline
Grumpy Old Man
Joined: Oct 2008
Posts: 30,910
Clanton, AL
I could do it for you, but explaining step by step would take a while


My opinions and comments are my own. They do not reflect the position or political opinions of Aldeer or any of the Aldeer administration.
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050967
03/08/17 04:09 AM
03/08/17 04:09 AM
Joined: Oct 2008
Posts: 30,910
Clanton, AL
Out back Offline
Grumpy Old Man
Out back  Offline
Grumpy Old Man
Joined: Oct 2008
Posts: 30,910
Clanton, AL
What I would do (instead) is buy 4 LED lights. Connect 2 of them to the reverse switch and put the other 2 on a toggle switch.


My opinions and comments are my own. They do not reflect the position or political opinions of Aldeer or any of the Aldeer administration.
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050980
03/08/17 04:20 AM
03/08/17 04:20 AM
Joined: Oct 2002
Posts: 18,070
Andalusia, Al. Covington Co.
DEADorALIVE Offline
Old Mossy Horns
DEADorALIVE  Offline
Old Mossy Horns
Joined: Oct 2002
Posts: 18,070
Andalusia, Al. Covington Co.
I have 2 7" LED lightbars mounted under the bumper of my truck as aux. backup lights. They're wired into the reverse light circuit of the towing harness. My Dad suggested that we add a switch and wire them exactly like GomerPyle said, but I told him that that was a terrible idea, as I'd abuse it first and every chance I got! laugh


Well behaved women never make history.~ Out back
Quit laughing...I think I broke something.

Fifteen is my limit on Schnitzen-Gruben, Baby...

I have OCD and ADD, so everything has to be perfect, but only for a minute.
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050982
03/08/17 04:21 AM
03/08/17 04:21 AM
Joined: Nov 2013
Posts: 10,251
coffee county
goodman_hunter Offline
Booner
goodman_hunter  Offline
Booner
Joined: Nov 2013
Posts: 10,251
coffee county
the only problem i see is, if you tap into the power wire for reverse light. Doesnt it only get power when it is in reverse?

I just added 2 lights and a switch, i also added to light to the circuit for reverse lights. Basically like someone said above.


For without victory, there is no survival
Re: ALDeer Automotive Electrical Experts [Re: DEADorALIVE] #2050983
03/08/17 04:21 AM
03/08/17 04:21 AM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL
Originally Posted By: DEADorALIVE
I have 2 7" LED lightbars mounted under the bumper of my truck as aux. backup lights. They're wired into the reverse light circuit of the towing harness. My Dad suggested that we add a switch and wire them exactly like GomerPyle said, but I told him that that was a terrible idea, as I'd abuse it first and every chance I got! laugh


My old truck had a pretty bright tractor light from the Co-Op mounted under the back bumper, just on a manual switch. People that tailgated me didn't do it for long.


There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2050987
03/08/17 04:25 AM
03/08/17 04:25 AM
Joined: Apr 2007
Posts: 13,690
Over yonder
E
extreme heights hunter Offline
Booner
extreme heights hunter  Offline
Booner
E
Joined: Apr 2007
Posts: 13,690
Over yonder
Originally Posted By: GomerPyle
Shirley there are a few here...or at least some that stayed in a Holiday Inn last night...

Here's what I want to do:

I want to wire up some small LED lights under my rear bumper, but I want them wired a certain way...I basically want them on a 2-way switch where:

Position A = they automatically come on when the vehicle is shifted into reverse, and
Position B = manually turned on.

The reason being, I want them to always come on when reversing, but I want the option to turn them on even if the vehicle is in Park (like hooking up a trailer or something).

I called Truck Supply & Outfitters in Tuscaloosa a few years ago and they acted like this was simply not possible, so I gave up. But now that I've got a fancy new ride, I'd like to revisit it.

Surely it can't be that difficult.

Thoughts?


I`ve had a lightbar sitting on the shelf in my garage for this very reason for over a year. hopefully you can get this figured out and as soon as I find me another truck, you can walk me thru it.

Re: ALDeer Automotive Electrical Experts [Re: goodman_hunter] #2050995
03/08/17 04:27 AM
03/08/17 04:27 AM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Offline
14 point
odocoileus  Offline
14 point
Joined: Oct 2008
Posts: 6,717
Selma
Originally Posted By: goodman_hunter
the only problem i see is, if you tap into the power wire for reverse light. Doesnt it only get power when it is in reverse?

I just added 2 lights and a switch, i also added to light to the circuit for reverse lights. Basically like someone said above.


No, the reverse lights only powers the coil on the relay to have power sent to the auxillary back up lights. As stated, likely need to place a diode to keep current from back flowing if you want a anytime on off switch too. I drew a diagram somewhere for this with a on/off/on switch, I'll see if I can find it.

Last edited by odocoileus; 03/08/17 04:29 AM.
Re: ALDeer Automotive Electrical Experts [Re: GomerPyle] #2051029
03/08/17 04:57 AM
03/08/17 04:57 AM
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
trlrdrdave Offline
14 point
trlrdrdave  Offline
14 point
Joined: Sep 2007
Posts: 7,561
Hartselle, AL
Yall making this too hard. Just put a diode in the wire from the back-up lights and one from the switch pointed at the LEDs. You want the end of the diode with the stripe on it next to the LEDs. Diodes should be rated above the current for the LEDs too. Really you could just get by with the one between the backup lights and the LEDs. Now if you had something with higher current or LEDs that drew more than 4 or 5 amps you would need a relay and a diode. If it was an older vehicle I wouldn't worry about feeding back on the back up lights and not using a diode. But back up lights will be on when the switch is on. I bet it wouldn't be an issue on a new vehicle either but I wouldn't chance it. I wouldn't want my backups on when the LEDs were on either.

Last edited by trlrdrdave; 03/08/17 04:58 AM.

"In time of war, send me all the Alabamians you can get, but in time of peace, for Lord's sake, send them to somebody else." General Edward H. Plummer

"Blessed are those who, in the face of death, think only about the front sight." Jeff Cooper

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