Cargo Lights as Back Up Lights

[port43]

Ok here are the step by step directions

Spoiler: DIRECTIONS

Directions on the cap/resistor wire assy HERE.

Pop open the Interior Fuse Cover/ Steering Column Trim Panel

Remove the headlamp switch trim panel to give aces to the cargo lamp switch connector
EDIT - I could not get this to fully release, its has a screw above the cargo light switch. To remove that you need to also remove the vent/trim above. I was able to get to the connetor wiout doing this. Just be aware that the headlamp switchtrim panel does not come out as the manual states!

And unplug the connector from the Cargo lamp switch

Tap into to the 2 wires Black-Grey and Violet-Grey

Tap into the Green-Brown reverse wiring coming out of the BCM

Relay attached - ground not yet

Install Complete

And the results

Okay, I'm finally getting around to this and you have the step "Tap into to the 2 wires Black-Grey and Violet-Grey" but it looks more like white and black/grey by the schematic? Your pic even seems to look like this. I'm going this route, wish me luck.

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[micl9]

Okay, I'm finally getting around to this and you have the step "Tap into to the 2 wires Black-Grey and Violet-Grey" but it looks more like white and black/grey by the schematic? Your pic even seems to look like this. I'm going this route, wish me luck.

Good catch Thanks Tony!
Instructions edited!

And reply back on how it works for you.
One annoyance I have noticed is when I back into a parking spot my cargo lights stay on after I lock truck and walk away.
Can always hit the cargo switch before getting out, but I am thinking of a way to idiot proof it.

 

[port43]

Good catch Thanks Tony!
Instructions edited!

And reply back on how it works for you.
One announce I have noticed is when I back into a parking spot my cargo lights stay on after I lock truck and walk away.
Can always hit the carge switch before getting out, but I am thinking of a way to idiot proof it.

Well that worked @micl9 but once the cargo lights come on they won't turn off unless I hit the switch. What did I do wrong? Do I have a bad relay?

 

[micl9]

Well that worked @micl9 but once the cargo lights come on they won't turn off unless I hit the switch. What did I do wrong? Do I have a bad relay?

No that's correct, if you drive off they will automatically turn off after a certain speed.
Does that happen? It should as that is built in stock.

 

[port43]

Good catch Thanks Tony!
Instructions edited!

And reply back on how it works for you.
One annoyance I have noticed is when I back into a parking spot my cargo lights stay on after I lock truck and walk away.
Can always hit the cargo switch before getting out, but I am thinking of a way to idiot proof it.

Well your edit answered my question. I would have thought that after the reverse signal stopped, they would go off. I have a buddy that is a 12 volt auto genius so I'll ask him how to correct.

 

[port43]

No that's correct, if you drive off they will automatically turn off.
Does that happen? It should as that is built in stock.

I'm not sure if they'll go off after driving away. It's only me so I'm just in the garage using the emergency brake while I check. They come on in reverse but don't go off when switched to drive. I haven't actually moved the truck.

 

[micl9]

Well your edit answered my question. I would have thought that after the reverse signal stopped, they would go off. I have a buddy that is a 12 volt auto genius so I'll ask him how to correct.

There were 2 ways to set up - driven purely off the reverse signal (which would require a power line be run to the relay) or thru the BCM as I did here.
I didn't want to run a power line so I choose the BCM route. The drawback is they will stay on if you don't drive off. The BCM turns them on or off based on a momentary gnd pulse.
BUT - the battery tender will shut them off after a time to keep the battery from draining too far.

 

[port43]

There were 2 ways to set up - driven purely off the reverse signal (which would require a power line be run to the relay) or thru the BCM as I did here.
I didn't want to run a power line so I choose the BCM route. The drawback is they will stay on if you don't drive off. The BCM turns them on or off based on a momentary gnd pulse.
BUT - the battery tender will shut them off after a time to keep the battery from draining too far.

Okay. This will be a problem for me since I back into my driveway so they would just stay on. As I said, I'll get my buddy to sort it out and post a solution.

 

[port43]

and just to give everyone something to laugh about because Tony luck. Trying to get the cargo switch out, I broke the tabs on it trying to get the connector out so now it's floppy.

 

[micl9]

and just to give everyone something to laugh about because Tony luck. Trying to get the cargo switch out, I broke the tabs on it trying to get the connector out so now it's floppy.

That part was kinda hard - I am learning that the manual does not always match our truck, both wire colors and disassembly instructions. I will go back and add a note to my install procedure.
Sorry if I steered you wrong!

 

[port43]

That part was kinda hard - I am learning that the manual does not always match our truck, both wire colors and disassembly instructions. I will go back and add a note to my install procedure.
Sorry if I steered you wrong!

PpPpPpP Nothing I did was your fault, Brother. My buddy got back to me and we'll take care of this on/off shit easily. Thank you for giving me something to do! HAPPY EASTER.

 

[port43]

That part was kinda hard - I am learning that the manual does not always match our truck, both wire colors and disassembly instructions. I will go back and add a note to my install procedure.
Sorry if I steered you wrong!

BTW, that white to green/brown almost got me. I couldn't get the Posi-tap to fit the wire (I went so far as to get your EXACT parts) then realized I had a brown/green wire (it was too fat). Who knows what I would have hooked up to. Cargo lights come on when I hit a turn signal?

 

[micl9]

Yes Happy Easter!
And I am getting ready for my next wiring tango.
Lariat Mirrors! Probably next Friday. Already found some wiring surprises vs the manual. Some good some bad. Well maybe not bad, but confusing. There is a ground line in the harness connector and no pin in the mirror. But it saves me running one extra wire.
Enjoy the rest of your Easter weekend.

 

[port43]

Yes Happy Easter!
And I am getting ready for my next wiring tango.
Lariat Mirrors! Probably next Friday. Already found some wiring surprises vs the manual. Some good some bad. Well maybe not bad, but confusing. There is a ground line in the harness connector and no pin in the mirror. But it saves me running one extra wire.
Enjoy the rest of your Easter weekend.

It must've just been something with the sequence of events because I haven't had an issue with the light staying on. Just ran to the store and it went off between there and the car wash. Then when I got home and backed up the driveway, it went off as soon as I locked the doors with the fob.

YAY! Thanks, for sticking with me Mike.

 

[micl9]

It must've just been something with the sequence of events because I haven't had an issue with the light staying on. Just ran to the store and it went off between there and the car wash. Then when I got home and backed up the driveway, it went off as soon as I locked the doors with the fob.

YAY! Thanks, for sticking with me Mike.

Well I guess I need to double check that!
I believe you are the 1st guinea pig to duplicate this mod - THANKS!
Glad it's working for you!

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