Trailer inside lights don't work
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Trailer inside lights don't work
Do I need to get something different to make the interior lights on a cargo trailer to work? Hooked up truck, running lights on,truck running no inside lights function. Running a 7 pin plug to factory Ford setup. Can't figure it out. Ground is good and power wire goes to the 1 o'clock position on the truck plug recepticle.
Its a 19 f350 powerstroke
Its a 19 f350 powerstroke
Logistics Pro
Joined: Apr 2000
Posts: 4,334
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From: Mills River
Frankly, I’m not sure about what it takes to get the @#&$% “smart” trailer circuit controller to work. Assuming your truck’s trim is higher than XL, here are some things to try:
1. Does your trailer have a house battery? It might need one.
2. Are the trailer lamps LEDs? You might need an adapter to increase circuit loads.
3. Check fuses #42 (40A) and #65 (30A) in the engine compartment fuse box.
4. You might need to create and activate a trailer profile in the instrument panel trailer folder.
5. Once the trailer is hooked up and plugged in, you might need to start the engine, press the brake pedal, and put the transmission in gear to activate the trailer battery charging circuit.
6. When your truck recognizes the trailer, it should change the turn signal lane-change feature from three blinks to five.
7. With the trailer profile active, your truck’s instrument panel display should default to the trailer display when you start the engine.
8. Have you checked the trailer’s interior lights with an independent power source?
Some combination of the above may help you sort this out.
HTH,
Jim / crewzer
1. Does your trailer have a house battery? It might need one.
2. Are the trailer lamps LEDs? You might need an adapter to increase circuit loads.
3. Check fuses #42 (40A) and #65 (30A) in the engine compartment fuse box.
4. You might need to create and activate a trailer profile in the instrument panel trailer folder.
5. Once the trailer is hooked up and plugged in, you might need to start the engine, press the brake pedal, and put the transmission in gear to activate the trailer battery charging circuit.
6. When your truck recognizes the trailer, it should change the turn signal lane-change feature from three blinks to five.
7. With the trailer profile active, your truck’s instrument panel display should default to the trailer display when you start the engine.
8. Have you checked the trailer’s interior lights with an independent power source?
Some combination of the above may help you sort this out.
HTH,
Jim / crewzer
Thread Starter
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Senior User
Joined: May 2010
Posts: 124
Likes: 0
Frankly, I’m not sure about what it takes to get the @#&$% “smart” trailer circuit controller to work. Assuming your truck’s trim is higher than XL, here are some things to try:
1. Does your trailer have a house battery? It might need one.
2. Are the trailer lamps LEDs? You might need an adapter to increase circuit loads.
3. Check fuses #42 (40A) and #65 (30A) in the engine compartment fuse box.
4. You might need to create and activate a trailer profile in the instrument panel trailer folder.
5. Once the trailer is hooked up and plugged in, you might need to start the engine, press the brake pedal, and put the transmission in gear to activate the trailer battery charging circuit.
6. When your truck recognizes the trailer, it should change the turn signal lane-change feature from three blinks to five.
7. With the trailer profile active, your truck’s instrument panel display should default to the trailer display when you start the engine.
8. Have you checked the trailer’s interior lights with an independent power source?
Some combination of the above may help you sort this out.
HTH,
Jim / crewzer
1. Does your trailer have a house battery? It might need one.
2. Are the trailer lamps LEDs? You might need an adapter to increase circuit loads.
3. Check fuses #42 (40A) and #65 (30A) in the engine compartment fuse box.
4. You might need to create and activate a trailer profile in the instrument panel trailer folder.
5. Once the trailer is hooked up and plugged in, you might need to start the engine, press the brake pedal, and put the transmission in gear to activate the trailer battery charging circuit.
6. When your truck recognizes the trailer, it should change the turn signal lane-change feature from three blinks to five.
7. With the trailer profile active, your truck’s instrument panel display should default to the trailer display when you start the engine.
8. Have you checked the trailer’s interior lights with an independent power source?
Some combination of the above may help you sort this out.
HTH,
Jim / crewzer
Lariat package
1. No house battery
2. Inside is led outside is not. I switched the truck to led and forscan adjusted for led
3. I will check those fuses.
4. Profile active in truck.
5. Trailer hooked up while running but did not tap brakes. Will try that. The profile did activate however.
6. Yes it does I actually used forscan to bump regular to 5 blinks which makes trailer 7 blinks
7. Yes it does
8. Yes ran wires directly to a spare battery before wiring them in to trailer system.
I will try the depress brake pedal after hooking it up as that seems to be the general consensus. If it does work that has to be the dumbest thing ever to activate power source through 7 pin plug ever
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7 pin plug. The interior lights actually go through the 7 pin. They don't go anywhere else. Traced all back to the 12 v power on the plug.
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Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
1. No house battery
5. Trailer hooked up while running but did not tap brakes. Will try that. The profile did activate however.
I will try the depress brake pedal after hooking it up as that seems to be the general consensus. If it does work that has to be the dumbest thing ever to activate power source through 7 pin plug ever
I’ve seen comments about depressing the brake pedal for several seconds, putting the truck in gear (and then back into neutral for testing), and even having to increase the Diesel’s idle speed.
It is indeed a stupid design, IMHO. And, again IMHO, the idiocy is compounded by the incredibly poor “instructions” In the OM.
Best of luck!
Jim / crewzer
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
HTH,
Jim / crewzer
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The wires are wired to the 7 pin plug on the trailer. Nothing going to anywhere else on the trailer. Using all existing wiring.
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No using the one at 1oclock on the truck side. Trailer is all factory wiring.