How to adjust rear turn signal

[hb.sagen]

My vehicle have some dealer installed orange blinkers in the rear fender, to comply with our laws over here. And disabled the original rear red blinkers. I am not sure what blinks on the US vehicles.

But when driving with the tailgate down, the orange new blinkers are mostly hidden. I want to activate the original red blinkers as well, to help the cars behind me to understand my intentions. But I am not sure what to adjust in forscan.

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[digitaldad]

Liking all of your Norwegian challenges/posts here.

Have you popped one of the tailights yet? I imagine they just modified the wiring to extend to the new turn signals (thus disabling the OEM blinker wiring).

The refresh rate sucks being filmed but this part of video shows the entire light blinking when blinkers are on.

 

[hb.sagen]

Great, thanks. I will have a look at the harness.

My new orange blinkers are a pair of sorry looking, minuscule things that probably come from am RC-car. Will post some pictures tomorrow. They are just weird.

 

[FloridaMan655321]

Pics of the dealer installed blinkers? I'm really curious as to what they look like. It seems like amber blinkers were really popular here in 'Murica back in the 90s/00s

Norway has some strange laws. They are really hard on people who brew their own beer, and with alcohol in general.

 

[K6CCC]

It seems like amber blinkers were really popular here in 'Murica back in the 90s/00s

I have some serious dislikes about a lot of the way lighting works on many cars these days. In my opinion, on the rear, brake and turn should NEVER use the same bulb and the turn should be yellow. I'm OK with brake and tail light being the same bulb as many cars are with the brake much brighter than the tail light. On the front, no steady light (DRL, clearance, headlight) should be turned off in order to display the turn signal. Lastly, I am strongly opposed to DRLs at all. The reason is because of the HUGE number of cars driving completely blacked out except for the DRLs. And God forbid, don't require automatic headlights to resolve the DRL issue.

 

[FloridaMan655321]

On the front, no steady light (DRL, clearance, headlight) should be turned off in order to display the turn signal.

That is a weird thing that manufactures do. I'm really not a fan either.

 

[MountainAlive]

Pics of the dealer installed blinkers? I'm really curious as to what they look like. It seems like amber blinkers were really popular here in 'Murica back in the 90s/00s

Norway has some strange laws. They are really hard on people who brew their own beer, and with alcohol in general.

I’d also like to see some pics. Personally I think amber is a safer color than red for this use case.

 

[hb.sagen]

 

[digitaldad]

Ahh, interesting. You should be able to lay under the bed and follow the wires from the blinkers to their destination...either into the tail lamp assembly, or maybe they splice into wiring before there (maybe they snip the blink wire before it even gets to the rear tail lamp - or maybe a new harness).

Is this mass available in your Country or was it imported?

 

[hb.sagen]

Norway got a 1000 2023 Lariats in 2023, and they are still selling from that lot. So they should all be modified the same way.

It looks as they are tagged to the trailer harness, after a quick look. Could the real blinkers be disabled in forscan, or are they just unplugged?

 

[digitaldad]

Ahh, spliced into the trailer wiring then.

I am not aware of a FORScan fix but there could be one. Hard to imagine the ability to turn off the blinking capability when AFAIK there are not separate LEDs for the blink function, it seems to just cycle the 12v on/off power (maybe, I'm wrong).

It is possible those tail lamps omit the blinking capability (different model/part number) but I would think the blink execution in the harness is simply bypassed.

We need a schematic of the tail lamp assembly/harness.

 

[hb.sagen]

Compared to my previous vehicles there is a lot of exposed wiring underneath this truck. I need to cut some zip ties to figure out what's going where.

 

[bmwhitetx]

Here are schematics of tail lamp wiring and trailer harness. It seems if they tied into the tail lamps then both your new amber lamps would illuminate when you press brake since they share the same wire for turn and stop.

A seven-way trailer connector has pins for left turn, right turn, and brake. I thought brake was just for electric brakes and that the turn signal wires also illuminate for stop (like they do for a 4-wire trailer connection). But a trailer guy (I'm not) can correct me there.

 

[hb.sagen]

Great, we got a 13 pole trailer contact over here: https://en.wikipedia.org/wiki/ISO_11446

This is also installed on mine.

 

[digitaldad]

Here are schematics of tail lamp wiring and trailer harness. It seems if they tied into the tail lamps then both lamps would illuminate when you press brake since they share the same wire for turn and stop.

@bmwhitetx - You da man!

Originally, I meant that they harnessed into the taillamp to feed the orange signals.

Since he confirmed it was tied into the trailer wiring. I wonder if they still ommit the feed to the blinker power pin in the harness on the taillamp.

The "OEM" version of his turn signals (and how its wired) still makes my gut think these are our same tail lamp assemblies...but maybe not.

@hb.sagen , assuming you start with removing left tail assembly, I would be looking to see that you have the green with blue stripe from the vehicle into the harness from the truck (they show a break with C408) so I assume that is a male/female harness connection and the tail lamp has a wired pigtail (with the other side of the opposite harness). If you see the same wire continuing from the harness pigtail to the tail lamp assembly...then this may be programming or at the BCM (as indicated in the schematic...or both).

But I'm wondering if there is something forcibly changed there to stop the blinker (harness/spliced wire/or even pin removed in harness to on/off the 12v.

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