Mfc-01 Help Needed Please.....

[SWAGGER]

:blink:Hi all,

Really hoping someone can help me out.

For those who know the Knight Hauler, there are two orange/amber blinkers on the the air cleaners, just begging to be lit up. Looks really easy too, they even have little holes for LED's and cover plates like all the rest of the lights. Problem is, the MFC-01 does not provide extra blinker lights for them.

I have seen it done, on a You Tube vid of someones truck. I figured, can't be to hard, just splice to more front blinkers into the two existing ones, one each side, right? Well, did that and they don't work.

First thing I did was chop off the existing front blinkers and temporarily connected up the new LED's that I wanted to add in. They worked fine, green is neg and yellow is pos. Sorted.

So then I splice in the new LED with the existing one, solder it all up really neatly and even have a neat heatshrink job done. There is no logical reason for this not to work, but it doesn't.

It's like they the new LED's are not even there, I am still at square one, ie, the originals work as they always did and both of the new ones are non functional.

I know the LED's worked before I soldered them in.

I have seen and heard of loads of people adding in extra lights, dipped, full, front, rear and so on, but has anyone here ever added in extra blinkers on an MFC-01?

It should work shouldn't it?

Thanks guys!

[Tamiya Cowboy]

Ok common Issues to have trying to splice in Leds.. I have done this on my truck but the reason why it dont work is that you have the LED wired wrong or I am betting you have the wrong value LED..If this is what it wrong you need to get a matching LED...I am thinking you need to check you + and - again you might have them backwards.

[SWAGGER]

Thanks for that. I have the polarity right for sure, checked a million times. I even have a multi-meter to check before I connect anything.

So I guess the LED's must be of the wrong value. They are just mini (3mm) hyper LED's from over the counter. Have no info/spec on them. I tried connecting them to other outputs on the MFU and they burnt out. What kind of LED's should I use/buy?

On my last attempt this evening, I used some resistors on the anode, thinking that the LED's I have were sucking too much current, so the resistors will both regulate the current drawn and also protect the LED. Seems fine now when connected to straight power, but again, even with the resistors, I tried to reconnect to the front blinkers and they don't work. I have noticed (on youtube etc) that anyone with LED's in the Knight Hauler air cleaners, have them always on as opposed to blinking, so the blinker circuit must not allow anymore than one LED.

Where is the best place to connect extra LED's, should you be able to splice off existing lights or should you be connecting to a spare outlet.

J13 seems to be empty/unused, anyone know what that is for?

I have also notice a four pin, brown connector on the bottom of the MFU connector block, under the servo connectors. Beside this connector, on the PCB, it is marked as "1." I cant see what this is for. Any ideas?

I know the 6 pin white connector on the opposite side is for the trailer lights. I am just trying everything but obviously would like any additional lights to come on with the existing lights as opposed to being on as soon as you power up the truck.

Sorry for being a pain in the neck, but this is driving me mad, I know this is doable, and i'm handy enough with electronics so it's frustrating the badword out of me that I can not make this happen. It probably is something as stupid as the wrong type of LED, hopefully that's all it is and I can easily sort that out.

Thanks for the advice and time,

Steve.

[Mouton]

I wanted to use the air cleaner lights for extra on my Knight Hauler and did that mod about a year ago.

As I considered that Tamiya may have used special spec LEDs I simply ordered a set of spare from the pair meant for "Roof Lights" (you will find the spare part # in the MFU manual).

The spare socket on the MFU is activated by the fog lights, if memory serves me right. (If not it was the high beam switch.) I think I ended up connecting mine in paralell on the roof lights connector. I did not notice any weaker light output, so it can supply four LEDs on that connector.

[Mouton]

What you want is one 7175101 Roof Lamp