burnt resistor in flasher relay

[GR3Y5H3ART]

followed this guide but wanted the resistor ASAP and picked up one where the guy said it everything was almost 100%

installed, and resistor burnt and left turn signal wont stop blinking?


problem happened when installing LEDs in Front turn signal. had Rear turn signals

http://www.v6performance.net/forums/...n-signals.html

[stj]

Re: burnt resistor in flasher relay

you want to start again.
in detail and without refering to a forum where nobody understands what they are doing.

btw, if the flasher changes speed it's probably thermal(bi-metal strip) rather than electronic.
the answer is to use an electronic relay, not load it down with ballast resistors that will get hot and burn stuff.

[Mad_Professor]

Re: burnt resistor in flasher relay

There is not enough information.
The guide is great and all and I know what you're trying to do, but without any knowledge of car you are working on or relay in question, and the type of LEDs/ wattage per LED set, we can't help you.

[Agent24]

Re: burnt resistor in flasher relay

Going on a wild guess that might be totally wrong, I'll try to interpret your post and say you were impatient to do the mod, didn't buy the specified 1 Watt resistors from Digikey, but instead bought some 1/4 Watt or so ones from a local shop, which couldn't handle the power dissipation and burnt up.
That, or you did a bad soldering job and shorted something out.


We need photos of YOUR flasher circuit, the resistors you bought, and your soldering work. Without these it's impossible to give any good advice aside from wild guessing!

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

hopefully these pictures will be good enough. it was my 1st time soldering something like this but already unsoldered the old one

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

Going on a wild guess that might be totally wrong, I'll try to interpret your post and say you were impatient to do the mod, didn't buy the specified 1 Watt resistors from Digikey, but instead bought some 1/4 Watt or so ones from a local shop, which couldn't handle the power dissipation and burnt up.
That, or you did a bad soldering job and shorted something out.


We need photos of YOUR flasher circuit, the resistors you bought, and your soldering work. Without these it's impossible to give any good advice aside from wild guessing!

sort of but i called Radio Shack and they did not have it and referred to me to a specialty shop in Boulder, drove up there and it was watt for watt ohm everything

info i'm getting now is it might have to be way lower like twice or 3 times lower.

from a member on a site who had my same prob:

That guide is good, but ignore the part where it says you need a .12 ohm, idk it wasnt strong enough for my car, I needed .24 and once I added LED's to the rear I needed a .48.

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

you want to start again.
in detail and without refering to a forum where nobody understands what they are doing.

btw, if the flasher changes speed it's probably thermal(bi-metal strip) rather than electronic.
the answer is to use an electronic relay, not load it down with ballast resistors that will get hot and burn stuff.

what i also tried was adding loaded resistors to the front 2 turn signals but that did not help

i dont mind the hyper blinking but do need my left turn signal to work

the right turn signal works and blinks normally which is nice but i would rather have both on and hyper blinking

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

There is not enough information.
The guide is great and all and I know what you're trying to do, but without any knowledge of car you are working on or relay in question, and the type of LEDs/ wattage per LED set, we can't help you.

I will try and provide more info but never had problem with the rears only when installed the 2 front ones

[Agent24]

Re: burnt resistor in flasher relay

sort of but i called Radio Shack and they did not have it and referred to me to a specialty shop in Boulder, drove up there and it was watt for watt ohm everything

info i'm getting now is it might have to be way lower like twice or 3 times lower.

Yeah it looks like a 1 Watt resistor, but I'm not surprised it doesn't work.
What you've used is a 12 Ohm resistor, and the tutorial you linked to specified an 0.12 Ohm resistor. You're using a resistor which is 100x higher resistance than specified.

Have a look at this: http://www.digikey.co.nz/en/resource...or-code-4-band

[budm]

Re: burnt resistor in flasher relay

Looking at the board lay out, that current sensing resistor is in series with the load, so if it burnt up that means the wattage raring of the resistor is too low, or the load is shorted or too low of the resistance.

[Agent24]

Re: burnt resistor in flasher relay

Looking at the board lay out, that current sensing resistor is in series with the load, so if it burnt up that means the wattage raring of the resistor is too low, or the load is shorted or too low of the resistance.

Perhaps a different resistor on the board burnt? He didn't show the other side clear enough, but the one in his photos looks rather unscathed.

[redwire]

Re: burnt resistor in flasher relay

The resistor is the wrong value (12 ohm) and one leg looks like it is bent and shorting to the connector pin. Also, the module has power all the time, so best to disconnect your battery or the fuse when messing with it.

The flasher IC is an Atmel U2044B (datasheet)

Lamp outage (double-fast blink) gets activated below:
0.03 ohm = 2.7A / 32.4W
0.12 ohm = 0.68A / 8.1W
0.22 ohm = 0.37A / 4.4W
0.47 ohm = 0.17A / 2.1W
12 ohm = smoke

Power rating of 1/4W to 1/2W for the sense-resistor is fine.

[budm]

Re: burnt resistor in flasher relay

The original resistor in the Video is also installed on the component side of the board, you guy have good eyes, the pictures are way out of focus for me.

[Agent24]

Re: burnt resistor in flasher relay

I'm guessing the IC part number came from the photos in the original link.

[stj]

Re: burnt resistor in flasher relay

lifting pin5 on the chip may do what your after.
*after you repair it.

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

the Resistor arrived from DigiKey

Part #: 12ACCT-ND
RES 12 OHM 1W 5% Axial

i dont think the Resistor is causing the problem since it might be the wiring so based on the wiring diagram, is there a way to fix it before having to shell out for a new ECU? (already located one at a good price)

here's the best pics i could take of the OEM Relay

6 Pins

1 - E
2 - LL
3 - LR
4 - TL
5 - TR
6 - B

and 3rd pic, based on Haynes this should be the pic for the pins

[Agent24]

Re: burnt resistor in flasher relay

the Resistor arrived from DigiKey

Part #: 12ACCT-ND
RES 12 OHM 1W 5% Axial

I'm confused now. Why are you buying 12 Ohm resistors when the guide says to use 12 Milliohm resistors?

The guide says to use this one: http://www.digikey.co.nz/product-det...CCT-ND/2059055

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

based on this pic, and going Left to Right

E, LL, LR, TL, TR, B

then

2 RED/BLU & 3 (BRN) should be the wires i should check and hopefully redoing them will fix the signal going to the MCU or Main Control Unit?

[GR3Y5H3ART]

Re: burnt resistor in flasher relay

I'm confused now. Why are you buying 12 Ohm resistors when the guide says to use 12 Milliohm resistors?

The guide says to use this one: http://www.digikey.co.nz/product-det...CCT-ND/2059055

you are right, i got 12ACCT-ND when it should be 0.12ACCT-ND

not sure why i disregarded that Zero

[stj]

Re: burnt resistor in flasher relay

can you take some decent well-lit foto's of the board - specially around the chip.
there is some shadowing on the original foto's that could be a flash-mark.

and then lifting pin5 on the chip instead of fitting a resistor would be worth a try.