2002 Sierra Denali LED turn signal issues

[demonte1997]

I feel really stupid asking this because I'm sure thousands of members have already tackled the NBS truck LED upgrade.  Running into a wall.. ugh.  

 

Upgrading the signal lamps with LEDs and running into some odd issues.  I only swapped the fronts and it made for some really bizarre stuff.  First, if the 3157 LED is installed, the 194 bulb socket doesn't work at all.  If I put the parking lights on, the flasher symbol stays on the whole time in the cluster.  The truck will buzz when I try to put the blinker on.  I changed the flasher module with the LED compatible one but it did nothing (perhaps I needed a different or better module).  If I turn the blinker on with no lights on, almost all the lights on the truck will flash.  This includes the cab, side marker, rear, license plate, cluster, radio, etc.  I also tried using load resistors with no improvement.  Perhaps I need to do all the flashers front and back in LED?  Admittedly, this was only for the front.  Still.. some of the results I've gotten so far are rather odd.  

 

I must be doing something wrong... any help is greatly appreciated. 

 

[bgbdwlf2500]

14 hours ago, demonte1997 said:

I feel really stupid asking this because I'm sure thousands of members have already tackled the NBS truck LED upgrade.  Running into a wall.. ugh.  

 

Upgrading the signal lamps with LEDs and running into some odd issues.  I only swapped the fronts and it made for some really bizarre stuff.  First, if the 3157 LED is installed, the 194 bulb socket doesn't work at all.  If I put the parking lights on, the flasher symbol stays on the whole time in the cluster.  The truck will buzz when I try to put the blinker on.  I changed the flasher module with the LED compatible one but it did nothing (perhaps I needed a different or better module).  If I turn the blinker on with no lights on, almost all the lights on the truck will flash.  This includes the cab, side marker, rear, license plate, cluster, radio, etc.  I also tried using load resistors with no improvement.  Perhaps I need to do all the flashers front and back in LED?  Admittedly, this was only for the front.  Still.. some of the results I've gotten so far are rather odd.  

 

I must be doing something wrong... any help is greatly appreciated. 

 

I wouldn't think it would matter how many you have changed but it might. What happens with the factory flasher and the LED that you have changed?

[carkhz316]

Just add the appropriate load resistors and it will take care of your issues. I can about guarantee it. If you do, you can swap the flasher back to the stock one as well.

[demonte1997]

Thanks for the replies.  For whatever reason, the load resistors were not solving it but I may have connected them incorrectly.