Do I need to change flasher relay also?
1668821
Not necessary, connecting these resistors will create proper load for your LED light to flash normal.
1668822
I did not need to (nor did I plan to) change any relay -- just needed to adjust the 'load' of the LEDs to match more appropriately to the normal characteristics and ckt performance of traditional light bulbs and sockets. Everything worked fine (better), with these devices added in-line with the blinker (LED) leads.
1668823
No. You should not have too. These did not work at all on my 05 Jeep Liberty, and got so hot they melted the plastic inside the signal light module area. I removed them and threw them away. Waste of time and money installing. FYI
1668824
No. These will conduct all the necessary relay functions to refrain LED bulbs from rapid flashing.
1668825
You shouldn't need to change the flasher relay, I have installed these on several vehicles and not had to change flashers.
1668826
I use these on every installation I do and I've not had to change out the flasher relay yet. I've not experienced any issues with these load resistors I use these with confidence every time with every install. ~Dubbs~
1063934
First off why did you change the bulb? Great upgrade to LED. If you had a brake light problem to begin with it may be your B.L. Switch. If neither of them work it must be up line. Try testing the bulb ground the outer housing and put 12v to each terminal if they work it is your vehicle test light those sockets. If you have power while the blinker is on then make sure they are not frozen in place spray a lube in the socket and use a non conducting push rod to loosen the springs. Hope this helps. Also if you change front and rear you need a low voltage flasher.
1731032
The Phase 7 lights are plug and play. You shouldn't need anything else to change them out
1724777
I installed one in my 2004 Silverado with LED's in the rear and filament lamps in front and it worked great. Will your lights turn on at all and not flash or do they just not come on at all? Did they work with your old flasher & just flash rapidly? My old flasher made my signals flash rapidly w/led's until I put this flasher in and then it slowed it down to normal speed. Put your old flasher in to see if your lights work. It could be you have bad flasher.
1467675
Makes no difference. They can be interchanged. Go out and take both tail lights out (it's not that hard)and see for yourself.
2263021
Did for mine. I had originally installed the HID bulbs without relays and found that to be unacceptable. This harness solved my problem but again using HID bulbs which draw less current. 14vdc is optimum; relay will work with less.
2194828
No. Wire it in ahead of where the harness splits and goes to the different lights IF you want your regular brake lights to flash. Most people are wiring them in to the third brake light only though. If you use one unit for each light, you will have lights blinking at different rates.
1587407
I did not buy one, and my 2003 Yukon XL works fine, I would hold off on buying the flasher until you have installed the led lights. If your blinkers don't work properly then I would order the aftermarket flasher.
841590
Yes. Bypass the flasher/control module and wire them directly to a continuous 12 volt source with a recommended switch so you can turn it on and off. Caution: They get extremely hot in summer months for this type application. Just be careful
614781
As long as your current taillights use an 3157 bulb, yes. If used as turn signal you will need a resistor to slow the flash rate.
1159004
One would need to press brake once to supply power to the unit. Flasher can not be configured without the power.
149343
I try them without load resistors, and it messed up my parking/stop lights. Had to take it to the dealer, charged me $86 bucks to fix. I just bought a relay.
149347
No. If you dont put in load resistors the lights might blink fast, and a fault code might occur (or engine light). My car (an E36), did not originally have a "switch back" light function on the corner lights, so I had to wire in relays as well.
812189
I would recheck the connections, and then the relay. You could swap the other relay if it's working properly.
1473843
No, they're two separate components. You might consider getting new turn signals to match the new headlights if you like the "new" look. Otherwise just replace what is needed.
343856
If brake , park , and reverse lights are working properly and it's only the flashers that aren't working my go to would be a relay or fuse. But then again it works fine with the old one so that may point elsewhere. My emergency flashers work fine but my regular turn signals don't.
1099951
No you have to change the fuses and circuit breakers over from your old one. Its not hard but suggest you put some notations down on paper it will help