tast101
Supporting Member
Brought over from TF.com
Rollin Thunder said:OK. Here is a right up with lots a pics on how to do the 4 or 6 high mod. I always do the 6 high cause the more lights the better and it only take an extra 2 min or so. I did this to my 03 silverado, but the fuse box is the same on an 03-06 silverado, sierra, tahoe, suburban, yukon, yukon xl and so on. So it does not matter. I did the same exact thing in the same exact places on my 06 yukon and had them on for more than a year with no trouble, would still have them If I had not traded it. OK. THe hardest part is makeing sure the diode touches some metel on the relay. We will start out with just the 4 hi mode. Some people say you can put a diode under your dash board, I tried this, im a big guy at 6'2 and it was hard for me to get in to position here, then you gotta worry about removeing the PCM thing and all that crap. This is just much easier for me.
Ok first. Open your hood.
Then find your fuse box.
open the fuse box. Find the two relays that say HdLP-high and Hdlp- low. high one is all by it self all the way to the left towards the hood of the truck. Low is second from the bottom closest to the driver fender. RIght below the low is the fog. Usually the fog relay is black while the rest are grey.
On to pics.
First remove the LOWBEAM relay. This may need plyers, I damaged mine but they still work fine (knock on wood). Put it in the RIGHT REAR socket, it wont fit in, just make sure the metel on the diode is touching the metel on the relay. Keep the grey band pointed towards the highbeam headlamp or yourhighs will be on when ever your low beams are on, if you find this, just simply reverce the diode.... sorry my first 2 pics are bad, the rest are much clearer, but you get the idea
THen put the lowbeam relay back on. were done with this one enless you did not make sure metel was touching metel here. KEEP IN MINE THE DIODE METEL SHOULD ONLY TOUCH THE RIGHT REAR CORNER DIODE PEG!!! OR NOM 85 ON YOUR FUSE BOX MAP!!!
Then pull out your highbeam relay. an repeat the above step... IF you only want the 4 high mod. Just put the relay back. The DIODE end must be in the RIGHT REAR of the highbeam relay as well.
IF you would like to continue to the 6 high mod ( and I know you do) Then follow these extra steps.
Remove the fog relay. Put the diode in the TOP LEFT of the fog relay. MAKE SURE THE GREY BAND IS TOWARD THE HIGH BEAM RELAY!!!! install your second diode. IF you got the radio shack ones they come in 2 packs. 3 amp 50volt resistor diodes. Re install the fog relay again making damn sure metel is touching metel and only touching that one relay peg.
Then this gets kinda tricky, but after a few beers you calm down and get it done. get both diodes to touch the same RIGHT REAR peg of the highbeam relay. Then just jam in the highbeam relay, make sure both diodes are snug.
This should be your result with teh 4 high mod.
THIS SHOULD BE YOUR RESULT WITH THE 6 HIGH MOD!!!
