:confused: How can I keep the low beams on while the high beams are on?:confused:

I think Maxpower did a thread on that. That is how I wired mine, Lows, Highs & Fogs all on at once. Do a search for headlight mods.
Here it is....
http://dieselplace.com/forum/showthread.php?t=12804&highlight=headlight+mode

Very easy, just need a few diodes as described

For those who have done this, does the arrow of the diode point to the rear of the truck or to the front of the truck when run between the two relays? Secondly how hard was it to solder the wire on the relay, and what size wire did you use ie 20 gauge, 12 gauge, ?????

thanks

This was from GMC2500HD on the third page of the link, I printed this & did mine, I also replaced the bulbs with the HID's from Toshiba, I think.
NOTE: This is on a 2004 model truck only. I am not sure about the other years. I know 01-02 is different and not sure about 03.. Do this at your own risk... If you run the Diode backwards it will not work..This will be the result if you do this right...


http://www.dieselplace.com/forum/uploads/ALL_LIGHTS.JPG

actually only one diode needed, but Radio Shack sells them in pairs, so you are forced to spend the extra $.50!! :-)

I used 18ga stranded wire, soldered to the diode leads. This wire is thin enough that you can fit it into the relay socket along with the relay contacts, no permanent connection to the relay at all, just a friction fit into the socket.

can't remember which way the diode goes in, but all you do is try it both ways. One will work correctly, the other will not - no chance of damage to the truck either way.

this is how to wire the headlights, u can also make the fogs come on with a identical jumper going to the 85 post on the fog light relay. Just WRAP it around the post and put the relay back, dont go shoving those wires inside the box and fugeing up those conectors!

http://offroadworld.tenmagazines.com/gallery/04bowtie/129010.jpg

Some stuff here also

http://www.mrtaillite.com/


and here

http://www.mrtaillight.com/product_info.php?products_id=628&osCsid=24d498e268c917ee0189a7d7a22a8bf1

dont buy those kits, 50 cents worth of diodes ( cheapest u can find, they dont really have any amps going trough them) and some old wire and 15 mins is all thats needed.

I love this site, you guys make it awesome. I ask a question, and get a wide variety of answers. I just have to choose which one. I really do appreciate everything, thank you everybody. I have another project I am working on. I bought an overhead stock Panasonic dvd player/ monitor from ebay. So far I have got it to power up and play in the truck due to wire schematics and pin configuration charts from a buddy at the dealership. my next step is to pull the headliner and see if it will mount. Anybody put one of these in yet that might have some pointers? And again thank you to everybody.

Used the diodes, they work great, also have installed for many of my buddies.
Sooo quick and easy. Thanks.

I did the diode thing for my high and low beams, but what do you need to do for the fog lamps to stay on as well? Do you need a second diode?:help2:

I love this site, you guys make it awesome. I ask a question, and get a wide variety of answers. I just have to choose which one. I really do appreciate everything, thank you everybody. I have another project I am working on. I bought an overhead stock Panasonic dvd player/ monitor from ebay. So far I have got it to power up and play in the truck due to wire schematics and pin configuration charts from a buddy at the dealership. my next step is to pull the headliner and see if it will mount. Anybody put one of these in yet that might have some pointers? And again thank you to everybody.

Just a suggestion, you will get more responses if you start another thread with a topic to match your question.

Ya, I put an additional diode between my high beam relay and fog light relay, works great.

I did the diode thing for my high and low beams, but what do you need to do for the fog lamps to stay on as well? Do you need a second diode?:help2:


You can use 2 diodes or you can wire 2 wires on the end and go to you lo and fog relay, all with one diode.

Thanks. That makes sense. I have gotten a lot of great information off this website. Thanks again.
:cool2:

Question for someone here. I have a 2005 Silverado Ext cab. It's
a gasser (5.3) (I know, I know but you guys have good ideas ;-)

I used the diode for High beam to Low Beam and that works fine. I
used a diode for Fog to DRL and that works fine on its own.

If I have the Fog and DRL with low Beams, everything works. If I switch
to High beam then my Fog and DRL's switch off. I cannot have all
four on at the same time.

Does this happen to anyone else on a later model year? I assume that
High beam kills the FOG and I will need to connect FOG 85 to Hi (85) yes?

Stripped end of diode is pointing to HDLP-HI (85) and the other end of the
diode is connected to HDLP-LOW (85)

Stripped end of 2nd diode is connected to FOG-LP (85) (I realize it is in upper
left position for this relay) and the other end of the diode is connected
to DRL (85)

Switching High Beam toggles from High and Low on while turning FOG and DRL
Off. Switch back to Low Beam and Low, Fog and DRL are on.

Best Regards

Question for someone here. I have a 2005 Silverado Ext cab. It's
a gasser (5.3) (I know, I know but you guys have good ideas ;-)

I used the diode for High beam to Low Beam and that works fine. I
used a diode for Fog to DRL and that works fine on its own.

If I have the Fog and DRL with low Beams, everything works. If I switch
to High beam then my Fog and DRL's switch off. I cannot have all
four on at the same time.

Does this happen to anyone else on a later model year? I assume that
High beam kills the FOG and I will need to connect FOG 85 to Hi (85) yes?

Stripped end of diode is pointing to HDLP-HI (85) and the other end of the
diode is connected to HDLP-LOW (85)

Stripped end of 2nd diode is connected to FOG-LP (85) (I realize it is in upper
left position for this relay) and the other end of the diode is connected
to DRL (85)

Switching High Beam toggles from High and Low on while turning FOG and DRL
Off. Switch back to Low Beam and Low, Fog and DRL are on.

Best Regards

Ok so let me get this right you want to have your DRL and fog on whenever you have your lowbems on but you dont want them to shut off when you put your highs and when you put your highs you want high low fog and DRL? if so do this. click to enlarge
17703

What I was looking to do was have the following:

Low Beams only on low beam.
Turn on Fogs and then have low beam, RDL, and Fog.
Turn on High Beams and have all 4 on.

I understand how to make it work with a diode between
high and low, High and Fog, and then Fog and DRL.

I thought I could do it with 2 diodes that were between high and low,
and the second one between Fog and DRL.

I guess my question is.. is it normal that Fog gets switched off when
high beams are selected? (assuming stock config) Because Fogs are on
a dash switch, I didn't expect them to be defeated with the Hi Beam switch.

Appreciate the schematic above. It is very clear.

yes from the factory the fogs shut off on high beams.

Thank You for the info. Appreciate it.

Guess I'll add the other diode ;-)

Best Regards

Okay... I tried.

I hooked the white stripe end of the diode to the 85 high beam relay and the other end to the fog light 85.

I hooked the white stripe end of the diode to the 85 high beam relay and the other end to the low beam 85.

Everything works fine except when I hit the high beams the fog lights come on whether or not the switch in the cab has been depressed. I guess that makes sense - the high beam power is sending power to the fog light relay. Any way around this? Not sure it is a big deal, but your ideas would be appreciated.

Remove the diode from High to Fog & it will work normally. I like the idea & the effect of switching to High & everything comes on!

It seems to me that I read in another post that it is more difficult to get the foglights to come on with the switch when the highbeams are on than using the diode. If you put the diode in, the fog lights come on with the highbeams regardless of the fog light switch position (as you have already proven). Do a search for the all on headlight mod (or something like this), and you will find that the question has been asked by someone else. Don't recall if a solution has been found yet. I too would like to be able to control the foglights with the interior switch, and yet have them come on with the highbeams if I wish. By the way, the light output with both the lowbeams and the highbeams on is amazing. Much better visibility. Great results for a 5 minute, 0.50 cent mod.

why would you not want the fogs on with the highs?:think: The more lights the better!

why would you not want the fogs on with the highs?:think: The more lights the better!

I have had it for two nights now and... wow!

I guess the fog lights being on with the high beams isn't a bad thing. I just hadn't thought about it.

Thanks, great mod!

Question for you all. I started another thread a few days ago, but I only got one response. So I'll try it this way. A friend of mine gave me a pair of oem fog lights. I understand that the wiring is already there; all I have to do is get a factory switch. Well... I'd just like the fogs to come on when I turn on the high-beams. Do I still have to get a switch???? In a perfect world I would like for ALL (his, lows, fogs) my lights to come on when I hit the High beams and not even mess with a fog light switch. Any feedback would be appreciated.

Seems to me that you would need a switch if you want to control the foglights independently of the highbeams. If you just want them to come on when you select highbeams, check out the posts on the previous pages. There are some wiring diagrams with diodes there that explain how ti get everything to come on with the highbeams. Good luck.